Barrage-based system at 14 STPs planned

The Bangalore Water Supply and Sewage Board (BWSSB) will establish barrage-based additional systems in 14 sewage treatment plants (STP) across the City.

Encouraged by the positive result following installation of barrage system at the KR Puram STP, the BWSSB is exploring possibility of replicating the same system wherever
feasible.

The Chairman of the Karnataka State Pollution Control Board (KSPCB) Vaman Acharya, who visited the KR Puram STP, on Tuesday, said: “The installed capacity of KR Puram STP is 20 MLD. However, after the installation of barrage-based additional system, the capacity utilisation has gone up by 10 MLD.

This system can be immediately installed at the STPs located at Nagasandra, Vrishabhavati Valley, Raja Canal, and later to the other STPs. It also consumes minimal resource and can be installed in 8 days.” 

In a bid to stop inflow of sewage water into the KR Puram lake, the BWSSB had come up with the idea of installing a small barrage across the stormwater drain adjacent to KR Puram sewage treatment plant a month ago. The medium barrage across the SWD was built at a cost of Rs 95,000 within a week.

Through gravity

The barrage will collect sewage through a pipe through gravity into a pit, pump sewage into the STP and release the fully treated water into the SWD which will eventually reach the designated lake. In this way, the lake will get only treated waste water and not sewage water. “Bangalore produces around 800 MLD (million litres per day) of sewage and the new system can definitely treat an additional quantity of 150 – 200 MLD.

“These decentralised systems, unlike big and time consuming projects, yield good results,” Acharya said, suggesting Water Board officials to arrange for removing silt and solid particles manually in barrage locations.  

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