The City of Riverside is committed to making our town a greener place to live by supporting renewable energy, responsible purchasing and design, and sustainable practices. The Riverside Water Quality Control Plant (RWQCP) has invested in and established several green projects designed to use byproducts of the sewage treatment process to produce energy.
Wastewater treatment at the RWQCP involves anaerobic digestion where, in the absence of oxygen, bacteria digest residual solids and create methane gas as a byproduct.
This gas is mixed with a small percentage of natural gas to fuel three Caterpillar internal-combustion reciprocating engines that run generators, each of which is rated to produce 1.1 megawatts.
Heat produced by the operation of the engines is used to heat the digesters for optimum performance in the generation of gas. The generated electricity is used in various processes throughout the treatment plant.
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The Riverside Water Quality Control Plant (RWQCP) generates about 100 Wet Tons per Day (WTPD) of Class B digester sludge (“biosolids”).
Our biosolids are used in two ways:
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On April 27, 2005, the City began the Grease to Gas to Power project. Local grease haulers who pick up Fats, Oils, and Grease (FOG) were able to take FOG to the RWQCP for processing and injection into anaerobic digesters. By adding this grease wastewater to the anaerobic digestion process the RWQCP was able to increase gas production and methane gas concentration. The project was a huge success and has been the recipient of many awards.
The plant expansion includes expanding and improving this project through the construction of the new FOG Receiving Station. The new station can process up to 60,000 gallons of grease wastewater each day. This new receiving station will enhance biogas production in anaerobic digesters. Biogas is then converted to electricity using a Cogeneration System.
By offering local grease haulers a safe way to dispose of restaurant grease, this component of the plant expansion will have a significant positive impact on the environment and provide a beneficial use for wasted grease from local restaurants and food processing facilities.
The City’s Public Works Sewer Division Grease to Gas to Power project has achieved the following:
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Riverside Water Quality Control Plant (RWQCP)
5950 Acorn Street
Riverside, CA 92504
Phone: (951) 826-5311
The 311 Call Center is open during normal business hours to assist you.
After Hours Phone: (951) 351-6140
In case of an emergency or sanitary sewer overflow, please contact the RWQCP after hours number for immediate assistance.
|Hours: M-F 7:30 am-4:30 pm|
|Closed on Weekends and Major Holidays|