Bringing out the
best of brackish
water
An important aspect and primary objective of the water treatment indus- try is to find ways to make unsafe water practical and safe for human use. When dealing with brackish water, for instance, opportunities exist to safe- ly and effectively lower salinity and the amount of total dissolved solids (TDS) and treat the water for use where fresh water is too expensive to access, limit- ed in availability and sustainable efforts are desired.
Treatment and uses of this category of water.
See the difference
To simplify, brackish water falls between seawater and fresh water. As it applies in the desalination industry, brackish water is similar to seawa- ter applications, except the salt content and dissolved minerals, TDS, is signif- icantly less than typical seawater. “Depending on the location, this ranges from 1,000 TDS, which is consid-
ered the beginning of brackish water, to the neighborhood of 10,000-12,000 TDS, which we refer to as higher salinity and higher brackish,” explains Kevin Terrasi, vice president of engineering for Pump Engineering and ERI Company. The basic process of treating brackish water in desalination applications is to pass pressurized water through a membrane. As fresh water passes through, brine or waste- water is rejected. “The difference between seawater appli-
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