EBMUD Generation Station Renewable Energy Expansion

East Bay Municipal Utility District, 
California

EBMUD Generation Station Renewable Energy Expansion

Awards: 
2013 John L Martin Partnered Project of the Year Award, Sapphire Level - International Partnering Institute
Service Type: 
Project Highlights: 
  • Evaluation of alternatives for expanding an existing 7.0-MW power generation station to utilize increased digester gas production at its wastewater treatment plant.
  • Recommendation included an additional new power generation station to operate in parallel with the existing power generation station.
  • Carollo designed two 4.5-MW Solar Mercury 50 gas turbine generators and all appurtenant devices to generate 9 MW of additional electrical power.
Original 7-MW cogeneration facility
Carollo designed an expansion for this original 7-MW cogeneration facility for the EBMUD’s main wastewater treatment plant in Oakland, CA.

The East Bay Municipal Utility District (EBMUD) hired Carollo to review alternatives for expanding its existing 7.0-MW power generation station (PGS) to utilize increased digester gas production at its wastewater treatment plant. Project goals included maximizing power and heat production using an expected gas production of 4,000 standard cubic feet per minute (scfm). The resulting project is an additional new power generation station, PGS II, to operate in parallel with the existing PGS.

The new PGS II will initially contain two 4.5-MW Solar Mercury 50 gas turbine generators and all appurtenant devices to generate 9 MW of additional electrical power. The design of PGS II accommodates an additional third 4.5-MW gas turbine generator to bring the total capacity of PGS II to 13.5 MW. The design includes gas treatment equipment to remove siloxane compounds from the digester gas and gas compression equipment to provide the required pressure for the gas turbines. Carollo also provided electrical equipment to provide dual redundant power feeds from PGS and PGS II to ensure uninterrupted power generation and electrical power redundancy to the treatment plant.