Dhaka Tannery Transformation

Page 1

WATER + INFORMAL

vehicle+package purification

mobile tanker 0.5 TK / L

warehouse

standpipe 0.018 TK / L 1643 * 100 H

filling

storage

delivery

32%

filtering 3000 TK

68%47%during hazardsformal

90%

30% boiling 1000 TK

tap water POTABLE

cosumption

direct use hand pump 0.05 TK / L or free 2830 * 75 H

0.05

tubewell 40,000 TK

USER

10% filter

deep groundwater

tap water resell

0.006

transportation

tap 0.006 TK / L 325,717 H 2246301369 L/D

30%

jar 0.018 TK / L

20%

20%

80%

treatment

pipe

67% 33%

bottle

reservoir

shallow groundwater groundwater 3MLD/t 400 TK / LD

tank private reselling

0.006 TK / L

80%

78% obtainment

investment

400 TK / LD

EXTRACTION

purification cost 0.006 TK / L

23.8%

90 TK / LD

22%

65% 35%

surface water 299.1MLD/p 90 TK / LD

1.5 0.5

tanker

13 TK / L

44.2%

rainwater

vendor 13 TK / L 4826 L/D jar to door 1.5 TK / L

80% 10%

slum

jar *DWASA Annual Report 2012-13. 2013. p64 http://en.wikipedia.org/wiki/Water_management_in_Dhaka#cite_note-Khan-1 Uddin & Baten. Water Supply Of Dhaka City: Murky Future. 2011 Hall. Bangladesh - Water - Union initiative in Dhaka water service.2010. Khan.Dhaka Water Supply and Sewerage Authority: Performance and Challenges. 2010. Water Security in Dhaka City http://bikroy.com/en/electric-kettle-for-sale-dhaka-1

auto pump 0.05 TK / L or free

borehole

I. The local water authority DWASA is getting much better in covering water supply. II. Water source is the problem. Ground water source from aquifer is depleting, DWASA is relying more on surface water source. III. Where service is not covered the informal business find innovative ways to fill the gay. The informal sector has an important portion in nearly every industry.

100% tubewell + well water

peri-urban

RAN YANG // KIERAN / TIMBERLAKE / DHAKA / MAY 8, 2014 / FINAL REVIEW


BURIGANGA

Buriganga river smells, it’s heavily polluted water that does not support any fauna or flora with a 0 DO level. The BOD exceeds 5 times of a living water ecology.


EFFLUENCE 600,000

Total load (kg/d)

500,000 400,000

60%

300,000

Load in kg/day

200,000

40%

100,000

Industrial effluence

Domestic sewage discharged Domestic sewage retained

0 2006

2010

2015

Computed BOD Loadings of All Industrials Clusters

Sewage water was dumped into river. Tannery, garment and chemical industries all dump their effluence directly into river. Industries effluent contributes 60% of water pollution, and the untreated domestic sewage counts for 40%.

Paul & Haq. 2010. Presentation from the 2010 World Water Week in Stockholm


INDUSTRY

Tongi Industrial Area Textile Dying + Chemical Pharmaceutical

214 ha 200 units

3.8 ton BOD /d

Tejgaon Industrial Area Textile Dying+Printing+Composite+Washing +Chemical+Bitumen Emulsion+Insecticide Savar South Tannery Estate

Hazarlibagh Tanneries

80 ha 195 units

295 ha 130 units

66.7 ton BOD /d

25 ha 249 units

46.3 ton BOD /d

12 ton BOD /d

> BOD standard(6 mg/l) Average exceedance of BOD standard (6 mg/l) for water usable for fisheries and suitable for drinking supply after conventional treatment,

76,000 ha 270 units

> 500 % 200 – 500 % Narayanganj Industrial Area 100 – 200 % <100 % acceptable quality 1km

known sewage outfalls

DHALESHWARI

The 4 largest factory clusters inside Dhaka city all located along the 4 river loop, combined with sewage, they makes most part of watersheds dead.

47.5 ton BOD /d

TURAG-BURIGANGA

BALU-SITALAKHYA

http://www.dhakaherald.com/news/business/start-construction-of-savar-cetp-by-in-one-week/. Parliamentary Standing Committee on Ministry of Environment & Forests. 2010. Pollution Abatement Strategies for Rivers and Wetlands in and Around Dhaka City


leather TANNERY

textile DYEING

paper BLEACHING

pH

5

12.3

7-9

BOD mg/L

700-800

800

90-150

15,000-18,000

2,000

400-1,200

3,000-4,500

7,000

700

Cr CHROMIUM 2,500- 3,000

Cr, Pb, Ni, S

Cr, Pb

biodegradable organic compounds (biochemical oxygen demand)

TSS

mg/L

total suspended solids

TDS mg/L total dissolved solids

HEAVY METAL mg/L

Among Dhaka industries, leather tannery, textile dyeing, and paper breaching counts on the most toxic sectors. However, the leather making itself includes the 3 processes, tanning, dyeing and bleaching/liming.


TANNERY INDUSTRY IS RELOCATING. HOW TO UTILIZE AND IMPROVE WATER, WHILE PREVENTING POLLUTION OF THE NEW LOCATION AND REMEDIATING THE OLD LOCATION?


1. [HARZARIBAGH OLD TANNERY] < REMEDIATION

Part of the soil is contaminated by leachate of toxic effluence.


2. [SAVAR SOUTH NEW TANNERY] < PREVENTION

As it is also located right along the Dhaleshwari river, prevention of polluting the clean watershed should be addressed.

1. http://ourworld.unu.edu/en/colours-of-water-bangladeshs-leather-tanneries


3. [LIVING WATER] < RIVER ECOLOGY

As water quality gets better, macro invertebrates like prawn and crab goes back and as keystone species they provide food for Sarus crane and otter, and eats invasive marsh grasses and algae. They also provide income for fishers.

1. AGP/Getty Images. http://www.dailymail.co.uk/news/article-2585932/Fishing-otters-Age-old-Bangladeshi-tradition-involves-harnessing-mammals-like-reindeer-chase-fish-nets.html 2. Arifur Rahman Chowdhury, Sringair, Manikgonj, Bangladesh. http://www.solifestyle.com/2011/04/photo-of-day_21.html 3. http://en.wikipedia.org/wiki/Sarus_Crane


FLEE UP STREAM 6-12 SENSITIVE: BOD

MG/L

MACROINVERTEBRATES - WATER QUALITY TOLERANT: BOD

12-36

MG/L

VERY TOLERANT: BOD

1:HAZARRIBAGH: REMEDIATION

2: SAVAR SOUTH: EFFLUENT CONTROL

3:DHALESHWARI-BURIGANGA: WATER ECOLOGY

As the tannery moves upstream, water quality changes, and fair water macro invertebrate migrates both ways, the river system get alive again.

M

1K

36+

MG/L


1965

First tannery started to operate.

2003

Two main tannery associations agreed with the government that some 150 member-tanneries in Hazaribagh would relocate.

2009

High Court ruled that the government should ensure that the Hazaribagh tanneries relocate outside of Dhaka or close them down.

2014 No tannery has relocated.

• THE DELAY OF RELOCATING OF EXISTING TANNERY IS DUE TO A LACK OF VISIBLE BENEFIT. • AUTHORITY IS PAYING BILLS FOR A NEW CENTRAL TREATMENT PLANT. • TANNERY OWNERS ARE PAYING FOR PROPERTY MORTGAGE ON THE NEW SITE.

1. Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2. A. K. Bhowmik. 2011. Environmental Sustainability vs. Political Decision: A Review of the Bangladesh Leather Processing Industry Relocation Plan.


[HARZARIBAGH OLD TANNERY] - EXISTING

SLUICE GATE 1

PRETREATMENT

2

LAGOON

COLLEGE OF LEATHER ENGINEERING

CONTAMINATED SOIL BURIGANGA

EMBANKMENT

The effluent goes through the lagoon and eventually dumped into Buriganga. The leachate of lagoon has caused the surrounding soil contaminated.

TANNERY

1. Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2. A. K. Bhowmik. 2011. Environmental Sustainability vs. Political Decision: A Review of the Bangladesh Leather Processing Industry Relocation Plan.


1. SUPERFICIAL REMOVAL

Removal of superficial wastes - sludge in lagoons and wastes on dump sites.

2. VISIBLE EXCAVATION

Excavation of the visible soil pollution - buried wastes, organic soils.

3. SOIL POLLUTION

Excavation of the rest of the soil pollution based on chemical analysis.

TANNERIES

4. TOPSOIL REMOVAL

Removal of several meters of topsoil as a remediation work before constructing new buildings.

5. DEEPER SOIL

For deeper soil layers, in situ techniques that treat the contamination in place.

6. CAPPING

Covering the soil with a concrete layer or a foil.

7. PHYTOREMEDIATION

Covering the soil with a concrete layer or a foil.

Pretreatment of the lagoon and contaminated soil.

DUMP SITE LAGOON


DRY SEASON

SLUICE GATE

6 60

0 BOD (mg/l)

1KM

BOD level tops at dry season when pollutes got concentrated in small river volume.

0 J

F

M

A

M

J

J

A

monsoon

S

O

N

D

water level(m)

Jan 21, 2006

Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather Google earth


MONSOON

SLUICE GATE

6 60

0 BOD (mg/l)

1KM

During monsoon, when flood plain got immersed, pollutant was washed further away and contaminates the flood plain soil.

0 J

F

M

A

M

J

J

A

monsoon

S

O

N

D

water level(m)

Nov 12, 2004

Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather Google earth


TANNERY PROCESS

RAW HIDE

pretanning

soaking

de fleshing

liming - de haring

bating

pickling

main tanning

tanning

sammying

sorting

splitting

shaving

WET-BLEU

wet-finishing

re tanning

dyeing

fat liquoring

setting

drying

CRUST

finishing

conditioning

buffing

trimming

plating

finishig

LEATHER

The tannery process consists of the chemical and physical process, cleaning up the rawhide, tanning the hide to refine the surface, dyeing it, and trimming, reconditioning and decorating it to make final leather product.

1, Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2, United Nations Industrial Development Organization - Regional Programme for Pollution Control in the Tanning Industry in South-East Asia. 2000-08-09. “The scope for decreasing pollution load in leather processing (US/RAS/92/120/11-51)”


DISCHARGE

flesh- BOD ings RAW HIDE

pretanning

soaking

COD de fleshing

shav- trimings mings main tanning

tanning

wet-finishing

re tanning

liming - de haring

BOD

sammying

trimmings

BOD dyeing

solid residues finishing

conditioning

salts organic N

SS

buffing

COD

SS

fat

solvents

trimming

pickling

salts chrome + Cr

splitting

fat liquoring

liquid residues

NH3

bating

sorting

COD

H2S

shaving

WET-BLEU

drying

CRUST

finishig

LEATHER

chrome dyes Cr+ setting

CH2O plating

gas discharge

20,000 m /day 3

Various gas, liquid and solid discharge each main stage creates.

liquid discharge solid discharge biodegradable

1, Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2, United Nations Industrial Development Organization - Regional Programme for Pollution Control in the Tanning Industry in South-East Asia. 2000-08-09. “The scope for decreasing pollution load in leather processing (US/RAS/92/120/11-51)”

non-biodegradable


STRATIFICATION + PRODUCTION

MANGO/JACKFRUIT/TAMARID CANOPY: DUST ABSORTION mir

SLUICE GATE

d.

FORMER TANNERY SITE: INDUSTRIAL PARK

r pur

sadar

IN-SITU HERBACEOUS: SCREENING

ghat gabto

COLLEGE OF LEATHER ENGINEERING

li rd.

BAMBOO/PALM PIONEER SPECIES:

new elephant

BACK-EMBANKMENT PONDS: SEQUENCED FILTERING

rd.

d.

nilkhet r

CULTIVATION/ORCHARD

INUNDATED COMMUNITY: DE NUTRITION ADAPTABLE NATIVE COMMUNITY: TOPSOIL REMEDIATION

SEASONAL FISHERY /PADDY FILED SHIPPING CHANNEL

FLOODPLAIN MARSHES: SEDIMENTATION 1KM

1KM

Flood Buffer + Aquatic Water Treatment

1KM

Remediation

Industrial Park + Productive Pods 1. Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2. M.N. Uddin. 2005. The relationship between Urban Forestry and Poverty Alleviation -Dhaka as a case study


DE URBANIZATING [[HAZARIBAGH] MICROBE SOIL CONDITIONING + NITRIFICATION

MACROINVERTEBRATE FISHERY + DE NUTRITION

SUBMERGENT HYACINTHS+ ABSORPTION

EMERGENT SEMIAQUATIC + SEDIMENTATION

water hyacinth

organic

N

N

salts proteobacteria

aman monsoon sow

+ SEDIMENTATION

lpomoea aquatica

live water

+ SCREENING /REMEDIATION

pumpkin

+ RETENTION

FLOOD PLAIN

BURIGANGA

sacred basil

acrostichum aureum

+ ABSORPTION

+ DE NUTRITION

biodegradable effluent

solid residues

cyperus spp

prawn

NH3 jackfruit

boro winter sow eggplant

chrome Cr+

+ NITRIFICATION

cauliflower

fat

clam

algae

trimmings

COD

NH3-N

mango

sunflower

rice

cryptocoryne ciliata

H2S

fleshings

shavings

BOD

crab

actinobacteria

PADDY RICE + RETENTION

SS sagittaria montevidensis

organic

CANOPY HERBACEOUS ORCHARD + DUST CULTIVATION + SCREENING ABSORPTION /REMEDIATION

EMBANKMENT

tannery effluent

CULTIVATION +

LAGOON + DUMP

HAZARIBAGH TANNERY SITE

10 yr RICE + HYACINTHS+

SOIL CONDITIONING + 7

UPLAND

SEMIAQUATIC +

FISHERY +

MOONSON FLOOD

SWAMP 3 0

POST - MOONSON

MARSH

IL TOPSO D RUCTE CONST ND WETLA G

WATER ROUND

domestic sewage

DROUGHT

AQUATIC

Phasing the process of remediation, and creating immediate benefit. Developers, job seekers and residents begin to involve in the process of revenue making and mission achieving. International leather sectors will be more willing to invest in Dhaka. Eventually this de urbanization of the site brings a productive riparian green shore for downtown Dhaka.


2. renewable energy

1.safe/reusable material

3. efficient water

5.waste recycling

4. waste reclaiming

6. safe water


DE FLESHING > CHICKEN BOILER

When trying to apply it to Dhaka, it is really about looking at using and reusing waste. Flesh collected can be boiled as soup to feed chicken, which they are already massively doing.

1. Aninda Kabir Avik. https://www.flickr.com/photos/avikbangalee/sets/72157622415500839/


LIMING <SHELLFISH LIME + > FLOAT RECYCLING

Ca(OH)2 Calcium hydroxide Liming agents can be substitute from shellfish lime and be more efficiently reused inside its own cycle by float recycling.

1. Tonia Sing Chi. http://homescale.wordpress.com/makinglime/ 2. Fattah Khan. https://flic.kr/p/9NLLua


DE LIMING + BATING + PICKLING > ACID COLLECTING

NH3-N Ammoniacal nitrogen

SO42− Sulfate

CH2O2 Sulfate Soaking the leather in acidic liquid and discharge acid effluent.

1. Tonia Sing Chi. http://homescale.wordpress.com/makinglime/ 2. Fattah Khan. https://flic.kr/p/9NLLua


TANNING < TREE

chrome Cr+

tree tannin

Chromium Tanning agents can be substituted using natural tanning agent extracted from bark, leaves and fruit. The effluent can be non-biodegradable

1. Tonia Sing Chi. http://homescale.wordpress.com/makinglime/ 2. Fattah Khan. https://flic.kr/p/9NLLua


DYEING < VEGETATION plant part BARK

Acacia Catechu Deciduous 15m

FRUIT/SEED

Bixa Orellana Shrub 4m

Areca catechu Evergreen 20m

ROOT

PEEL

Terminalia chebula Rubia cordifolia Punica granatum Deciduous 30m Herbaceous 1.5m Shrub 6m

LEAF

FLOWER

Allium cepa Indigofera tinctoria Camellia sinensis Tagetea erecta Herbaceous 0.5m Shrub 1.5m Shrub 1.8m Herbaceous 0.8m

medicine/food

Catechu

Achiote

Areca nut

Haritaki

Maddar

Pomegranate

Onion

Indigo

Tea

Marigold

ORANGE

PINK

GOLDEN

RED

KHAKI

YELLOW

BLUE

LIGHT KHAKI

GOLDEN

dye

BROWN

Dyeing agents can also find native plants to replace. Effluent is biodegradable.

1. Prabartana, Dhaka. Natural Dyeing Information, production and exercise 2. wikipedia.org


FINISHING <> BONDED LEATHER

Leather leftovers are shredded and then bonded back into larger sheets. *

1. http://en.wikipedia.org/wiki/Bonded_leather


QUALITY CONTROL: JUGAAD INNOVATION: CAPITAL:

governmental regulation informal sector domestic and international investors

In Dhaka, the innovative ways informal sectors recycle waste provides lessons for Industrial transformation. Collaborating with bottom-line quality control from governmental regulation and domestic and international investors, Dhaka has potential to lead innovation on green industry.


PRODUCTION CYCLE

SOFTEN HIDE

RAW HIDE

DE FLESHED HIDE CLEAN FLESH BOILED TO FEED CHICKEN IN NARAYANGANJ

TANNED HIDE USING HARITAKI TREE TANNIN

FOOTWEAR MANUFACTURED IN SAVAR EPZ

BONDED LEATHER USING RECYCLED LEATHER PIECES IN SAVAR SOUTH

DYED HIDE USING NAYA BAZAR GROWN VEGETATION EXTRACTED DYES DE HAIRED HIDE

1. Aninda Kabir Avik. https://www.flickr.com/photos/avikbangalee/sets/72157622415500839/


PRODUCTION CYCLE

BALU RIVER

TONGI CHEMICAL INDUSTRIES

CATTLE RANCH

CHEMICAL RECLAMATION

BADDA PASTURE

TANNIN TREE PLANTATION

POULTRY SOUP BOILER

LIME SHELL FISHERY

FOOTWEAR MANUFACTURE

KAUNDIYA ORCHARD

TURAG RIVER NARAYANGANJ CHICKEN FARM

LEATHER BONDING

SAVAR EPZ FOOTWEAR

HAZARRIBAGH SHELL FISHERY

SAVAR SOUTH NEW TANNERY

NAYA BAZAR PLANTATION

DHALESHWARI RIVER

DYEING AGENTS CULTIVATION

Leveraging the waterway shipping river loop. The whole production cycle from cattle ranching to leatherwear can all be ‘Made in Dhaka’.

BURIGANGA RIVER


PRODUCTION CYCLE

Mymensingh poultry farm

Kushtia ranch

85,000 ton

CATTLE RANCH

21,250 ton

*fleshing waste: 2010-2011

POULTRY SOUP BOILER

Khulna shellfishery

Dhaka tannery

Sundarbans mangroves

110 ton

84% wasted

20,400 km

*oyster, mussels and clam

LIME SHELL FISHERY

CHEMICAL RECLAMATION

Rangpur plantation

16,185 km

2

TANNIN TREE PLANTATION

1. http://en.wikipedia.org/wiki/Sundarbans 2. http://en.wikipedia.org/wiki/Rangpur_Division 3. http://en.wikipedia.org/wiki/Port_of_Chittagong

2

DYEING AGENTS CULTIVATION

4.

Chittagong port

Chittagong port

551,000 ton

$500M usd

*leather produced: 2010-2011

LEATHER BONDING

*leather product export: 2010-2011

FOOTWEAR MANUFACTURE

FAO. 2012. World Statistical Compendium for raw hides and skins, leather and leather footwear 1993-2012 5. http://en.bdfish.org/2013/05/economic-importance-shellfish-bangladesh/


TANNIN TREE PLANTATION

NEW STREAMLINE: SOLID WASTE DYEING AGENTS CULTIVATION

tree tannin

LIME SHELL FISHERY

natural dyes shell lime ig

h finis ng dyei g

ng

shi e fl e

d

ng limi ng ri a h de

g+ n i t a b ling k c i p

in tann

leather residues

acid LEATHER BONDING

lime fleshings

A new streamline workflow is to facilitate this material flow. As logistic route passing through each step making rickshaw transporting waste easier and elevated roof to resease toxic gas.

FLOAT RECYCLE

POULTRY SOUP BOILER

CHEMICAL RECLAMATION


NEW STREAMLINE: EFFLUENT

BOD COD BOD

fat

COD BOD

dyes

COD organic

BOD

N chrome

COD

Cr+

salts organic

BOD

N

COD salts

BOD

Water gullies through central lower point of the plants lead biodegradable and toxic effluence separately using gravity.

organic

COD SS

N

acid

liquid residues


SAVAR SOUTH

Jan 17, 2014

0 PLOT CLAIMED

Till now the plot allocated is still empty. The site is right along the Dhaleshwari river and surrounded by farmland. Savar industrial zone on the North begins to sprawl southward.


8. PLANTATION + UNITS

The vegetation prevents erosion of the underlying soils.

7. TOP SOIL

Helps to support and maintain the growth of vegetation by retaining moisture and providing nutrients.

6. LEACHATE COLLECTION LAYER

A layer of sand or gravel or a thick plastic mesh called a geonet collects leachate and allows it to drain by gravity to the leachate collection pipe system.

TANNIN ORCHARD

5. FILTER GEOTEXTILE

A geotextile fabric, similar in appearance to felt, located on top of the leachate collection pipe system to provide separation of solid particles from liquid.

BUFFER SLOPE

4. LEACHATE COLLECTION PIPE SYSTEM

Perforated pipes, surrounded by a bed of gravel, transport collected leachate to specially designed low points sumps.

3. GEOMEMBRANE

A thick plastic layer forms a liner that prevents leachate from leaving the plant and entering the environment.ate.

2. COMPACTED CLAY

Is located directly below the geomembrane and forms an additional barrier to prevent leachate from leaving the p and enter- ing the environment.

1. PREPARED SUBGRADE

The native soils beneath the plant are prepared as needed prior to beginning plant construction.

Pretreatment in the new site is soil capping to prevent leachate.

LINED PLOTS


LAYOUT SPECIALIZED DYEING

A 0.72ha=7200m2=90*80m 24plots $103,000/p

SPECIALIZED TANNING

B 0.36ha=3600m2=90*40m 36plots $51,500/p

C 0.18ha=1800m2=90*20m 104plots $25,750/p

workflow

WORKFLOW

non-biodegradable effluence biodegradable effluence

EFFLUENCE

PLOT TYPE

1KM


HOUSING

.0

10

2

m

60

6.0

15

.0

3.0

.0

20

4 household / storey * 5 = 20 tanners with household = 300 m2 12000 tanner with household = 225000 m2 = 22.5ha


CLASSIFICATION + ADDITIVE

a ak

dh ric -a

TOXIC WATER COLLECTION

ha

SEWAGE DISCHARGES

y hw

ONE UNIT LINE

savar - manikganj hwy

COMMUTER ROAD

SOIL CAPPING 66.5HA

DYES GARDEN

WATERWAY STATION

TANNER HOUSING 24HA

SEWAGE IRRIGATION

GREEN PATH

STREAM-LINED PROCESSING TANNIN ORCHARD

SHELL CLAM NURSERY

SHIPPING CHANNEL

CUT BACK EFFLUENT WETLAND 1KM

1KM

Water Diversion

1KM

New Tannery

Satellite Settlement 1. Human Rights Watch. 2012. Toxic Tanneries, The Health Repercussions of Bangladesh’s Hazaribagh Leather 2. M.N. Uddin. 2005. The relationship between Urban Forestry and Poverty Alleviation -Dhaka as a case study


URBANIZING [SAVAR SOUTH] SAVAR SPRAWL

FARMLAND DHALESHWARI

domestic sewage

FLOOD PLAIN

10 yr UPLAND PLANTATION

TOPSOIL LLECTION LEACHATE CO

irrigation

GROUNDWATER

DRY SLOPE ORCHARD + TANNIN

INDUSTRY RIVERBANK

LOWLAND GARDEN + DYE

non-biodegradable effluencent

MARSH EROSION CONTROL

GRAVEL BED FLOOD BUFFER

CAPPED SOIL TANNERY

biodegradable effluent

effluent wetland

Engineering terrain to lead water, this new site tries to provide a livelihood to tanners and their family members. The strategic urbanizing enables opportunities for green industry and informal innovation.


HAZARIBAGH TANNERY VACATING

249 units

NEW PROCESS SHOWROOM

19 units

1 unit

fruit harvest after 5 yrs

canopy mango / jackfruit/ tamarid

1

phytostabilization

sub-canopy bamboo / palm

1

phytoextraction plant 2rd yr

soil

in-situ treatment

REMEDIATION

1

timber harvest after 5 yrs 1

phytotransformation mow 18 months

herbaceous native community

1

sowing

1

fruit harvest after 3 yrs

1

1

1

1

1

1

1

1 1

1 1

1

1

INDUSTRIAL PARK

function in 5 yrs wetland ponds construction

constructed wetland

harvest 1st yr

paddy boro

1

sowing / retention harvest 1st yr

paddy aman emergent semiaquatic submergent water hyacinth macroinvertebrate prawn / clam / crab

1

1

1

1

sowing / retention

1

1

1

1

sedimentation absorption fishery + de nutrition

microbe

soil conditioning + nitrification

EFFLUENCE TREATMENT

PRODUCTIVE RIVERFRONT

6

60 BOD (mg/l) 0

water 0 level(m)

BURIGANGA LIVING BURIGANGA CALENDAR J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND J FMAMJ J A SOND monsoon 2014

SAVAR SOUTH TANNERY ESTATE

0 unit

achiote maddar marigold

3

1

2017

3

1 2

harvest 3rd yr

2

1

2

3

1

2

3

sowing sowing sowing

1 2

2020

1

2

1 3

2021

2022

2023

SAVAR SOUTH GREEN TANNERY 195 units

1 1

2

harvest 3rd yr 1

1

1 1

3

1

2

1

2

1

drying 1.5m

1

2

1

1

2

1

1

2

1

1

3

2

1

1

1

1

2

1

2

1

1 1

1

1 1

3

1

1

1

3

1

3

2

1

1

1 2 1

1

1

3

1

3

2

1

1

1 2 1

1

1

3

1

3

2

1

harvest 5th yr

1 2 1

1

1

3

1

3

2

1

1

1 2 1

1

1

3

1

1

1

harvest 4th yr

1 2 1

1

harvest 1st yr

3

1

harvest 5th yr

sowing

tea

2019

3

1

sowing

onion

1 2

1 1

3

2018

3

harvest 3rd yr

sowing harvest 1st yr

sowing

1 2 1

pomegranate

VEGIE DYEING + TREE TANNIN

1 2

sowing

areca nut

haritaki

3

sowing

2016

185 units

harvest 1st yr 1 2

indigo

2015

1 1

DYE GARDEN + TANNIN ORCHARD

1


DHAKA INDUSTRIAL RELOCATION

1: A GREEN CORRIDOR LINKING DOWNTOWN DHAKA TO RIVER HAZARRIBAGH: INDUSTRIAL PARK WETLAND POND

SEWAGE DISCHARGE

2: A CLOSED-LOOP INDUSTRY CLUSTER SAVAR SOUTH: GREEN TANNERY

PLANTATION / OPEN SPACE

RIPARIAN HABITAT 3: A REVIVED WATERSHED DHALESHWARI-BURIGANGA

SHELLFISHERY

EFFLUENCE WETLAND

Migrating density and industrial development. Creating for settlement, closed cycle industry and ecology for new site and remediation, riparian productive ecology and green linkage for old site. Water is essential factor in the process.

PRODUCTIVE RIVERFRONT


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