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The Districts, in partnership with USA Waste of California, Inc., have developed a food waste recycling 
project in which source separated food waste is collected, processed, and delivered to an existing 
anaerobic digester at the JWPCP. The addition of food waste has resulted in an increase of digester gas 
production and has generated an additional 250 kW of electricity by the JWPCP combined cycle power 
plant.  

Digester-gas fueled boilers at Palmdale, Lancaster and Valencia WRPs, and JWPCP supply heat for 
respective anaerobic digesters.   

Staff training teaches how electrical energy costs change during the day and week, and shutdowns of 
power plant equipment are scheduled to minimize loss of energy production during high-rate periods.  

Performance Measures & Results   

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Power generated from digester gas and used on-site at JWPCP: Average 16.8 MW for FY 2014-
2015  

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Electricity purchases avoided by generating power on-site:  $18.2 million for FY 2014-2015  

 

WATER REUSE  

 

Board/executive management reuse strategy established 

 

Communications and outreach plan developed and implemented  

 

Ongoing market assessment of reused water to public/private and public/public entities 

 

Investments in reuse infrastructure   

 

Building code changes to enable reuse (e.g., reuse water code)  

For over 50 years, recycled water produced by the Districts is reused off-site for a wide range of 
applications including urban irrigation, agricultural irrigation, cooling towers, industrial processes (carpet 
dyeing, metal finishing), environmental enhancement and construction applications (dust control, soil 
compaction, concrete mixing).  

A flow equalization tank will be constructed at the San Jose Creek Water Reclamation Plant (WRP) to 
increase the available amount of recycled water for reuse. There is a large demand for recycled water 
during the night, when production is lowest, and the flow equalization tank will boost production during 
the high demand periods.  

The Districts is partnering on a 1 MGD demonstration plant at our largest treatment plant, the Joint 
Water Pollution Control Plant, with the Metropolitan Water District of Southern California, with a 
feasibility study underway for a project to recycle up to 150 MGD for groundwater replenishment.  

Recycled water is used at all WRPs for irrigation, wash-down, pump cooling, chemical mixing, and toilet 
flushing. Site supervisor training program is provided to ensure proper use of recycled water.  

The Districts have provided engineering reports to the local regulatory authorities for expanded 
distribution systems and supported legislation promoting water recycling (e.g., approval of recycled 
water hose bibs at cemeteries).  

Performance Measures & Results