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| Last Updated:20/01/2014

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Mega Plan to Generate Power from Sewage

Indian Express, 20 January 2014


BANGALORE: In its efforts to minimise power bills, Bangalore Water Supply and Sewerage Board (BWSSB) is preparing a road map to generate 100 MW of power from over 1,000 MLD of sewage generated in the city.


BWSSB Chief Engineer S Krishnappa said, “As we are consuming around 60 million units of power every month, we are incurring a lot of expenditure on electricity bills.”


“According to our estimates, we can generate around 100 MW power from the sewage generated in the city. It will be sufficient to meet 75 per cent of our (power) needs.”


14 STPs Identified for Project


Krishnappa said BWSSB has identified 14 sewage treatment plants (STP) where methane gas can be generated from the sewage.


As the STPs are in good condition, BWSSB can start generating methane by constructing a digester near them.


“The biggest challenge is to ensure that the methane generated in the digester is pure in nature. If not, the generator that burns methane will be destroyed very soon,” Krishnappa said.


BWSSB has already initiated the process to produce electricity from sewage at one of the STPs in Hebbal valley by entering into an agreement with England-based Mott MacDonald Ltd.


Mott MacDonald Ltd team leader, Ian P Taylor said, “We have already imported the machinery required to generate 1 MW of power and initiated the process to construct a digester near one of the STPs. We should be in a position to generate electricity soon.”