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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


Cedar Grove Composting