Compost Teach In
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This document summarizes a teach-in on composting strategies for Palo Alto held on January 10, 2009. It introduced the organics challenge facing Palo Alto and discussed various technology options for composting, including windrow composting, aerated static pile composting, in-vessel composting, and anaerobic digestion of food waste. It also covered experiences with composting in the Bay Area, biochar technology, and the impact of various approaches on global warming. Participants were provided information but the event did not attempt to determine locations or solve the problem.
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Compost Teach In
- 1. A Compost Teach-In: Informing Palo Alto’s Future Organics Strategy Lucie Stern Community Center January 10, 2009 2 PM to 4:30 PM
- 7. Take Care With The Compost Gods
- 8. Each Year Palo Alto’s Organics Will Fill A Football Field The Height of City Hall 130,000 Cubic Yards
- 9. Three Sources of Organics 60,000 Tons Per Year Composition of Disposed Organics
- 10. Disposed Waste: Where Organics Fit?
- 11. Biosolids Generation Source: http://www.cityofpaloalto.org/civica/filebank/blobdload.asp?BlobID=3740 Wastewater Sludge Incineration 17,117 metric tons of CO2e per year.
- 12. Current Organics End Points
- 16. Recycling It all started with AB939
- 17. Can’t get there without recycling organics Recyclables combined = 40% Organics alone equal almost the total tonnage of recyclables CIWMB 2004 waste charactorization study
- 18. Residential Yard Trimmings Collection
- 21. Newby Island Composting Facility
- 23. Windrow Yard Trimmings Composting
- 24. Aerated Static Pile Composting Technology
- 27. The building is an all-metal construction in a seismic zone 4 for a high snow-load
- 28. The facility is designed to process 45 tons/day of mixed organic waste. All process functions (pre-processing, composting, curing and product refining) are conducted within this building.
- 33. Compost to the Community
- 34. Turf Application ALLIED WASTE
- 38. Questions
- 70. Does Composting Contribute to Global Warming?
- 75. The question is not WHETHER we are going to compost or convert… …but WHAT, WHERE and HOW
- 77. Composting is Net Negative in GHG impacts.
- 78. Composting is Net Negative in GHG impacts. Composting releases negligible methane and nitrous oxide
- 79. Composting is Net Negative in GHG impacts. Compost application increases total carbon retained in soil
- 80. Composting is Net Negative in GHG impacts. Compost application reduces need for GHG intensive artificial fertilizers
- 81. Composting is Net Negative in GHG impacts. Compost application increases standing biomass.
- 82. Composting is Net Negative in GHG impacts. http://cli.gs/EPAreport for EPA report
- 84. Three Sources of Organics 60,000 Tons Per Year Composition of Disposed Organics
- 86. Current Organics End Points
- 87. DISCUSSION