Chennai

Koyambedu to get third sewage treatment plant

The sewage treatment capacity of the city is set to be enhanced with the Chennai Metrowater preparing to float tenders in a week for construction of another plant to treat 120 million litres a day at Koyambedu.

The new plant will facilitate treating of additional volume of sewage generated in the neighbouring suburbs. The Rs.116-crore project, which was sanctioned under Jawaharlal Nehru National Urban Renewal Mission, would come up at 25-acre site in the existing facility at Koyambedu.

At present, the two plants at Koyambedu jointly have the capacity to treat 94 mld of sewage generated in localities such as T.Nagar, Kodambakkam, Anna Nagar, Virugambakkam and Mogappair.

According to Metrowater officials said the new plant would take in the additional volume from suburbs such as Maduravoyal, Ambattur, Nerkundram and Nolambur that are being provided with sewerage network.

Unlike the existing facilities, the infrastructure to generate electricity from sewage would be provided during the construction of the plant. A work order is expected to be awarded in five months and the project would be commissioned in two years, the officials said. This would add to the existing nine facilities with a total capacity of 486 mld in areas such as Kodungaiyur and Nesapakkam and the upcoming two STPs with a treatment capacity of 114 mld.

Plans for tertiary treatment

Chennai Metrowater is considering upgrading of infrastructure to supply tertiary treated water to industries.

The water agency has identified demand for 35 mld of such tertiary treated water in the industrial belt at Sriperumbudur and Oragadam. The viability of the project is being discussed.

At present, the water agency is supplying 35 mld of treated sewage to industries in Manali and earns a revenue of Rs.12 crore a year.

Industries that purchase secondary treated sewage from Metrowater further enhance the quality through tertiary treatment and use it to cool their boilers.

About Rs.40 is being spent to provide such treatment for a kilo litre of secondary treated water, an official said.


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Printable version | Dec 1, 2021 10:26:42 AM | https://www.thehindu.com/news/cities/chennai/koyambedu-to-get-third-sewage-treatment-plant/article2160768.ece

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