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Trade Effluents> Overview Water treatment additives including polyphosphates, polyester, phosphates, chlorine, bromine, and polyacrylates may be used by your power plant to control such characteristics as pH and metals concentration associated with wastewater discharges, especially cooling water systems. As a reminder, there are two broad types of cooling water systems:
One-pass cooling water systems typically take water into the plant from surface waters and pass it through the condenser(s) where it absorbs heat and is then discharged to a receiving water. Chlorine is added intermittently to control biofouling and is a pollutant of concern in cooling water discharge. Recirculating cooling water systems transfer heat from the water to the atmosphere via cooling towers, cooling ponds, or spray facilities. These systems are subject to metal corrosion, scale formation, and biological fouling, which have a direct effect on system operating efficiency; reliability, longevity and the composition of the bleed off sent to drain. Commonly used water treatment additives address these problems; however, some additives may contain metals in and of themselves, such as copper, zinc, hexavalent chromium, tributyltin and other organo-metallic compounds, which are pollutants of concern in cooling water discharge. Continue through to read more about water discharges and legilsation.
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