• The Municipal Corporation of Tirupati (MCT) is set to take a giant leap in water treatment by putting in place what is claimed to be the country’s largest liquid waste treatment plant to use phytorid technology.
  • The plant coming up next to Vinayaka Sagar will treat 5 MLD (million litres a day). Sewage from the MCT’s seven adjoining divisions used to flow into the waterbody in the past, by way of gravity. With the advent of this plant, the water will now be treated before being let into the tank.
  • The project is developed at a capital expenditure of ₹11 crore under Smart City funds, and involving an operational expenditure of ₹3 crore.
  • The project will be operational in a fortnight.
  • The phytorid technology is developed by the CSIR’s National Environmental Engineering Research Institute (NEERI).
  • After the waste water is treated under sedimentation process to eliminate solid matter, the same is made to flow in a serpentine motion into a sub-surface chamber containing numerous barricades, while saplings are planted atop on a porous medium containing gravel and stones.
  • It is here that the organic matter gets eliminated.
  • Later, the water is made to pass through activated carbon filter to bring the Biochemical Oxygen Demand to 5mg, much lower than the national standard of 10mg set by the Union Ministry of Housing and Urban Affairs.
  • “The main advantage of this system is that it is cost-effective, involves no operational hassles, leaves a smaller footprint and emanates no foul odour,” says MCT Commissioner Anupama Anjali.


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