The Rancho California Water District (RCWD) has gradually been replacing all of their gas chlorine disinfection with MicrOclor on-site hypochlorite generators manufactured by Process Solutions, Inc. (PSI). By the end of the summer, the Elm Street Pump Station will be operating the water district’s 46th hypochlorite generator, and the first one utilized for reclaimed water. The principal application will be irrigation for a variety of users, including a sports park and golf courses. The peak flow rate is 5200 gallons per minute (gpm), and the new hypochlorite system will be an MC-200 with a capacity of 200 pounds per day of free available chlorine (FAC). Jacob Wiley, Associate Engineer for the district, says, “We have continued to use MicrOclor hypochlorite generators because of the high quality of equipment backed up by the exceptional field service and warranties that accompany it.”

Hypochlorite generation uses salt, water, and electricity to generate a dilute bleach solution on site, eliminating the storage, transport, and regulatory concerns associated with chlorine gas and typically offering an operational cost savings over bulk delivered hypochlorite. The Elm Street Pump Station application is unique in that the tertiary treated effluent produced by RCWD’s existing Water Reclamation Facility will actually be used to feed the on-site sodium hypochlorite generation system following pretreatment utilizing a Reverse Osmosis system, also designed and supplied by PSI-MicrOclor.

RCWD serves 120,000 people in the City of Temecula, along with portions of the City of Murrieta, and the unincorporated regions of southwest Riverside County, all north of San Diego. The service area includes 940 miles of water mains, the Vail Lake Reservoir, and 47 groundwater wells. The district also imports water from northern California and the Colorado River.