Cedar Grove Composting
A bit of history‌
City of Seattle and King County Lead the Way! 1989 City of Seattle, green waste Projected tonnage: 12,000 Tonnage:
Growth Since 1989
48,000
250,000 200,000
1990 Tonnage: 100,000 Added King Co suburban cities unincorporated King Co
Tonnage
150,000 100,000 50,000 0 1
2
3
1989, 1990,2007
2007 Tonnage: 250,000
Great job, Seattle and King County citiesRecycling works!
Cedar Grove has processed over 4 million tons diverted from landfilling since 1989! Future Growth with Food Scraps and Other Organics 500000
150,000 tons annually food and 400000 commercial organics! Tonnage
300000 200000 100000 0 1
2
3 1990-2012
4
5
Technological Evolution of Composting in our Region and Nationwide Year 19891995
Action Initiated composting: Static piles, windrow
Result Volumes beyond U.S. technology
Technological Evolution of Composting in our Region and Nationwide Year
Action
Result
19891995
Initiated composting: Static piles, windrow
Volumes beyond U.S. technology
19961999
European model: Added negative air, EMS
Significant improvement
Technological Evolution of Composting in our Region and Nationwide Year
Action
Result
19891995
Initiated composting: Static piles, windrow
Volumes beyond U.S. technology
19961999
European model: Added Significant negative air, EMS improvement
20002004
Post-consumer food/commingled yard/food
In-vessel system/Gore™ Cover System
Technological Evolution of Composting in our Region and Nationwide Year
Action
Result
19891995
Initiated composting: Static piles, windrow
Volumes beyond U.S. technology
19961999
European model: Added Significant negative air, EMS improvement
20002004
Post-consumer food/commingled yard/food
In-vessel system/Gore™ Cover System
20042008
Everett build-out
Increased capacity for regional growth
Today
-Everett-228,000 tons/year. -Maple Valley- 195,0001990 tons/year 1997 2002 -Regional permitted capacity 423,000 tons/year. -Additional long-term capacity available
MAKING COMPOST!
Phase I Moisture: 60% Temp: 165 F Time: 28 days
Phase II Moisture: 55% Temp: 152 F Time: 14 days Phase III Moisture: 50% Temp-150 F Settles- 120 F Time: 14 days
FINISHED COMPOST
Cedar Grove Focus on Education/Product Quality
Regulations and standards Uses of compost Improve soil quality Conserve water Reduce pesticides and fertilizer usage Comprehensive standards
Products-Landscape and Gardening
WSDA registered organic material Increase plant size, remove C02 from air Sequester carbon, return to soil
For almost 20 years…
Processed :4 million tons of organic Created: 3.2 million yards that were successfully distributed back out into environment Equivalent in volume to 87 million bags Current- 750,000 bags and 250,000 bulk yards per year
Compost in the Community
Post construction BMPs -WDOE BMP in state SW manual
Compliance within next 2 years Educating Contractors
CG is KC Link-Up Partner
Two for one
Erosion Post-construction
CESCL Training at Maple Valley
Residential Programs
Our technology allowed residents to commingle yard + food/organics in 2004 No additional collection vehicles, helping the cities control costs while adding more diversion Collaborate with KC and City of Seattle to educate consumers and increase participation
COMMERCIAL COLLECTION ď ą
Cedar Grove Organics Collection Service - Help meet city and county diversion goals -Initiated to assist commercial customers in expediting their organics recycling programs
Successful Commercial Organics Recycling Programs
TO DO: Site assessment Proposal Training Containers Collection
Growth in Cedar Grove’s Commercial Organics Collection Green Scene partners include grocery chains, restaurants, hospitals, schools and universities, coffee house chains and stadiums.
Commercial Tonnage Growth 37000 40000 30000 Tons/Year
16000
20000 10000 0
www.gogreenscene.com
Tonnage 2006-2008
Home Depot and Cedar Grove A Successful Collaboration
Collection of organics at 3 King County stores; added 9 more stores after initial pilot Normally landfilled wood and plant waste Backhaul bags already coming to stores on dedicated semi trucks
Home Depot Program Highlights 2007 800 tons (8 mos.) 2008 (projected) 4000 tons (12 mos.) - Landfill diversion - Less fuel through backhaul
Mackay Restaurants
Executive Chef Steve Cain
Cost savings Educating employees Easy transition 300 tons since inception
Example of PASS Items Corn Cup
Corn Clamshell
Didn’t Pass Items
For each ton of organic waste composted at Cedar Grove Composting‌
.93 metric tons of CO2e are avoided
What’s the impact? We contributed to eliminating 299,008 metric tons of CO2equivalent into the atmosphere, or the annual amount produced by‌
40,000 American households -or54,000 American drivers
* All figures are rounded
Cedar Grove in the Community Seattle Tilth Neighborhood Pea Patches
Seattle King County school gardens Youth Garden Works Seattle Public Schools
The Future The Future
-Development
of property (100 acres) -Alternate energy from biomass -Anaerobic digestion of food scraps to energy -Recycling campus for new technologies
SUSTAINABLE RENEWABLE