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[powerlinemagazine-blog]

Water Treatment New solutions for achieving zero liquid discharge

Water is nature’s most wonderful, abundant and useful resource, used as a coolant for steam condensation in thermal power generation, HVAC systems and in process plants. For the efficient use of water for power generation, solutions like reverse osmosis and chemical treatment are not sufficiently effective as their residual rejects are costly to manage and difficult to dispose off, creating environmental hazards.

Further, water contains a lot of impurities in dissolved and suspended forms. Calcium and magnesium salts present in water determine the hardness of water and these salts form hard water scale, with increase in temperature, in heat exchangers of various industries.

So far, to avoid the occurrence of the scaling phenomenon, all cooling water circulation systems are forced to make a blowdown of chemically treated water on an hourly/daily basis. This not only creates water pollution, but also makes water management very tedious, being approximately 25-40 per cent of the total makeup water quantity.

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