Designing

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Designing Implementing Energy Efficiency
Measures in Water/Wastewater Treatment Facilities
Angie Ong-Carrillo

• CEE Winter Program Meeting
• January 16-17, 2008
• Long Beach, California

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Distribution of Energy Use in a Generic Activated
Sludge Wastewater Treatment Plant
Extracted from Burton Environmental Engineering,
RCG/Hagler, Bailly, Inc. and Metcalf Eddy, Inc.
Water and Wastewater Industries
Characteristics and DSM Opportunities, EPRI,
1993.
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An Example of Energy Distribution in a Municipal
Wastewater Treatment Plant in Northern California
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Energy Efficient Technologies Used(Plants may
have more than one technology)
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WWTP that Have Implemented Some or All Energy
Efficient Recommendations from Audits
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Energy efficiency in Municipal Water Treatment
Plants

• Typically 80 of a water utilitys energy
  consumption is used for pumping water.
• Priority is given to
• Maintaining water quality
• Meeting daily consumer demand
• Providing water supply in emergency situations
  such as fire and power outages.
• Primary sources of water ground surface water
• New regulations will impose more stringent limits
  on the allowable concentration of impurities.
• Likely to require use of relatively new treatment
  techniques such as ozone, UV radiation, hydrogen
  peroxide, chlorine dioxide, or membrane
  filtration.
• PGE offers incentive to utilities that implement
  technology or equipment that exceed the energy
  efficiency of standard technology or equipment.

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PGEs Incentive Program

• Incent retrofit and new construction projects.
• Incentive Rate
• 8 cents/kwh motors, pumps,etc
• 5 cents/kwh lighting
• 80 cents/therm
• Caps 50 of project cost, annual site cap of
  3.5M
• Provide audit service and design assistance.

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Wastewater Plants Projects in 2006-2007
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Water Treatment Plant Projects2006-2007
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2008 Committed Projects
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Statewide IOU Water-Energy Pilot

• Partner with water agencies to fund incentives
  for commercial customers to save water and
  energy.
• Partner with SCVWD to replace toilets in low
  income households with high efficiency toilets.
• Partner with at least one water agency to
  investigate emerging monitoring and telecom.
  technologies to improve efficiency in water
  distribution

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Questions?