In conjunction with the construction of the new wastewater treatment plant at the Miramar Landfill, the City of San Diego saw the opportunity to solve several problems at once:
- Economic source of power and heat necessary to operate the wastewater plant
- Avoid costly flare system to deal with methane gas emissions from the Miramar Landfill
LSW Engineers, teamed with KMS Energy, Inc., and A. O. Reed Contractors, responded to the design/build RFP with a design that included a number of components:
- Wells and piping in the landfill for collection of methane gas
- Landfill gas collection compressors and over a mile of transmission piping to the cogeneration site
- Digester gas collection pipe
- High pressure turbine-feed gas compressors
- Two 5 MW solar Taurus turbines
- 31,000 lb./hr. steam heat recovery boiler
- Auxiliary duct burner piping for exhaust gas stream to biosolids drying
- 700-ton absorption chiller and cooling tower
- Pollution abatement equipment
- Turbine air inlet cooling
- 200 kW power supply for hydraulic "black start" capability
- Automated control system
- Electrical switchgear
- Distribution and connection to customer power supply
Owner: City of San Diego, Metropolitan Wastewater Department
Completion Date: 1995 (Design)
