Herohalli lake to get treatment plant by May

Herohalli lake to get treatment plant by May

The water treatment plant based on Soil Biotechnology Treatment (SBT) coming up at Herohalli lake will be ready by May, says Bruhat Bangalore Mahanagara Palike (BBMP) that is executing the project.

The Palike officials maintained that the commissioning of the plant, work on which started one-and-a-half years ago is in the final stage of completion. Costing around Rs four crore, the SBT plant is the first to be experimented on the City lakes.

“Till date, we had installed Sewage Treatment Plants (STPs) at lakes such as Dorekere, Dasarahalli and Uttarahalli. Presently, around seven million litres per day (MLD) of sewage water flows into the Herohalli lake. Now, a 1.5-MLD-capacity plant is being set up outside the lake bed with components such as pump room, grit chamber, sedimentation tank and others, said a Palike official.

The patented method was developed by Prof H S Shankar, department of Chemical Engineering, IIT Bombay, along with his students. Shankar told Deccan Herald: “The technology uses natural ingredients, processes and agents such as bacteria, culture worms, respiration among others. It cleans water without using much energy. The treated water can be let into the lakes for total reuse unlike conventional STPs that only disposes. The plant can, initially, treat around 1.5 MLD of water. We are planning to extend the technology to other lakes in Bangalore in the coming days.”

The SBT was developed between 1987 and 2002. And in the City, such plants are installed at four places, namely Arghyam Institute, FRLHT Ayurvedic Hospital, Command Hospital Air Force and the upcoming one at the Herohalli lake, Shankar added. 

S Krishnakanth, a member of Herohalli ward committee and a resident, maintained that the sewage water flowing from the houses of Herohalli village into the lake had resulted in huge contamination in the last few years. 

He added: “While SBT is a welcome step, maintaining the lake is equally important. The lake does not have a fence and it is in a bad shape. Debris is being dumped there by the local residents and there is no one to monitor the lake.”  

Palike said that presently, a total of 59 lakes are being maintained by the civic agency and out of them, 20 have been developed. 

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