Biogas from sewage plant to help make CNG

The biogas generated during the treatment of sewage at Asia's largest Sewage Treatment Plant (STP) at Bharwara in Lucknow might be used for the production of Compressed Natural Gas (CNG).

The state government has invited Expression of Interest (EOI) for selection of a private agency for the production and marketing of CNG. The STP was commissioned about seven months ago.

The project of CNG generation using biogas will be based on Public-Private Partnership model. The selected agency will be given land at the STP site for 25 years for installation of required infrastructure and use the biogas for production and marketing of CNG. The amount of biogas expected to be generated from STP is approximately 402.50 cubic metre per hour.

As per the EOI, after 25 years the CNG plant will be transferred to the state government, which may select any new agency to operate the plant. During first 25 years, the private agency will make monthly payment to the UP Jal Nigam for the actual quantity of bio gas used for CNG generation. It will also pay Jal Nigam, which is running the STP, a certain share from its profit. Meanwhile, UP Jal Nigam has planned a site visit cum pre-bid meeting at Bharwara on September 2.

"The project is envisaged to generate revenue from STP from biogas so as to meet out some part of the expenses required for operation and maintenance of the STP," said Ravi Rastogi, Chief Engineer, UP Jal Nigam. Jal Nigam has also kept the options open for production of Pressurised Natural Gas (PNG) or electricity using the bio gas.

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