Dissolved Air Flotation Tech for Water Treatment
Published on by Water Network Research, Official research team of The Water Network in Technology
The Water Utility Has Set in Motion the Process to Construct a 115 million Litres a Day Capacity Water Treatment Plant, using DAF Technology
With the government giving its nod to the Kerala Water Authority (KWA) to source drinking water from downstream of the Neyyar, the water utility has set in motion the process to construct a 115 million litres a day (mld) capacity water treatment plant, using Dissolved Air Flotation (DAF) technology. Of this, 100 mld would be supplied to the city and 5 mld each to Maranalloor, Malayinkeezhu, and Vilappil-Vilavoorkal areas.
How it works
The process to allocate work for setting up the plant had commenced, a senior KWA official told The Hindu . The DAF technology was widely preferred as the plant needed relatively less space, and also provided an alternative to sedimentation. (Under DAF, suspended matter such as oil or solids is removed from the water by dissolving air in water under pressure. Then air is then released in a flotation tank. The air forms bubbles which stick to the suspended matter causing it to float to the surface from where it can be removed.)
"Water treated using DAF smells and tastes better. The amount of chlorine needed for disinfection will be considerably less," the official said. The Maranalloor panchayat had started the process of transferring 1.5 acres of land to the KWA for setting up the plant.
The planning wing had estimated that the plant would cost around Rs.33 crore and the amount had already been sanctioned by the government along with another Rs.2.65 crore for constructing a weir to utilise excess water during monsoon.
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