The Bangalore Water Supply and Sewerage Board (BWSSB) has launched a system of treating sewage flowing through the storm water drain adjacent to KR Puram’s sewage treatment plant (STP). Although the storm drain is not meant for sewage flow, it was allowed for more than six years after the construction of the 20 MLD KR Puram plant in 2006.
The sewage water flowed into Vengayyana Lake near KR Puram polluting the water body.
Now the lake receives treated water, thanks to BWSSB engineers who have implemented a cost-effective initiative at the plant. “We can implement a similar model at STPs situated in Nagasandra, Vrishabhavati Valley and Raja Canal,’’ Vaman Acharya, chairman of the Karnataka State Pollution Control Board, said on Tuesday.
The BWSSB engineers have constructed a medium-high barrage across the storm water drain to collect sewage through a pipe in a pit and pump it into the STP. They have also made arrangements to release fully treated water into the storm water drain at a short distance of the barrage which eventually will reach Vengayyana Lake.
“This system, which consumes minimal resource, can be installed in seven to eight days and the result is instant. In this case, the cost incurred to achieve the objective was only `95,000,’’ Acharya said.
According to BWSSB engineers, the installed capacity of KR Puram STP is 20 MLD. But only five MLD of sewage was treated. After installing this barrage-based additional system, the capacity utilisation has gone up to 10 MLD.
The total installed capacity of the STPs in Bangalore is 721 MLD but the load is only around 40%.
It is estimated that the average capacity utilisation can be raised by five to 12 MLD in each STP by way of installing these barrage-based pumping of sewage from storm water drains. “Bangalore produces around 800 MLD of sewage and the new system can definitely treat an additional 150-200 MLD,’’ a BWSSB engineer said.
The BWSSB plans to implement similar method at the following places: Vrishabhavathi Valley STP, near Cooperative Institute, Banashankari; Christian Gudee, Ittamadugu; near Byappa Garden, Katriguppe; Ranganatha Colony, opposite BHEL; Bapujinagar railway track; Mylasandra STP, near Dorekere, Kumaraswamy Layout; Vinayaka Layout, Nagenahalli; Hebbal STP, behind Hebbal STP; Near BEL Road; 9th Cross HMT Layout; Near Raghu Medicals, Yeshwanthpur; Jaladarshini Layout; Near Mathikere Flyover; Yelahanka STP, near Ambedkar slum; Jakkur STP, near Basavalingappa Samadhi; K&C Valley STP, Central Silk Board; 14th main, HSR Layout; MV Garden, Ulsoor; Raja Canal STP, near Salem railway track; near petrol pump on Hennur Main Road; Illanagara, HBR Layout; near Rajacanal STP; Near Bethel Church, Kaval Byrasandra and Near Brindavan Nagar Telephone Exchange.