1. Community Anaerobic Digestion: Wayne Davis
Vice President
Challenges and Opportunities Harvest Power, Inc.
MassRecycle 2012 Recycling & Organics Conference March 27, 2012

2. AD – Can History Repeat Itself?
Organic Wastes Composted Over Time
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21
19
Tons 17
(MM)
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13
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1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008
Year
1990: State yard waste landfill bans begin to 1991: Ocean dumping of biosolids completely prohibited
take effect, USCC formed
Waste Business Journal: Waste Market Overview & Outlook 2009
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3. About Harvest
Harvest, a Massachusetts-based company, is ushering in a new era of organic
waste management by harvesting the renewable energy and soil-building
potential in organic waste at its state-of-the-art organics recycling facilities.
Corporate Profile
• Builder, owner, and operator of organics
recycling facilities
 3 AD facilities in active development
 Operate one of largest compost sites in North
America (250,000 MT/year)
 Major compost marketer through Harvest
GardenPro
• Recognized industry-leading experience
• Investors include Kleiner Perkins Caulfield &
Byers, Generation IM, Munich Venture
Partners, and Waste Management Inc
• 250+ employees
• Expanding technology portfolio supported
by industry-leading science and technology
advisors
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4. The Harvest Organics Operating System™
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5. AD Technology Choices
Technology choice is driven by the markets for feedstocks and end products.
Batch High Solids Continuous High Solids Low Solids
Solids Content 25-50% 18-40% 5-15%
• Food scraps • Food scraps • Food scraps
Possible (50-60%) • FOG • FOG
Feedstocks • Yard trimmings • Dewatered biosolids • Waste water sludges
(40-50%) • MRF residuals • Manure
• Liquid fertilizer* • Liquid fertilizer*
Possible End
Compost • Compost or dry • Compost or dry
Products
fertilizer fertilizer
Contamination
High Medium Lower
Tolerance
Quantity of
Minimal Medium High
Liquid Effluent
* No market for liquid fertilizer in Connecticut.
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6. High Solids Facilities
Fraser Richmond Soil & Fibre, Richmond, BC
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7. High Solids Facilities
Fraser Richmond Soil & Fibre, Richmond, BC
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8. Low Solids Facilities
Cottbus R&D Facility
Harvest Power, London, OT
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9. Low Solids Facilities
• Many around the world
• Multiple providers and layouts
Cottbus R&D Facility
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10. The Siting Challenge
YES –
People do!

11. What People Worry About
Community perceptions, whether scientifically
grounded or not, must be recognized
• Odor
• Vectors
• Trucking
• Toxic air emissions
• General aversion to “waste” facilities
• Developers and big companies, especially from “outside”
• The Unknown
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12. Principles for Addressing Siting Challenges
Successful development of AD infrastructure will require collaboration of
the State, local municipalities, interest group advocates, and developers
• Choose sites wisely
• Reach out, early and often
o Solicit community input and be genuinely responsive
o Determine and deliver real, meaningful community benefits
o Cultivate consensus
• Educate, educate, educate
o Collaborate with independent 3rd parties
o Role for Mass DEP and Clean Energy Center
o Reference facilities and visits
• Focus on the 3 R’s
o Recycling
o Energy Recovery
o Replenishing soil
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13. There’s a better path for organics —
help us get there.
Wayne Davis, VP - Government Affairs
Harvest Power, Inc.
221 Crescent Street, Suite 402
Waltham, MA 02453
781-314-9504
wdavis@harvestpower.com
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