Community Scale Digester with Advanced Interconnection to the Electrical Grid
Demonstrating an innovative anaerobic digestion system using high-rate biodigester technology.
By the end of the extended term (March 2020),
the project team successfully installed, and is now operating, the innovative anaerobic
digester system incorporating CleanWorld's high-rate biodigester technology to
process organic wastes from a local waste hauler and high-strength slurry. The project
demonstrated the capability to produce at least 8,760 MWh of renewable
electricity to be sold to Southern California Edison under the SB 1122 Bioenergy Feed-in Tariff. It also
demonstrated the concept of load-following power output without excessive
The project installed and operated an innovative anaerobic digestion system using a high-rate biodigester technology that will process approximately 50 tons per day (TPD) of organic waste from a large supermarket distribution center and 50 TPD (20,000 gallons) of high-strength slurry created by recovering and concentrating organics in wastewater streams. This project is co-located with the Co-West Commodities Wastewater Pre-Treatment Facility - an operation that collects wastewater (carbs, sugar, protein, and fat, grease, and oil) from industrial businesses and pre-treats the material for disposal into the local sewer system.
The method developed by this project would lower the system cost, resulting in a significantly lower price of electricity compared to traditional or fossil generation. The estimated LCOE is $122/MWh.
The co-products are 1,226 tons of residual solids for vermicomposting feedstock per year and 1.6M gallons per year of liquid effluent for fertilizer.
The project will divert and use food wastes to generate electricity that will yield reductions in greenhouse gas emissions, with a net offset of 4,125 MT CO2e/year. It will also improve environmental quality by providing clean energy while improving wastewater quality and reducing odor via anaerobic digestion.
This project will provide reliable renewable electricity without the need for standby and backup power and capable of providing power during peak energy demand.