New sewage plant for Colaba in the pipeline

In a bid to increase the capacity of sewage treatment plants (STP) in Colaba, the Brihanmumbai Municipal Corporation (BMC) is setting up a new 37 MLD (million litres per day) STP, work on which began last year. Colaba already has a STP but with only 24 MLD capacity.

The new one will not only add to the capacity of sewage treatment per day, keeping in mind the future population and water supply projection in the area, but it will be the first waste water treatment facility (WWTF) by the civic body which will enable reuse of treated sewage.

The sewage which will arrive at the treatment plant will be treated up to tertiary standards for reuse of treated sewage. The treatment includes influent pumping which will have primary treatment units, secondary treatment unit will have biological reactor, disinfection and the tertiary treatment will have disc filter. The effluent pumping station will have sludge dewatering unit. Of the 37 MLD capacity plant, 10 ML water can be treated and will be reused for non-potable purposes like gardening, industrial purpose and car washing.

"The Colaba WWTP is a milestone project of municipal sewage disposal project (MSDP). The objective is to recycle and reuse the water which will be treated and improve the water supply situation. We started the work last year and the plant will be operational by 2020," said Satish Narkar, Chief Engineer for MSDP.