Journal
2018
of the Northern Territories Water and Waste Association
Publications mail agreement #40934510
Resiliency in
Northern Water Infrastructure
BRINGING INNOVATIVE SOLUTIONS TO STORAGE CONTAINMENT
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The Journal
Table of Contents
Editor’s notes.............................................................................................................................................................................6 Grise Fiord, Nunavut: a resilient and adaptive community...........................................................................8 Defining, designing, applying and refining resiliency in Northern water infrastructure..........10 The Living Building Challenge.......................................................................................................................................14 Potential Decentralized WASH solution for remote/Indigenous communities.............................16 Northlands Dënesųłiné First Nation sustainable wastewater treatment plant........................... 20 Emerging climate change issues and challenges for water systems in the Arctic.......................22 Infrastructure research in Qaanaaq, Greenland..............................................................................................26 Cold Regions Engineering: new Manual of Practice........................................................................................29 Cape Dorset metal management project............................................................................................................ 30 Working toward water resilience in Taloyoak, Nunavut...............................................................................32 NTWWA President’s Report Olivia Lee ...................................................................................................................35
INDEX TO ADVERTISERS Aecom....................................................................................................17
Harmsco Filtration Products..................................................25
Arctic Blaster.................................................................................... 15
Hay River Heavy Truck Sales Ltd.............................................3
Associated Engineering............................................................. 27
Hurlburt Enterprises Inc........................................................... 21
AWI..............................................................................................................5
MACA.......................................................................................................11
BI Pure Water (Canada) Inc.........................................................7
Mueller Canada............................................................................... 31
Canada Tank Solutions Inc.................................................... IFC
NAPEG....................................................................................................33
Canadian Water Quality Association................................ 19
Netzsch Canada Inc................................................................. OBC
Cancoppas Limited......................................................................... 9
Nexom...................................................................................................35
Carbon Enterprises Inc................................................................ 6
Nunatta Environmental Services Inc................................28
CB Shield.............................................................................................. 14
Ramtech Environmental Products.....................................22
Chemline Plastics Ltd....................................................................7
Reed Pipe Tools & Vises............................................................ 13
Delco Water........................................................................................18
Ron’s Equipment Rentals & Industrial Supply...........34
Denso North America Inc.........................................................26
Stantec..................................................................................................10
Dillon Consulting.............................................................................. 6
Taber Solids Control (1998) Ltd............................................. 13
Dominion Divers Ltd.................................................................... 19
Terminal City Iron Works Ltd.................................................. 19
DuAlaska Incorporated..............................................................23
Urecon................................................................................................... 21
ERE Environmental Remediation Equipment Inc......33
VW Cochrane Consulting...........................................................29
EXP Services Inc..............................................................................32
Water Blast Manufacturing.....................................................25
ON THE COVER
Harvesting ice bergs for water in Grise Fiord, Nunavut. 4
The Journal of the Northern Territories Water & Waste Association 2018
is published by DEL Communications Inc. Suite 300, 6 Roslyn Road Winnipeg, Manitoba Canada R3L 0G5 www.delcommunications.com President David Langstaff Publisher Jason Stefanik Editor-in-Chief Lyndon McLean lyndon@delcommunications.com Editor Ken Johnson ken.johnson@cryofront.com Sales Manager Dayna Oulion Toll Free: 1-866-424-6398 Advertising Account Executives brian gerow Ross James Mic Paterson
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© Copyright 2018, DEL Communications Inc. All rights reserved. The contents of this publication may not be reproduced by any means, in whole or in part, without prior written consent of the publisher. While every effort has been made to ensure the accuracy of the information contained herein and the reliability of the source, the publisherin no way guarantees nor warrants the information and is not responsible for errors, omissions or statements made by advertisers. Opinions and recommendations made by contributors or advertisers are not necessarily those of the publisher, its directors, officers or employees. Publications mail agreement #40934510 Return undeliverable Canadian addresses to: DEL Communications Inc. Suite 300, 6 Roslyn Road, Winnipeg, Manitoba Canada R3L 0G5 Email: david@delcommunications.com PRINTED IN CANADA 10/2018
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Editor’s NOTES
Editor’s Notes
Ken Johnson
Editor visiting grave site of Uncle Albert in Aklavik, NWT.
Writing this article finds me just returning from the Second Con-
Conferences/AIC_2016), and reciprocal attendance by Greenlanders
gress of the University of the Arctic (UArctic) in Finland, as a par-
at the NTWWA conferences in 2016 and 2017. The growing Greenlan-
ticipant in the WAter Sanitation and Hygiene (WASH) network within
dic and Danish connections were reflected in the abundant water
the University of the Arctic.
articles in the 2017 issue of the Journal – many thanks to the Green-
The UArctic Congress, and the UArctic itself, is an opportunity
landers and Danes for their efforts. Canadian Arctic water practitio-
for Canadian Arctic water practitioners to further advance the pro-
ners also have some well-established Alaskan connections that go
fessional connections we have made with Greenlanders and Danes over the past several years. These connections had their beginnings with the Canadians who attended the ARTEK (Arctic Technology Centre ) water conference in Sisimiut, Greenland in 2016 (http://www.artek.byg.dtu.dk/english/AIC-ARTEK-International-
back decades in some cases. It is time − and timely − for Canadian Arctic water practitioners to reach out to the European Arctic to mutually share our knowledge and expertise on WASH through the UArctic WASH network, and any other related information resources. The magazine theme of resiliency is very timely to some serious water issues that are developing across the north. These water issues have required some serious attention, most recently with the emer-
Quality & Service When Only The Best Will Do
gency water resupply for the City of Iqaluit. Our members were well postured with experience and expertise to respond to this emergency. The Journal has reported on other water supply emergency situations in Grise Fiord (Journal article 2008), and Arviat (Journal article 2013). Many thanks to Pearl Benyk, once again, for her editorial assistance, which raises the bar on the quality of the articles in the Journal. As always, I would encourage Journal readers to contact me about any Arctic water issues they have, or help they need, at 780-984-9085 (cell or text) or email (ken.johnson1@aecom.com or
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The Journal of the Northern Territories Water & Waste Association 2018
7
TOWN NAME
Hauling ice blocks to community 6 kilometres away.
Grise Fiord, Nunavut: a resilient and adaptive community Grise Fiord is Canada’s most northern community at 76O 25’ 08” North latitude, a mere 1,500 kilometres from the North Pole. Grise Fiord must be differentiated from the weather stations further north such as Eureka and Alert because it is the permanent home of 130 Canadians. Community infrastructure is tough to maintain at this latitude, and it was made “tougher” over the past decade with water resupply challenges. This challenge was written about in the 2008 Journal after an occurrence in the spring, when residents of the community were forced to use icebergs as their potable water supply to deal with a severe water shortage. The residents of Grise Fiord have a history of resiliency and adaptation, quite apart from their water supply problems. The creation of Grise Fiord was a social experiment by the Government of Canada that was perpetrated on a handful of illprepared families from northern Quebec in the 1950s. Most of the relocated Inuit had never experienced 24-hour darkness nor seen a muskox before, and their first few years in their new home were extremely difficult. Some families eventually returned to Northern Quebec, and others made a life in Grise Fiord despite being tethered to the air-supplied government assistance com-
8
mon to almost any remote fly-in community. Those who stayed demonstrated a resiliency and adapted to a new climate decades before these terms became common in the vocabulary of the far north. Grise Fiord is finding out firsthand that water − described as the bloodstream of the biosphere, and the determinant of a community’s future − is the one of the most significant aspects of climate change. Grise Fiord must replenish its water supply during a brief three-week window in the summer when there is sufficient glacier melt flow to fill several large tanks with enough capacity to supply the community for 12 months. The tanks must then be heated, at consider-
The Journal of the Northern Territories Water & Waste Association 2018
able expense, for almost 12 months. Coupled with a population base that is too small to absorb the same base infrastructure costs borne by other communities, Grise Fiord has some of the highest water costs in the country, with a rate approaching five cents per litre. By comparison, the cost of water in Ottawa is approximately one-tenth of a cent per litre, making water in Grise Fiord about 50 times more expensive than in Ottawa. Previous water shortages have occurred before. In 1997, the hamlet placed residents on half-rations of water in a bid to stretch dwindling supplies into midsummer. Conservation efforts began in April, when it became clear that the Hamlet’s 5.9 million-litre res-
Breaking up ice blocks by hand to place in the water tank.
By Ken Johnson, Senior Environmental Planner and Engineer, AECOM
ervoir was being depleted faster than usual. The second tank stood empty because the river had frozen, at the end of the summer in 1996, before it could be filled. Up until the late 1970s, iceberg ice was the community’s sole water supply from late September until the end of June. At a community meeting in 1975, an engineering consultant doing a water supply study asked the community council what water supply improvements they would like to see. The council replied that they would like more tools like the one they had found in the school. They had found this tool to be ideal for harvesting chunks of ice off icebergs. Unfortunately, the tool they found in the school had now been lost and they didn’t know the name of it. After much discussion, it was determined that the tool was a fire axe. The consultant sent them two fire axes. Thirty years later, the community was once again reverting to this “old technology” to obtain an interim potable water supply. The community would normally have the two huge water tanks filled with enough glacial runoff to last them for 12 months after the tanks were filled in June of each year. Unfortunately, maintenance work and a lack of sufficient rain in the summer of 2007 left the tanks under-filled. Grise Fiord officials issued an advisory urging residents to conserve water, while a six-kilometre ice road was built to the hamlet’s new water source: a massive iceberg. Loaders were used to break blocks from the iceberg and haul them into the community, where four people chipped them into smaller pieces and put them into the tanks. It was estimated at the time that this emergency “fix” for the water shortage problem would cost about $60,000. The federal budget tabled in March 2017 included $84 million over five years, beginning in 2018, to integrate traditional knowledge into understanding climate change. The
Grise Fiord, Nunavut
budget proposal committed to investments
nity is Aujuittuq, which translates as “it (the
in northern infrastructure to improve Indig-
glacier or the ice cap) never thaws”, but the
enous communities’ resilience to climate
glacier which provides the yearly commu-
change, including the risks associated with
nity water supply is no longer visible from
flooding.
the community. In 2017, for the first time, the
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9
Defining, Designing, Applying and Refining Resiliency in Northern Water Infrastructure By George W. Thorpe, Senior Engineer, BI Pure; and Ken Johnson, AECOM, Senior Planner and Engineer
In spite of the abundance of water in
wastewater treatment in Nunavut are par-
Canada, it can be a scarce commodity, par-
ticularly challenging due to its geographic
By relying on a method called “design
ticularly in Northern communities that re-
isolation, extremely cold climate, perma-
for resilience”, the infrastructure and sys-
quire a clean source of water year-round.
frost geology, extreme costs, limited level
tems put into place in Nunavut commu-
Winter can last eight to 10 months of the
of services, and other unique northern
nities can be such as to allow for a quick
year, and in winter, most of the surface wa-
community attributes.
return to near normal levels of functioning
could be even greater.
ter is covered with ice up to two metres
These circumstances, as well as addi-
even in cases of severe disturbances. The
thick. The north is also a desert, with most
tional stressors, can move Nunavut’s natu-
term resilience, or the ability to bounce
regions receiving less than 250 millimetres
ral and human systems toward their tipping
back after being disturbed, has been used
of annual precipitation, most of it as snow.
point and that may trigger extremely large
in many different contexts. However, in
Given these fundamental challenges, the
responses. If these systems are networked
this case, it is used specifically to refer
supply of community drinking water and
or interconnected, the impact on them
to the ability of critical infrastructure to
National Research Council Canada Arctic Program Elements of design
When your backyard has this background, you grow roots.
The NRC Arctic Program is still actively seeking partners and collaborators to help develop technology to ensure sustainable development for the communities of the Arctic. For more information contact Mark Murphy. 709 772 2105 Mark.Murphy@nrc-cnrc.gc.ca
We’ve got more than 40 years of direction, diligence, and delivery in the north.
Call for articles
2019 edition for the NTWWA Journal – the theme water and sanitation practices in remote European communities.
780-984-9085 ken.johnson1@aecom.com 10
The Journal of the Northern Territories Water & Waste Association 2018
www.nwtdrinkingwater.ca We know that drinking water is an important issue to Northwest Territories (NWT) residents and we want to clarify and explain how drinking water is made safe. This website includes information about drinking water in the NWT from source water to our tap. We want to provide information to residents that helps them feel conϐident in the water they drink every day.
Resources • • • • • •
Legislation Associations Lab Contact Engineering Guidelines Water Board Contact Water Quality Reports
Videos
Ensuring Safe Drinking Water • • • • •
Source Water Protection Water Treatment Monitoring and Testing Boil Water Advisories What We Test For
FAQ’s Roles and Responsibilities
The Journal of the Northern Territories Water & Waste Association 2018
11
Arctic Resiliency bounce back with reliability and robustness (strength) after a severe disturbance. Critical infrastructure includes processes, systems, and services that could cause death, discomfort, or destruction even if only momentarily disrupted. A wide range of shocks and stresses can impact critical infrastructure. These events might include damage, loss of power, water, human access, and reduced control of infrastructure due to severe rain, flooding, high winds, lightning, earthquakes, other natural disasters, or even cyber attacks. In the Arctic, there are additional issues with permafrost thaw, ground slumping, water shortages, distance between communities, and communication challenges. Longer-term climatic influences including
Figure 1 – Dynamic framework for planning and implementing resilient infrastructure
be extended when integrating higher cost
stakeholders and the use of engineering
factors such as artificial intelligence, in-
knowledge in many areas of expertise. The
creased design safety factors, and system
input of local stakeholders is an important
redundancies?
part of the process.
Resilience of an engineered system
Three attributes that can provide a re-
can be improved through dynamic design
silient system are: adaptability, integrity,
principles. The science of designing for
and tolerance. Resilient infrastructure and
resilience is key to integrating the factors
systems will have: 1) reduced probability
required for a successful future. It is there-
of failure; 2) reduced consequences from
sea level rise, floods, higher temperatures,
fore defined as the strategic design and
failures, in terms of lives lost, damage, and
severe storms, less permafrost, lower river
construction of critical infrastructure sys-
negative economic and social consequenc-
levels and lower stored water levels will
tems to sustain required operations during
es; and 3) reduced time for recovery (resto-
also have to be considered.
and after the impact of severe disturbanc-
ration of a specific system or set of systems
es, plus preventing, or adapting to, longer-
to their “normal” level of functional per-
term influences.
formance). When resilience is not designed
Measuring resilience is one of the most demanding tasks due to the complexity of the processes. Infrastructure and system
Substantial progress has been made in
and built in, there will most often be no
health after severe disturbances were ini-
the science of designing for resilience for
performance of the system or infrastruc-
tially calculated by estimating and manag-
southern infrastructure, but to advance
ture after a severe stress, and it will take a
ing the risks. Design of infrastructure was
an understanding of the best detailed
significant amount of time to recover.
thereby limited. Therefore, several years
methodology for northern latitudes, ma-
What is the best methodology for
ago, this way of designing critical infra-
jor collaboration between institutions and
planning for resilience and then build-
structure evolved into “designing for sus-
stakeholders is required. Infrastructure re-
ing resilience? Figure 1 shows a framework
tainability” and has now advanced into a
silience isn’t easy to spot until after a se-
which starts with planning – determining
more comprehensive design for resilience.
vere disturbance when the full recovery
the current threats and hazards and char-
Using a design for resilience involves
time is recorded. Each system has a specific
acterizing and analyzing the risks until the
combining stakeholder interaction with
value that can be measured, and measuring
resilience options are developed. The plan
various engineering skills, as well as tak-
these values is of key importance.
then needs to have the resilience actions
ing into account disaster experience, risk
prioritized and implemented. Moving into
Design for resilience framework
the building phase, the key is funding these
The most cost-effective manner of
activities, which is a proactive investment
tra capital cost for these improvements.
achieving infrastructure resilience is by us-
for harm reduction. The detailed design
Some are skeptical about the value of re-
ing an integrated set of engineering design
for resilience then takes place, followed
silience. Can the infrastructure life cycle
guidelines based on collaboration between
by construction and monitoring of these
management, systems design and strategic planning. A major factor is covering the ex-
12
The Journal of the Northern Territories Water & Waste Association 2018
improvements in order to learn from the things that went wrong or slowed things down. Refining and improving the loop of planning for resilience and then building for resilience can continue with new knowledge and an improved methodology. The Canadian Standards Association
GRAB & GO
is working to assist in the improvement of northern infrastructure by providing detailed documentation for designs to withstand a changing climate. The first five standards deal with drainage, permafrost, and snow load. Under development are
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Conclusion As the impacts of climate change on the North are increasing in frequency and
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severity, the new climate reality must be confronted with urgency. The process of accelerating and promoting the establishment of resiliency in the North should: • Mobilize existing knowledge by teaming up, and collaborating, with stakeholders; • Research known unknowns with a crossfunctional team in order to build capacity; • Transform existing infrastructure and sys-
LAGOON DE-SLUDGING Municipal & Industrial
Dredging & De-Watering Specialist
tems by making funds available for resilience efforts; and • Build new climate resilient and cost-effective infrastructure. The design for resilience methodology is advanced enough to allow a theoretical foundation for understanding best practice. It will continue to evolve as it is refined by adapting and applying new scientific practices and knowledge. To achieve northern critical infrastructure resilience goals, experimentation, iterative learning, and discovery by stakeholders is required. S
For more information contact Code Taber 780-466-7799 cody@tabersolidscontrol.com
www.tabersolidscontrol.com The Journal of the Northern Territories Water & Waste Association 2018
13
The Living Building Challenge
Rethinking Water & Wastewater Management The Intergovernmental Panel on Climate Change (IPCC) is warning the world that we need negative carbon emissions in order to stay below two degrees Celsius of global warming. However, besides controlling global warming, there’s a need for
increased community resiliency, as the effects of climate change are inducing more uncertainty in the natural world. Ecology North is currently spearheading a project to construct a Northern Centre for Sustainability (NCFS) in Yellowknife.
The proposed facility is targeting a “Living Building Challenge” certification, globally recognized as the most stringent green building certification. The space will host Ecology North’s offices and community education space. The Centre, in association with Ecology North, the Yellowknives Dene First Nation, Concordia University and the University of Alberta, will demonstrate proven precommercial technology for green buildings. The intent is to transfer the demonstrated knowledge and skills to northern communities. The first demonstration Living Building in Canada’s North will be energypositive, carbon-negative, water-positive, waste-positive and, most importantly, people-positive. It will actively promote technology replication, job creation and the reduction of greenhouse gas emissions through the Building Retrofit Economy.
The living building challenge
In contrast to Leadership in Energy and Environmental Design (LEED), the Living Building Challenge (LBC) is intent-based and aims for net positive impacts in its seven categories (Energy, Water, Materials, Place, Health & Happiness, Beauty, and Equity), which allows for more design freedom. The imperatives include but are not limited to: on-site renewable energy production of 105 per cent of the building’s annual energy needs; a strict list of prohibited materials; carbon-neutrality construction and operation; and communication of the various aspects of the challenge.
Water, wastewater and related requirements
Project water use and release must work in harmony with the natural water flows of the site and its surroundings. One hundred percent of the project’s water needs must be supplied by captured precipitation or other natural closed-loop water systems, and/or by recycling used project water, and
14
The Journal of the Northern Territories Water & Waste Association 2018
RETHINKING NORTHERN WATER
by William Gagnon, Green Buildings Specialist, Ecology North
must be purified as needed without the use of chemicals. All storm water and water discharge, including grey and black water, must be treated onsite and managed through reuse, a closed loop system, or infiltration. Excess storm water can be released onto adjacent sites under certain conditions. The use of chlorine and calcium hypochlorite are not permitted in association with the LBC due to the toxicity and other potential harmful attributes, leaving designers with limited options for water disinfection. Ultraviolet lamps usually contain mercury and are therefore banned if compliance with the materials objective is intended; ozone may be an appropriate option, but an in-line carbon filtration device is suggested to avoid any potential health threats. Alternatives to Polyvinyl Chloride (PVC) piping material, which has been identified as containing carcinogenic material, include: high-density polyethylene (HDPE); polypropylene; cross-linked polyethylene (PEX); vitrified clay; concrete; Acrylonitrile Butadiene Styrene (ABS); copper; steel; and iron. Connection to a municipal sewage system is allowed for the project, but only provided that the system has a biological treat-
ment process without chemicals, is within 500 metres or in the same watershed as the project, and treats water to tertiary levels with return of the water to the project. In that case, the project must show a balance between water inputs and outputs; must not put an additional burden on an existing combined sanitary and storm system; must not be separated from the plant by a lift station; and must include all energy requirements (production and pumping) into the equation.
gas emissions. In principle, these 660 tonnes
The price of carbon and the opportunity for innovation
Transforming industry into an environmental regeneration advocate
Carbon pricing will change the approach to design from system to system. The water treatment plants (regardless of scale or type) can be used to reduce the peak energy demand, and the water treatment operations can be turned on during times of low energy demand to reduce energy cost. The integration of these systems at the building level will facilitate the integration of renewable energy technologies that are usually less reliable. The City of Yellowknife’s water utility stations have been responsible for 21 per cent (660 tonnes) of the City’s greenhouse
of emissions equal a $30,000 annual carbon tax based upon a price of $50 per ton for carbon emissions that could emerge from Federal legislation. Carbon pricing will bring radical changes in how systems are designed, which will demand more innovative designs and the creation of “systems of systems” that inherently function as part of a big environmental re-generation machine.
The LBC allows for exceptions, provided
they help the industry shift slowly toward more sustainable practices. If the municipality requires that all buildings be connected to a municipal potable water supply, the design team must demonstrate that their drawings were submitted to the authorities having jurisdiction and that all regulatory appeals, short of legal appeals, have been exhausted. The intent of this is to create advocacy capacity for greener practices within the construction community. S
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15
Between a honey-bag and lagoon:
Potential Decentralized WASH solution for remote/Indigenous communities The issue at hand
communities. The application of de-cen-
centralized services. Here, we propose a
Most urban drinking water and waste-
tralized or on-site WASH infrastructure is
broad framework for the development of
water infrastructure employs centralized
not new in its application and has provided
de-centralized WASH infrastructure for
systems, which consist of piped collection
a means for cost effective development in a
expanding communities, with a focus on
and conveyance systems for wastewater
rural southern context for decades.
remote Indigenous northern communities.
and water. Similar systems have been adapt-
De-centralized wastewater infrastruc-
ed for the far north and installed in certain
ture has been gaining more attention given
communities. However, the cost of these
its relatively low capital and potential op-
systems, particularly the construction cost,
erational savings when compared to cen-
rent WASH solution is trucked water and
remains a very expensive means of provid-
tralized systems. Additionally, recent stud-
sewage. Sewage is most often disposed in
ing adequate water, sanitation, and hygiene
ies have estimated that the greenhouse gas
lagoons, resulting in the loss of potential
(WASH) infrastructure to remote northern
emission (GH) reductions for de-centralized
for resource recovery. Here, we suggest an
systems are at least 40 per cent less than
alternative to the present management of
Shifting the paradigm
In most northern communities, the cur-
household wastewater in remote northern communities (Figure 1). Decentralization The core piece to our proposed WASH framework is based around decentralized energy and nutrient recovery from wastewater for remote communities. While this can look different across communities, the concept is simple: investing in smaller community-scale recovery systems, giving communities the ability to treat wastewater on-site to potable quality if need be. Such an approach eliminates the need for transporting wastewater to lagoons or treatment plants. Rather, the contents from toilets are conveyed to a small community anaerobic digester for methane energy production and struvite (ammonium-magnesium-phosphate) nutrient recovery for local agricultural uses such as green houses. Source diversion By using a resource-recovery decentralized approach we will have the freedom to more easily implement household sourcediversion of toilet/food residual “blackwater� from other washing-generated (greywater) household wastewater. There is a growing awareness that source-diversion of Figure 1 – R isk (Hazard, Exposure & Vulnerability), Resilience (Hazard, Exposure & Intrinsic Resilience)
16
The Journal of the Northern Territories Water & Waste Association 2018
wastewater allows for more efficient treatment -- blackwater contains nutrients (ni-
By David C. Shoults & Nicholas J. Ashbolt, University of Alberta
WASH
cover the energy required to operate a local treatment facility but generate excess heat/ power. With this shifting paradigm and innovation in the field of sanitation, the use of waterless toilets is not only feasible, but provides tangible advantages. A waterless toilet (Fig. 2) provides home owners with a toilet solution which does not require any piping in or out. After use, contents in the toilet are sealed into an air tight, biodegradable film which can be emptied every few days into a community digester (along with food residuals), which then provides power for this community function. Figure 2 – Dynamic framework for planning and implementing resilient infrastructure
Greywater treatment, reuse, and heat recovery
to reduce greenhouse gas emissions where
Supplying large amounts of potable
biogas (methane), while greywater has good
possible. We have also realized the oppor-
water to remote northern communities for
potential for heat recovery and water reuse.
tunity to produce nutrients for the growing
all household uses is very costly; but what
Greywater from washing and laundry, which
interest in local food production in com-
if we could reduce the amount of water
accounts for approximately 70 per cent of
munity greenhouses. Advanced blackwater
needed while increasing the amount of
traditional domestic wastewater, is more
treatment through anaerobic digestion (AD)
water available for use? By treating greywa-
readily treated to enable fit-for-purpose
for methane recovery is a net-positive pro-
ter to a level fit for non-potable reuse, im-
reuse than toilet/food residual blackwater.
cess which has the capacity to not only re-
porting water for household uses could be
trogen and phosphorus) and produces local
Recent improvements in compostable self-sealing bags within toilets (such as in the Loowatt, Figure 2) allow for easy and safe collection of nearly all the nutrients and biogas substrates generated within a household. Hence, separating blackwater allows for greywater collection within homes and treatment for use as wash water. Treating greywater for safe reuse is critical but readily achievable with a range of approaches at the household level. Overall, handling separate wastewater streams within homes allows for more efficient treatment and resource (heat, nutrient, and water) recovery and could provide safe wash-water to re-
IMAGINE IT. DELIVERED. Our integrated services provide cost effective solutions for the planning, design, construction and management of water and wastewater facilities and system infrastructure across northern communities.
duce the burden of microbial diseases. Advanced biosolids treatment With our changing climate, there has
aecom.ca
been an increased awareness of the need The Journal of the Northern Territories Water & Waste Association 2018 1501 - NTWWA_4.625x3.375_2017.indd 1
17
7/13/2017 12:13:02 PM
WASH reduced by 70 per cent, depending on end-
there is an opportunity to create new jobs
paradigm on wastewater, many people are
uses. The benefits are twofold: less energy to
and put the ownership of water distribution
neither comfortable with, nor aware of, di-
produce potable water and minimal genera-
back into the hands of these communities,
rect treatment/reuse of greywater. There-
tion of wastewater (e.g. no need for lagoons).
where community members are not relying
fore, community consultation, focus groups,
on external sources for their water.
and ongoing education are essential first
Additional considerations
steps, not last steps, for this to be successful.
The final step needs to come first
It is essential that government bodies and
With the advancement of water treat-
munities to co-create a solution suitable for
maintenance costs, accessibility, climate,
ment technology in recent decades, efficient
each community. Water is the most impor-
and community capacity must all be con-
treatment of greywater to potable quality
tant resource we have; it is important for the
sidered. Decentralizing will require a change
exists; however, there is a potential social
public to understand how it is managed and
in industry as individuals trained to operate
barrier if communities are not engaged with
what risks are involved. However, it is equally
these treatment facilities are needed. Cen-
deciding on a reuse strategy. Historically,
important that those seeking to implement a
tralized treatment facilities have the obvi-
First Nations, Metis, and Inuit communities
solution are aware of the needs of the com-
ous advantage of being able to handle all
have rarely been engaged in the design pro-
munity. Ultimately, treating our wastewater
the wastewater in one facility, thus simplify-
cess and instead have been provided with
as a resource and co-creating with stake-
ing the process in many ways. However, by
solutions that may not have been appropri-
holders is an important next step to a more
decentralizing wastewater treatment plants,
ate for their communities. With the current
sustainable future. S
Of course, implementing a new para-
digm of WASH infrastructure is easier said than done. Capital cost, operation and
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The largest solar array in Manitoba will offset the power required by the plant, helping the community move away from the diesel fuel that creates the contamination issues that the plant is also helping to resolve. Photo credit: Boke Consulting
Northlands Dënesųłiné First Nation sustainable wastewater treatment plant “The North is the North,” Ken Mattes begins. “You get down to 40-below, you discover all sorts of things that can go wrong.” Mattes is the long-time Manitoba coordinator for an Indigenous Services Canada (formerly INAC)-funded, West Region Tribal Council-facilitated circuit rider program, working with wastewater treatment operations on First Nations. “Northlands [Dënesųłiné First Nation] had a Sequencing Batch Reactor-based mechanical system with a lot of problems thanks to the cold.” Mattes rattles off a laundry list of issues: balancing sludge, pipes that had overheated and melted, even a door that didn’t close right that had let in freezing cold air. Northlands knows cold – located at 58° 36’ N on the shores of Lac Brochet, even the average winter day features temperatures near -30°C. There’s a tendency to view the cold as an added complica-
Cutaway view of a SAGR. A: Plastic liner preventing infiltration covers the sacrificial walls. B: Influent distribution chamber. C: Clean stone provides surface area for nitrifying bacteria. D: Linear aeration system creates fully-aerobic conditions. E. Effluent collection chamber. Photo credit: Nexom
20
The Journal of the Northern Territories Water & Waste Association 2018
tion, and to contend with it, additional systems must be put into place. But as Mattes speaks, it becomes clear that the solution involves not more complexity, but increased simplicity and sustainability.
Simplicity
“Simple in maintenance and simple in operation,” agrees Liliya Chunderova, speaking of the new Northlands Dënesųłiné First Nation wastewater treatment lagoon she and her colleagues at Tetra-Tech designed. Even the process train is simple: “A new lift station, a new force main, the two aerated lagoon cells, followed by two SAGR cells discharging continuously.” Chunderova is referring to Nexom’s Submerged Attached Growth Reactor (SAGR) post-lagoon cold water nitrification system, a madein-Manitoba innovation. The SAGR is an in-ground, fully-aerated, horizontal-flow rock media bed that uses a patented process to grow multiple sets of the biomass that reduce ammonia in wastewater to non-detect levels, even in lagoon effluent that can fall below 1°C. “In the extreme cold conditions at Northlands, a facultative lagoon would need a bigger footprint and still wouldn’t meet Wastewater Systems Effluent Regulation (WSER) requirements,” explains Chunderova, “but an aerated lagoon with SAGR for nitrification will.” “The ease of operating and maintaining a SAGR really sets it apart,” says Mattes. “If you get into Level 3 plants, you need two years of post-secondary education just to operate it. But with the SAGR, the sewage goes into the lagoon, and clean effluent comes out with very little effort.” The SAGR is an in-ground, fully-aerated, horizontal-flow rock media bed that uses a patented process to grow multiple sets of the biomass that reduce ammonia in wastewater to non-detect levels, even in lagoon effluent that can fall below 1°C. Yet what truly sets this treatment plant apart – possibly from any other on earth – is the SAGR’s role in enabling the community to achieve greater sustainability.
By Philip Wiebe, Marketing & Communications Manager, Nexom
Sustainability
DENESULINE FN, MANITOBA
of consumable carbon filters [for the leachate], we will be able to
break down the diesel and associated chemicals and return the “Northlands is one of four Manitoba First Nations dependent on cleaned groundwater back to the ecosystem,” Duggan says. He and diesel for power, and they hate it,” says Bruce Duggan, owner of Boke Consulting, a green-energy consultant on this project. others involved believe that the dual-purpose wastewater and diesel Getting sustainable is a big part of the new wastewater treatcontamination treatment system used here is indeed the first time it ment plant on two fronts. The first is offsetting the site’s power has been done anywhere. draw through a 282-kilowatt solar array. “It’s the largest such array in Ultimately, credit for the innovative plant belongs to the comManitoba,” says Duggan, “with over 1,000 solar panels, each measurmunity. ing one metre by three metres.” During the long summer days, and “In southern communities, you face a lot of skepticism,” says even in the shorter days in winter, the solar cells will help power Duggan, “but in Northlands, people are determined to take care of Northlands’ grid, contributing enough energy to offset the 270,000 their lands. They’ve lived here for thousands of years. We did not kilowatt hours per year it will take to aerate the plant’s lagoons and have to convince anyone of anything.” SAGR. 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Emerging climate change issues and challenges for water systems in the Arctic Introduction
info@ramtech.ca
22
www.ramtech.ca
The Journal of the Northern Territories Water & Waste Association 2018
Many factors influence the engineering practices associated with water infrastructure in the Canadian Arctic. These factors include the extreme cold conditions that infrastructure must withstand, ground-related conditions, extreme construction, operation and maintenance costs, the short construction season, challenges of transporting construction material, delays in procuring specialized equipment, and an undersupply of labour. It has been observed that Arctic water is abundant, but in short supply for communities that require a clean source of water yearround. Ten-month winters, by themselves, limit water supply because water can freeze to a depth of two metres. The Arctic is also a desert with some most regions receiving less than 250 millimetres of annual precipitation, falling mostly as snow. Water treatment processes have become complex with the application of membrane technology, which involves high capital and operation and maintenance costs. This technology is generally designed for “targeted� treatment, which may not be easily adjusted to accommodate changes in the source water quality. Ongoing research is showing that climate change is altering the fragile thermodynamic relationships of northern ecosystems by shifting the seasonal transitions, and altering precipitation regimes, including the rainfall events and the snowfall accumulations. Snowmelt is a crucial source of water for shallow Arctic lakes, and snowfall is projected to decrease in some regions. What this means is
By Ken Johnson, AECOM
WATER AND CLIMATE CHANGE
that the targeted treatment systems may be unable to achieve the required water treatment because of changing conditions. A recent compilation of specific occurrences potentially related to climate change issues for water and sewer systems (NWT and Nunavut) identified 17 occurrences. Of these 17 occurrences, 11 were associated with water supply and treatment, and seven of the 11 were associated with water quality.
Attributes of water infrastructure not suited to change
The water infrastructure in the Arctic has three significant attri-
butes which cause limitations for climate change adaptation. The attributes are design life, a non-portable configuration, and complexity. The design life limits the infrastructure because it is designed to last a generation (20 to 30 years), which means that a community is burdened with whatever infrastructure is built for a 20- to 30-year period, with limited or no opportunity for changing the infrastructure. The non-portable attribute limits the infrastructure because it
Water treatment, storage and truckfill facility in Cape Dorset Nunavut
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WATER AND CLIMATE CHANGE has a fixed location with a limited possibility for relocation. The final attribute is associated with the complexity of the design, and operation and maintenance. With these complexities, issues may develop with time that may be expensive and time consuming to correct. This is particularly true with the “modern” water infrastructure that has emerged which requires the application of complex technologies. These three attributes do not align well with climate change because by its very nature climate change is creating an increasingly dynamic natural environment that the water infrastructure must respond to. Water infrastructure operation and maintenance in the Arctic can be difficult enough with “normal” day-to-day functioning, and quite likely very difficult, to impossible, with the anticipated changes in the quality and quantity of water. A changing climate presents additional challenges to the design, development, and management of water infrastructure in the Arctic. Water infrastructure is “climate sensitive” because it is designed, built, and operated so as to provide useful service over decades within a range of site-specific criteria. The current water infrastructure − and the infrastructure that will be built in the next few decades − will be subject to climate conditions outside of historical experience, with changes likely intensifying over time. All infrastructure systems carry some risk of failure. However, unanticipated, and rapid, changes in the operating environment may increase this risk and overwhelm systems’ coping capacity, with related financial losses, and health and safety risks.
Water engineering practices associated with climate change
The lack of system “redundancies” or backups, and the isolation of Arctic communities are key features that differentiate infrastructure systems in the Arctic from systems in the south. In the event of infrastructure failure, northern communities may not have access to the benefits of options that many southern communities take for granted, such as simple and convenient community access, piped and looped water systems, and local problem-solving resources. This lack of options in emergency situations may require the mobilization of considerable resources, at great expense, to address an issue. For example, Arviat, Nunavut had a significant leak in the water reservoir, which prompted the need for an emergency water supply because a winter repair was not possible. After the consideration of alternate freshwater sources, it was concluded that seawater was the only reliable solution. This required the quick and expensive mobilization of a reverse osmosis treatment system. A northern water engineering manual Good Engineering Practice (GEP) for Northern Water and Sewer Systems was originally
24
The Journal of the Northern Territories Water & Waste Association 2018
Water storage reservoir in Chesterfield Inlet, Nunavut
published in 2004 by the Government of the Northwest Territories’ Department of Public Works and Services. GEP highlights the conditions for Arctic water infrastructure which often require a different approach to design than what is commonly applied in the south. GEP has been revised and published as a second edition, and the revision includes a list of climate change influences associated with the engineering of water systems in the Arctic, along with several reference documents for further consideration. There are planning reports addressing climate adaptation that have been developed for many Arctic communities, but water infrastructure is only highlighted in the context that change will likely occur, and adaptation will be needed. Ultimately the adaptation of water systems to a changing climate will be the responsibility of the individual communities, with the support available from the senior governments.
Closure
It is anticipated that the warming Canadian Arctic climate will influence the quantity and quality of community water. A significant number of Arctic communities are already experiencing water issues that may be related to climate change. The most recent climate change report stated that the entire Arctic Ocean could be largely ice free, in the summer, as early as 2030. Arctic temperatures are rising twice as fast as temperatures in the rest of the world, and, in the fall of 2016, mean temperatures in the Arctic were six degrees higher than average. In response to climate impacts on water infrastructure, resiliency may be more appropriate than redundancy. Historically, the application of redundancy has meant having “more of the same” in order to be in a position to respond to critical facility issues, whereas “resiliency” refers to the ability of such infrastructure systems (including the interconnected systems and social systems) to absorb disturbance and still retain their basic function and capacity. Most Arctic communities currently have a limited capacity for dealing with water issues, whether they are technical, financial, administrative, or human resources. Contrary to this limited capacity are the increasing demands on these same resources which are being driven by increasing regulatory demands and increasing sophistication in the technology associated with water in the Arctic. Climate change will demand new approaches to juggle these contrary issues. S
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Boring in Qaanaaq.
INFRASTRUCTURE RESEARCH IN QAANAAQ, GREENLAND Introduction
Qaanaaq is the world’s northernmost
community with an indigenous population, and Greenland’s poorest, with an average income markedly lower than the national average. The primary business is still the hunting of marine mammals and polar bears, but the hunt is challenged by climate change, and it is becoming still more difficult to sell skins and ivory due to international regulations. To supplement their income, hunters are increasingly turning to fishing for halibut,
but the infrastructure in the district is completely insufficient to support this necessary conversion. Thus, in recent years, there has been a focus on improving Qaanaaq’s infrastructure and the living conditions of the inhabitants. In 2017, the Arctic Technology Centre (ARTEK) was responsible for a series of research projects in Qaanaaq, which were carried out in cooperation with several partners. Their work included two months of field work in the community of Qaanaaq (620 inhabitants) and two of the district’s settlements.
The research was financed by the Greenlandic Self-rule Government, the national power- and water-supply company Nukissiorfiit, and the Technical University of Denmark, and completed in cooperation with Qaasuitsup Kommunia (the municipality). The projects regarding water supply also received economic support from the Nordic Atlantic Cooperation (NORA).
Permafrost issues
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ever, is situated on sediment, containing permafrost, in an old riverbed, and consequently, many buildings are damaged due to settling foundations. A systematic analysis of the geotechnical conditions in the area has never been carried out, and thus there is not sufficient knowledge about what kind of foundations buildings should have constructed in order to avoid damage from ground movement, or where the community may be expanded to minimize this issue. This is why a series of geophysical measurements and excavations were completed in and around Qaanaaq. Simultaneously, several holes, up to 20 metres deep, were bored and thermal sensors installed to monitor future thermal developments. The goal is to uncover the structure of the geology, map the ice contained in the ground, and assess how far much below the surface the bedrock is located.
Qaanaaq, Greenland
Collecting ice bergs for melting.
Limited water supply
The river in Qaanaaq contains only enough water to meet the community needs for about four months of the year. During this period, Nukissiorfiit also fills two water containers, each holding 2,000 cubic metres, which provides enough water for the community needs for the following four months. During the last four months of the year, Nukissiorfiit collects ice from icebergs trapped in the sea ice and melts this ice in a special melter connected to the water works (See article in 2017 edition of the Journal). This period when the water is being produced by melting sea ice is exactly the same time as the first sales of halibut. The lack of sufficient, economically priced water limits both the factory’s processing and first sales. Simultaneously, the sea ice is getting thinner due to climate change, which makes collecting icebergs more dangerous.
Qaanaaq reef at low tide with supply ship off shore.
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Qaanaaq, Greenland Additional water storage
An assessment of the possibility of ex-
tending the period when water is obtained from the river and finding a suitable location for the placement of two new large water containers were also included in the project. In the fall of 2017, Nukissiorfiit decided to establish two new water containers of 2,000 cubic metres each, which increased the total amount of water which could be stored to 8,000 cubic metres. The challenge of this decision is that it will only cover the community’s current annual water consumption, not what future needs are estimated to be. Partly, the problem is that Qaanaaq has the lowest per capita water consumption in Greenland, at just 40 litres per person, per day, when the national average is more than 100 litres per person per day. The low
consumption in Qaanaaq is largely because houses are not connected to a piped water supply system. The other problem is that a winter capacity of 8,000 cubic metres for four months is not enough for consumption by the households and the processing of fish in the community Added issues that must be considered are that the fishing for halibut is increasing, and there is massive unemployment in the community.
Reverse osmosis water treatment or additional storage
Currently, Nukissiorfiit is considering supplementing the winter water supply with a reverse osmosis facility. The issue with this is that 300 metres outside the city is a reef, and the city’s grey waste water is released
onto the land and ends up on the community side of the reef. Also, honey bucket bags are left at the community dump, which leads to black waste water (fecal matter) leaking out to sea and concentrating inside the barrier formed by the reef. This means that every winter, a salt water intake line would have to be placed well past the reef to ensure reasonably clean seawater. This would be complicated due to the large ice movements caused by the reef. In consideration of the saltwater supply issue, the researchers recommended that the two new 2,000-cubic-metre water tanks being considered be replaced with 3,000-cubic-metre ones instead, because this option will be cheaper in the long run than installing an extra 2,000-cubic-metre tank in the future. S
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nunatta@northwestel.com 867-979-1488 www.nunatta.ca 28
The Journal of the Northern Territories Water & Waste Association 2018
Cold Regions Engineering – New Manual of Practice
cold regions manual
By Jaime D. Goddard, Department of Municipal and Community Affairs, Government of the Northwest Territories The Cold Regions Utilities Monograph (CRUM) was first published in 1979, and the current edition in 1996. It has been a mainstay of cold regions utilities design, covering topics such as planning, geotechnical considerations, drinking water systems, wastewater, solid and hazardous waste, fire protection, and energy management, with a focus on the challenges specific to the design of water, waste, and power systems in the circumpolar regions, Advances in research and technology, further practical experience in the operation of northern systems, and changes to government funding arrangements and operator training over the past 22 years mean that it is now in dire need of revision. Luckily, an update is now underway. Spearheaded by University of
Alaska professor Aaron Dotson, the revision team includes both Canadian and American contributors from private industry, academia, and government. Several meetings have taken place to determine what should be cut, updated, combined, or moved, with the intent of narrowing the book’s scope to more specifically address cold regions issues and remove general design methodologies when they are the same as southern practice. Although the current book is a monograph, the new version is anticipated to be reformatted as a manual of practice. Writing and editing are currently underway, and publication of the new edition is anticipated to be in 2019. When complete, the updated manual of practice will incorporate
recent research and experience gained in the field of cold regions engineering since the previous edition, as well as updating outdated information on pricing, available materials, and appropriate technologies. It will be available for purchase through the American Society of Civil Engineers (ASCE). The team is looking for reviewers with cold regions utilities experience to form a Blue-Ribbon Committee for review of the revised chapters, with the intent of having each chapter reviewed by both a Canadian and an American reviewer to ensure both jurisdictions are properly represented. Anyone interested in becoming a reviewer should contact Aaron Dotson at addotson@alaska.edu. S
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Cape Dorset – depollution training.
Cape Dorset metal management project Solid waste is a challenge across most remote northern Canadian communities. Dumpsites in northern communities were often located out of convenience at a time when there was far less population, and far less waste per capita. These dumpsites predate current environmental regulations and are a burden on the communities. A report prepared in 2014 by EXP for the Government of Nunavut presented a clear picture that metal waste in Nunavut is a large problem. In 2017, a demonstration project was
launched in Cape Dorset to clean-up the metals dumpsite through a communitydriven, train-the-trainer model led by Qikiqtaaluk Business Development Corporation (QBDC). QBDC, a subsidiary of Qikiqtaaluk Corporation (QC) is the development arm of Qikiqtani Inuit Association. Through this structure QBDC represents the approximately 14,000 Nunavut Inuit in the Qikiqtani Region. This project brings a multi-level government approach inclusive of federal, territorial, municipal governments, and the Regional Inuit Organization.
Cape Dorset – baling training.
30
The Journal of the Northern Territories Water & Waste Association 2018
The project structure is such to maximize local and Inuit training and employment and to build capacity at the municipal government level with support from their Regional Inuit Organization (QC & QBDC in this project instance). The 2017 summer was a great success! The project provided funding to the municipality to subsidize the wages for six new casual positions devoted to the clean-up of the metals dumpsite. Six Cape Dorset residents were hired and trained in the health and safety aspects, and hands-on knowledge transfer for safe removal, handling and packaging of hazardous waste from waste metals. Scout Environmental supported the training of depolluting end-of-life vehicles and white goods. By the end of the summer, most vehicles at the dumpsite were depolluted and refrigerants recovered from about half the fridges and freezers. This was all completed in only a few short months of hard work. The next step was to compact the metal and prepare it for future backhaul for recycling. The Government of Nunavut made available their metal baler through in-kind project support. After two weeks of intense training, a local equipment operator was ready to start tackling the metal pile and in a few short weeks had baled about 600 tonnes of metal! A late spring and equipment repairs de-
By Justine Lywood and Erin Mentink, plusArctic
layed the start-up of the baling work for the 2018 season, but that hasn’t stopped the project from moving ahead. This year, QBDC and the municipality are working together to expand the scope to include a community clean-up to remove the derelict vehicles scattered around the hamlet and bring them to the metal dumpsite for depollution and baling. These derelict vehicles not only have negative visual impacts, they also pose a safety and environmental concern. The desire for the community clean-up is driven in part by the exciting upcoming opening of the Kenojuak Cultural Centre and Print Shop. Cape Dorset has a thriving arts scene, and it is anticipated that with the opening of the Kenojuak Cultural Centre, tourism will see a considerable increase. The derelict vehicles are an eyesore and detract from enjoying the scenic community and encouraging tourists to walk around and meet the local artists as they work outside their dwellings. The community cleanup will support Cape Dorset in presenting an image that reflects the community – opening, welcoming, and inspirational. The project in Cape Dorset is a demonstration of a new approach to delivering
Cape Dorset , nunavut
projects that truly prioritize capacity building
Canada, Government of Nunavut Commu-
and a social return on investment. This proj-
nity Government Services, Department of
ect scope has evolved, reflecting the unique
Environment, and Economic Development
needs of the community, and has supported
and Transportation, Qikiqtaaluk Corporation,
the municipality to drive the project priori-
Kakivak Association, and the Municipality of
ties.
Cape Dorset. Most importantly, this project
Conversations are ongoing on ways to
would not have been successful if not for the
deliver a similar structured project in all
dedication and hard work of Steven Pooto-
Nunavut communities. The delivery of this
ogook, Ashoona Ashoona, Pitseolak Koom-
project has been made possible through the
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31
Taloyoak water treatment facility
Working toward water resilience in Taloyoak, Nunavut The design, build, and installation of a package water treatment plant always presents challenges, but few can match the project completed in Taloyoak, Nunavut. While water system resilience is still an evolving term in the far north, the Government of Nunavut has taken a leadership role in working to provide the northernmost settlement on mainland Canada with a self-contained, environmentally- sound, water treatment plant. The project objective was not only to generate clean water all year round, but also foster local development and reduce contributions to climate change. The village of Taloyoak is an isolated community of 700 people located on the shore of the Arctic Ocean at 69O 32’ north
latitude, 2,000 kilometres north of Edmonton. This distance creates accessibility challenges, in addition to challenges associated with the extreme cold. Added to these challenges were a “Triple Bottom Line” objective established by the Government of Nunavut. Usually cost is paramount, but the Taloyoak water treatment project also had equal weight given to social and environmental considerations. The Government of Nunavut requested a design with a minimal impact on the fragile northern environment. Since there are no roads to Taloyoak, construction materials arrive each September on the annual sealift. An alternative − but considerably more expensive − delivery method is air freight, but this has significant
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The Journal of the Northern Territories Water & Waste Association 2018
size limitations. To further complicate matters, power generation in the high Arctic is normally provided by diesel generators, which means that fuel must also be transported to the community on the annual sealift. To cut fuel emissions, reduce fuel supply costs, and meet the project’s environmental “bottom line”, the project team wanted to reduce dependence on diesel generators as much as possible. In response to these objectives, solar and wind energy were selected as the primary power sources, since they are renewable and non-polluting. A four-point approach was taken to utilize the advantages that each potential power source has to offer. The alternative sources of power for the community were community diesel-generated power, an onsite diesel generating system, solar power and wind power. The community diesel generated power provides added stability to the system, and a power supply for the periods without sun or wind. The onsite diesel power system is inside the water treatment plant and provides additional resiliency for emergency power. The solar power component of the plant consists of 48 photovoltaic modules, 175 watts each, mounted on four support poles. Each bank of 12 solar modules is con-
By George Thorpe, BI Pure Water and Ken Johnson, AECOM
trolled by a sun-tracking device, allowing them to continuously follow the sun at an ideal angle. The combined solar modules have a total power rating of 8.4 kilowatts (kW), which, on a sunny summer day, produce nearly 40 kWh (kilowatt hours) of power. Some of the solar power will be used to charge a battery bank made up of 48 batteries installed in the building. By using solar energy rather than relying solely on diesel generated power, more than 130 tonnes of carbon dioxide are not discharged into the environment each year. The entire onsite power consumption is 60 kWh per day, which translates into two-thirds of the total power supply potentially coming from solar energy. To supplement the solar system, a small wind turbine was installed on a 21-metretall tower. Based on a mean wind speed in Taloyoak of approximately seven metres per second, the estimated wind power is 1.75 kW. Wind power generation does fluctuate, depending on wind speed and other variables, however, combined with energy storage batteries, it may provide a steady source of power. The raw water supply for the treatment plant is Canso Lake, a 20-hectare lake 3.2 kilometres northeast of the community, which is seasonally recharged during the spring runoff. Despite ice thicknesses on the lake that may exceed two metres, the insulated and heated intake pipelines do not freeze. The water treatment system process itself utilizes cartridge filtration with a 20-micron initial filter followed by a one-micron filter. Supplemental chlorination is used for disinfection and to provide a residual level of chlorine for the trucked water delivery system. Providing Nunavut residents with relevant job skills was another key aspect necessary to meet the project’s social ob-
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Taloyoak, Nunavut Operation of truckfill system at Taloyoak water treatment facility
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The system provided alarm reporting and data monitoring, as well as trending of important parameters such as chlorine levels, pressure differentials, pump speeds, flow, alarms and outputs from the turbidity and chlorine analyzer instruments. This information is available on computer screens in the Taloyoak operator’s office, and at southern locations through the power of the internet. Ongoing training has been one of the results of using this system, with contractor resources available to help the operator diagnose problems in real time. The water treatment system has been providing clean, safe water to the people of Taloyoak; however, operating alternate energy systems has been challenging because specialized maintenance knowledge is required. The alternate energy systems have had considerable downtimes as the “hiccups” of the new technology are worked through. Despite these hiccups, the Taloyoak water treatment facility is raising the bar for facility resiliency of water treatment systems in Nunavut. S
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The Journal of the Northern Territories Water & Waste Association 2018
Solar panel for water treatment facility in Taloyoak
NTWWA president’s report
NTWWA President’s Report
olivia lee
To my friends, colleagues and members, it is my pleasure to write
As a not-for-profit organization, our success depends on the
to you as the President of Northern Territories Water and Waste As-
generosity of our sponsors, and I would like to express my deep ap-
sociation (NTWWA). Having participated with the organization for
preciation to those sponsors. In addition, thanks to our conference
over 10 years, it has been an honour to watch its continued growth.
planning committees, as well as Gerry Gusdal and Jean Soucy, for
I am grateful for this opportunity and deeply appreciative of the
ensuring the operator’s workshop was a huge success.
strong support provided by all our NTWWA members. I would like to
Thank you for your continued support of the NTWWA. With our
thank our members for making efforts to engage new members and
continued effort, this organization can continue to thrive and grow.
reconnect with those individuals whose membership has expired.
We are always looking for new and creative ideas to provide the best
Over the past year, our association introduced a scholarship fund offering a training grant award and a campaign grant award each with
possible service to our membership. We welcome your thoughts and feedback.
an award amount of $1,500. Congratulations to the Iqaluit Inuksuk
We look forward seeing you in Yellowknife in Novem-
High School’s Green Club, who are the very first recipients of the
ber 2018. For additional information, please visit our website
campaign grant award. They will be hosting their first water and
(www.ntwwa.com). S
waste symposium with the funding. The association is happy to support such a great initiative, and we wish them luck. Applications for the next round of scholarship funding can be found on our website and will be accepted until June 28th, 2019. Thank you to everyone who was able to attend the 2017 conference in Iqaluit, Nunavut. Though economic times are tough, we had a full roster of 18 presentations, seven tradeshow booths and 60 delegates, of whom 24 participated in the operator’s workshop. For the past few years, we have been lucky to welcome the participation of delegates from Greenland. They have been able to share with us some of the interesting things they are doing in the area of waste management, and we look forward to their continued participation.
The Journal of the Northern Territories Water & Waste Association 2018
35
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