The Brihanmumbai Municipal Corporation (BMC) plans to set up wastewater treatment plants to reuse the water for non-drinking purposes.
The Rs 80-crore project is part of the civic body’s ‘save water’ campaign. Two wastewater treatment plants with a net capacity for treating 340 million litres of water per day (MLD) will be installed within a year at Colaba and Worli.
The city needs water 4,000 MLD water whereas the BMC supplies about 3,250 MLD. To stem part of the 750 MLD shortfall, the civic body has decided to treat waste water, which generally goes to the sea after being treated at the primary level as per Maharashtra Pollution Control Board norms.
The waste water will be purified by the new Sequential Batch Reactor (SBR) technology. This means the water will be treated at what is called the ‘secondary level’.
“The first plant having a 40 MLD capacity will be installed at the Colaba pumping station while the second plant, which will be at Love Grove pumping station, Worli, will have a 300 MLD capacity,” said Additional Municipal Commissioner (projects) Anil Diggikar.
“We will make necessary budgetary provision in the coming budget.”
The treated water could be supplied to the Sewri dock or railway authorities to be used for non-potable purposes like washing railway compartments, he said.
“We are searching for those who use non-potable water in a large quantity, so that treated water could be sold at cheaper rate.”
The treated water could also be used to wash vehicles in civic garages, cleaning hospital premises, by the fire brigade department and for gardening, Diggikar said.