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<br />The three tallest pumps have energy recovery turbines in <br />them that capture energy from the pressurized stream of <br />reject water before it leaves the desalting plant. After <br />going through the desalting process in the desalting <br />building, this stream of reject water fIrst goes through the <br />energy recovery units to turn these three pumps, thereby <br />reducing the overall electrical power consumption and <br />costs. <br /> <br />The clearwell pumps force the pretreated water into the <br />desalting process area in the large desalting building. <br />About three-fourths of the water is removed from the salts <br />and becomes product water as pressure forces it through <br />the reverse osmosis desalting membranes. This desalting <br />process lowers the water salinity from about 3,000 parts <br />per million to about 300 parts per million. <br /> <br />This desalted water (called product water) flows from the <br />desalting building into the small canal (or drain) that flows <br />about a quarter-mile into the Colorado River and becomes <br />part of the United States' treaty-required Colorado River <br />water delivered to Mexico. <br /> <br />The other one-fourth of the water does not pass through the <br />desalting membranes and contains the concentrated salts <br />that also don't pass through the membranes. This so-called <br />"reject water," measuring salinity levels of about 10 <br />thousand parts per million, quickly passes through the <br />energy recovery turbines at the clearwell pumping plant, <br /> <br />c:>peal1ld\SCripta\l'nOdel.chp (model.sty) e <br />