Coimbatore Corporation plans to run Nanjundapuram sewage treatment plant at full capacity

Coimbatore Corporation plans to operate sewage treatment plant at full capacity by connecting households and upgrading infrastructure.

Coimbatore Corporation has drawn up a plan to operate the 40 MLD (million litres per day) sewage treatment plant (STP) at Nanjundapuram at its full capacity by connecting households and commercial establishments in nearby areas that are yet to be linked to the underground sewer network.

According to Corporation officials, the proposal also involves replacing the existing treated water outlet pipeline to manage the anticipated increase in sewage flow. At present, the plant treats only about 20 MLD of sewage per day - half of its capacity - due to limited inflow. Treated water is discharged into the Noyyal through a 780-metre-long pipeline with a diameter of 600 mm.

To address the shortfall in inflow, the Corporation plans to lay new underground sewer lines in the surrounding unconnected areas. Once completed, the increased inflow will require a higher capacity outlet. The existing 600 mm pipeline will be replaced with a 1,200 mm pipeline along the same stretch to carry the treated water.

The project also includes laying a 2,300-metre-long collection system and installing over 900 house service connections (HSCs). The total cost is estimated at ₹8.25 crore, to be funded by the government.

An engineering official from the Corporation said the process of identifying properties requiring connections was under way. “It will take more than 10 years for the inflow to gradually increase and for the plant to reach full capacity. Based on the plant’s performance, we are receiving incentives, and improvement works for the STP will be carried out using those funds,” the official said.