CA advanced water treatment project to explore new source of water, 10/9/14

CALIFORNIA -- Padre Dam Municipal Water District of California has announced that it will begin an advanced water treatment plant project to explore a new source of water in the city of Santee as a means to diversify its water supply, while also reducing its dependency on imported water.

A demonstration project -- funded by a grant -- will result in the construction and installation of an indirect potable reuse facility, utilizing advanced water purification technologies. The treatment process will include: chlorine disinfection, coagulation, ultrafiltration, reverse osmosis (RO) and advanced oxidation.

Biwater, a global provider of large-scale water and wastewater solutions, will provide a complete turnkey design and supply and commission all process, mechanical, electrical, and control components for the plant. The company was chosen for its ability to supply a fully integrated system on a fast-track delivery.

In addition to the chlorine contactor, ultrafiltration and RO system, and advanced oxidation process system (using ultraviolet (UV) light and oxidation), the project will include field pumps, a chemical dosing systems, programmable logic controller (PLC) and instrumentation, motor control centers, and electrical panels.

The new facility will treat secondary effluent from a wastewater treatment plant in the District, and the treated water will be used for demonstration and testing purposes to ensure it meets or exceeds the California Public Health Department's draft regulations.

Following commissioning, the demonstration project will run for a period of one year. In parallel, studies will continue to assess the capacity of the Santee basin aquifer and the feasibility of extending the project beyond the demonstration and testing period to serve a larger customer base in California.

After the testing period, the District hopes to be able to expand the facility and to construct a full-scale plant to provide up to 10 million gallons per day of treated water with indirect potable reuse potential. With the necessary approvals to proceed, treated water would be injected into the local groundwater basin. It would undergo natural filtration, be withdrawn, treated again, and then distributed as potable water to customers.

See also:

"Padre Dam to study feasibility of Advanced Water Purification Program expansion"

"Padre Dam awards $1.5M contract for advanced water purification project"

About Padre Dam

Padre Dam provides water, sewer, recycled water and recreation services to approximately 100,000 residents in East San Diego County including Santee, El Cajon, Lakeside, Flinn Springs, Harbison Canyon, Blossom Valley, Alpine, Dehesa and Crest. The District is a public agency with policies and procedures directed by an elected five-member Board of Directors. Padre Dam’s infrastructure is worth $243 million and has an annual budget of $53 million. The District imports 100% of our treated water supply and treat two million gallons per day (MGD) of wastewater at our Water Recycling Facility. For more information, visit

About Biwater

Biwater provides large-scale water and wastewater solutions for clients across the world. Since its inception in 1968, Biwater has gained recognition for its innovative approaches aimed at overcoming the world’s most pressing water-related challenges. Throughout its history, the company has grown to meet the demands of many water-stressed countries and their burgeoning populations. It has a successful record of accomplishment, having completed over 25,000 projects in over 90 countries -- financing, consulting, process engineering, designing, constructing, operating, maintaining and owning water facilities -- in both rural and urban environments. For more information, visit