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In 2007, The Irvine Ranch Water District (IRWD) took steps to minimize concentrate disposal for its deep aquifer treatment system by further treating the brine stream with another stage of nanofiltration, naming theplant the Concentrate Treatment System (CTS). In 2008, with a focus on optimizing operating costs attheir reverse osmosis groundwater desalter, IRWD turned its attention towards minimizing theconcentrate stream through an antiscalant procurement process developed specifically for minimizingpretreatment chemical costs while simultaneously increasing operating recovery and decreasingconcentrate disposal volumes.As part of the Irvine Desalter Project, the Potable Treatment Plant (PTP) treats approximately 3 mgd ofbrackish groundwater with reverse osmosis before bypass blending and product stabilization. The planthas operated successfully for over a year, using antiscalant and sulfuric acid as chemical pretreatment toprevent precipitation of sparingly soluble salts (scale) in the tail end of the system. In an effort to reduceO

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 13File Size: 1 file , 720 KB