Wastewater Process- Recycling in Action

The Fresno/Clovis Regional Water Reclamation Facility recycles nearly every component of wastewater. It’s true! We reuse and reclaim nearly every part of the influent wastewater.

Cleaning the Water

Mechanical, chemical and biological processes separate the less than one percent of solid matter from the more than ninety-nine percent of wastewater that is liquid. The liquid is treated, then recycled by percolating it into the aquifer and pumping it back to irrigation canals for reuse. From there, the water is available for irrigation purposes downstream from Fresno.

Recycling the Solids

Inside closed tanks, naturally-occurring microorganisms "digest" the organic solids removed from wastewater. Once adequate digestion has occurred at carefully monitored temperatures, mixing rates and times, the solids are further “dewatered” or dried, and hauled away to produce compost. Digested solids (also called bio-solids) are a valuable fertilizer and soil amendment that must meet strict federal and state standards for use on certain types of crops.

Recycling Gas Into Electricity

Methane gas, a by-product of the solids digestion process, is burned to produce electricity at a co-generation facility at our treatment facility. The electricity - you might call it "recycled" power - is used to off-set the need to purchase power to operate the facility. In the event of an extended power failure, this electricity would also serve as a backup power supply to keep our treatment plant in operation. Future expansion of the co-generation facility will allow the treatment plant to rely almost completely on it’s own power.