LA Selects Innovative Water Reuse

Xylem to provide breakthrough water reuse AOP technology to LA Terminal for indirect potable reuse

California's state water board approved emergency drought regulations that aim to slash water use in urban areas by 25 percent. The measures call for cities and water agencies to reduce water usage by 8 to 36 percent*. Water reuse is a proven approach that can help meet growing water demands, while safeguarding existing water supplies. Water reuse technology produces high-quality water at a lower life-cycle cost than developing a new water supply, and delivers a resilient, drought-resistant water source with valuable economic and environmental benefits.

Xylem's Wedeco MiPRO photo AOP solution will be installed as a final barrier against pathogens and contaminants that cannot be removed by other technologies. The MiPRO photo system is part of an expansion of the plant at the Advanced Water Purification Facility, which includes microfiltration and reverse osmosis prior to AOP. The customized solution, validated through extensive pilot-scale testing at the plant, will be the first greenfield AOP design using ultraviolet (UV) light with chlorine for indirect potable reuse.

The Terminal Island Water Reclamation Plant treats wastewater from more than 100 businesses in the heavily industrialized Los Angeles harbor area and from 130,000 residents, including the communities of Wilmington, San Pedro and a portion of Harbor City. The plant purifies tertiary effluent, producing potable water quality for recharging the stressed drinking water aquifers - particularly important in the face of the ongoing drought. The recycled water will be used as a barrier against seawater intrusion to protect the groundwater against increased salinity, as well as a supply to local industries.

"This application of UV with chlorine as an AOP process is a significant breakthrough in treatment to make water reuse more sustainable and cost-effective," said Keel Robinson, North America Water Reuse Leader for Xylem. "The use of UV with chlorine for AOP will enable the Terminal Island Water Reclamation Plant to utilize their existing chlorination facility without having to add any new chemicals, and it will significantly reduce the life-cycle cost relative to the other types of AOP, such as UV with hydrogen peroxide."

Source: Business Wire

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• Treatment
• Water Reuse & Recycling
• Technology