Coimbatore Corporation gets State government nod for ₹245-crore RO plant in city
Coimbatore Corporation has received State government approval to establish a ₹245-crore Reverse Osmosis (RO) plant on the Ukkadam Sewage Treatment Plant (STP) premises. With a capacity of 25 million litres per day (MLD), the plant is intended to supply treated sewage water for industrial use, thereby reducing dependence on freshwater sources.
Of the total project cost, ₹73.5 crore will be contributed by the Central government, while the remaining amount will be mobilised through a public-private partnership (PPP) model. A proposal submitted by the civic body was approved in March this year by the Department of Municipal Administration and Water Supply.
According to the Corporation, the existing sewage treatment plants in the city carry out only secondary treatment, making the water suitable only for non-potable uses. The proposed Tertiary Treated Reverse Osmosis (TTRO) plant will carry out tertiary-level treatment, including ultra-filtration, reverse osmosis, and disinfection, bringing the water up to potable quality as per Central Pollution Control Board norms. However, the treated water will be supplied only for non-potable purposes that currently depend on freshwater sources.
An official involved in the project said a consultant had been appointed to prepare a Detailed Project Report (DPR) and identify potential users. The Corporation was mapping industrial demand by dividing the city into six corridors — Avinashi Road, Trichy Road, Mettupalayam Road, Sathyamangalam Road, Pollachi Road, and Perur Road. The study would assess the availability and demand for freshwater in industries, Micro, Small, and Medium Enterprises (MSMEs), hospitals, luxury hotels, and other non-domestic sectors.
'The treated water from the 70 MLD Ukkadam Sewage Treatment Plant will serve as the source for the TTRO plant, where it will undergo tertiary-level treatment. It will then be conveyed through pipelines to overhead tanks, which will be constructed near industrial clusters. From there, it will be supplied to individual units either by gravity or pumping. The pricing and other charges will be determined based on stakeholder inputs and operating costs,' the official said.
'The DPR is currently being prepared, and further work will be initiated upon its completion,' said Corporation Commissioner M. Sivaguru Prabakaran.
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