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Partner Profile
| City of San Diego, CA | |
| Location | San Diego, CA |
| Organization Type | Govt. (Local, Municipal) |
| Percentage Green Power | 27% |
| Organization-wide Purchase | Yes |
| Awards/Recognition | Green Power Leadership Award 2003 |
Environmental Web Page  | |
| Partner Profile The City of San Diego, California, a 2003 Green Power Leadership Award winner, is pursuing energy independence and becoming a model city by using renewable energy resources and energy conservation. The City has a commitment to produce 50 MW of renewable energy in San Diego within the next decade. In meeting this commitment, the City operates a gas utilization facility located in the Point Loma Waste Water Treatment Plant (PLWWTP). This cogeneration facility is powered by methane gas and generates 4.57 MW of electricity. In addition, PLWWTP employs a hydroelectric facility producing another 1.35 MW of power generated by the 100-foot drop of treated sewage flow exiting the plant into the ocean. The plant recently added a 1.2-MW generator peaking unit that runs on 80 percent digester gas and 20 percent diesel fuel. This is the first time any existing diesel generator has been converted into a peaking unit utilizing digester gas. Methane gas produced by the set of digesters at the Metro Biosolids Center (MBC) and landfill gas from the adjacent Miramar Landfill is captured and converted to produce 6.4 MW of electricity. Following the success of the MBC, the North City Water Reclamation Plant was built to produce 3.8 MW of energy from excess landfill gas. A third party partner produces power for the wastewater treatment operations and also sells excess electricity to the local utility. A total of 10.2 MW is produced from cogeneration as a result of these two facilities. The City of San Diego generates 152,617 MWh of renewable power on an annual basis. Approximately half of the 10.2 MW produced at the wastewater treatment plants is utilized on site. The City has 13 photovoltaic systems installed throughout the region on City-owned facilities capable of producing 1,240 kilowatts. In 2009, another megawatt of solar power is scheduled to be installed. | |