Reducing a wastewater treatment plant’s energy consumption has economic, environmental, social, and operational benefits. To help EPCOR take advantage of these benefits, we assisted in the development of a biogas master plan for the Gold Bar wastewater treatment plant. Offering flexibility and optimal advantages for Gold Bar and the surrounding community, the plan integrates boiler operation and cogeneration, as well as biomethane and vehicle fuel generation.
Offering flexibility and optimal advantages, Gold Bar's biogas master plan integrates boiler operation and cogeneration, as well as biomethane and vehicle fuel generation.
Currently, biogas is used to fuel boilers for space and process heating at the facility. Continuing this valuable practice while interconnecting Gold Bar operations with the nearby Clover Bar wastewater treatment plant would allow Clover Bar to beneficially reuse excess gas for energy-intensive digestion, drying and gasification activities. Gold Bar would generate a revenue stream through the sale. Also, a 1-megawatt cogeneration system at Gold Bar would produce approximately 8 million kilowatt hours of electricity and offset approximately 20 tons of carbon dioxide emissions per year.
Biomethane—which can be used interchangeably with natural gas for a variety of purposes—can be generated from biogas, and achieves the highest value as a vehicle fuel. In addition, a partnership with the Clover Bar landfill would reap multiple rewards, including the use of biogas for garbage truck fuel and improved solid waste management. Creating co-digestion with the addition of organic waste from the landfill would make use of a previously wasted resource and increase Gold Bar’s production of methane for beneficial use.