Transcript CWNS Strategy Goals & Potential Benefits

Renewable Energy for the
Wastewater Industry: the Office of
Water Perspective
WEFTEC 07
Workshop
October 13, 2007
Jim Wheeler, USEPA
Office of Wastewater Management
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Who We Are
• US EPA’s Office of Water
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Office of Ground Water and Drinking Water
Office of Science and Technology
Office of Wetland, Oceans, and Watersheds
Office of Wastewater Management
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Municipal wastewater treatment technology
Strom water management
Biosolids management
Concentrated animal feeding operations (CAFO)
Water conservation/wastewater reuse
Decentralized (on-site) treatment/Small Community options
Manage the NPDES Program
Clean Water Needs Survey
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Why Do We Care?
• Water/Wastewater treatment use approximately
3% of the nation’s energy
• Water
– 350 kWH/MG for raw water pumping and treatment
– 1150 kWH/MG for pumping and distribution
– National average = 1500kWH/MG
• Wastewater
– 150 kWH/MG for raw sewage collection and pumping
– 1050 kWH/MG wastewater and solids treatment
– National average = 1200kWH/MG
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Why Do We Care?
• For wastewater - energy represents
25-30% of the total plant O&M
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Raw sewage pumping = 12%
Aeration = 52%
Solid handling = 30%
Lighting, heating, AC, and masc. = 6%
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Why is this Important?
• Approximately 16,583 municipal treatment
plants in the US
• Approximately 1,006 have anaerobic
digestion
• Approximately 544 have flows greater than
5 MDG
• Only106 utilize the gas for heat or power
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Why is this Important?
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Generates 1,700 # of solids per MGD
Can produce 10,700 ft3 of digester gas per MGD
Fuel value 500-650 BTUs/ft3
Equivalent to 6,500,000 BTUs per MGD
Can generate 50-150 kWh per MGD
All the municipal Plants at 5 MGD and greater
could produce 340MW of “green energy” per year
• Provides 20-60% of the plants energy needs
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What is OW’s Interest
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Part of the Agency’s broad climate change strategy
Municipal plants can provide green power
Can reduce green house gases emissions
Can reduces overall O&M coast
Supports sustainability
Can provide auxiliary power during power outages
(prevents bypasses and overflows – thus
protecting water quality)
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OW Draft Climate Change Strategy
• Impact on Water Resources
– Water supply
– Wet weather flows
– Sea level rise
• Greenhouse gas mitigation
– Source control
– Generation
• Education
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What is OW Doing?
• Jointly with other EPA offices - developing a
comprehensive climate change strategy
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Energy conservation – 20% reduction by 2010
Reduce GHG emissions - 20% by 2010
Reduce water use – 20% by 2010
Maximize the production and reuse of on-site generated
energy
– Maximize the reuse of wastewater effluent
– Maximize the use of storm water
– More effectively use decentralized systems
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What is OWM Doing?
• Municipal Technology Fact Sheets
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Energy Conservation
Viable Sources of Auxiliary Power
Two Stage Digestion
Microturbines
Solar Cells
Fuel Cells
Wind Turbines
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What is OWM Doing?
• Emerging Technologies Report
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Collections systems
Biosolids Management
Wastewater Treatment
Energy Conservation and Renewable Energy (proposed)
• Demonstration Projects
– King County, WA – carbonate fuel cell
– Columbus, GA – digester
• Incentives
– Under SRF
– Under other programs
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What Is OWM Doing?
• Water Sense
– Partnership with utilities, manufacturers, local
governments, and non-profit organizations
• Promote water efficiency by industries, local
government, developers and individuals.
• Raise public awareness
• Support the development of water efficient products
• Testing and labeling by independent third party
• Look at incentives (funding, tax credits, etc.)
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What is OWM Doing?
• Water Sense
– Save water save money
• Average household could save more than $130 per year
• Utilities could save 3 trillion gallons of water per year
• The country could save approximately $17 billion per year
– Save water save energy
• 1% of the homes retrofitting with water efficient fixtures could
save 100 million kW of electricity per year
• 1% of the homes replace old toilets with high-efficiency toilets
could save 38 million kW of electricity per year
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What is OWM Doing?
• Storm water management supports
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Phase I and II Strom water permit program
Low impact development
Minimize paved areas
Pond, marshes, and wetlands
Buffer zones
Green roofs and roof gardens
Storm water reuse/ground water recharge
ASCE - Storm Water BMP Data Base
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OWM Partners
• Working with out partners
– EPA’s Office of Air and Radiation
• Energy Star
• Combined Heat and Power Partnership
– EPA’s Office of research and development
– WEF
• Water and Wastewater Treatment Plant Design Committee
– Water Environment Research Foundation
• Optimization of Wastewater and Solids Operations Challenge
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NACWA
CEE
EPRI
NYSERDA
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Conclusions
• EPA is a major player in promoting:
– Water conservation
– Energy conservation in municipal water and
wastewater treatment plants
– Utilization of on-site generation of heat and
power from biogas
– Energy self-sufficiency through utilization of
alternate power source (solar, wind, hydro)
– Reduction of GHG emissions
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http://www.epa.gov/owm/mtb/mtbfact.htm
James Wheeler
US EPA
Municipal Technology Branch
MC 4204M
1200 Pennsylvania Avenue, NW
Washington, DC 20460
(202) 564-0662
[email protected]
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