Jain: India’s biggest sewage plant to be ready by 2022-end

Delhi: 18 Sep, 2021 (Times of India)

New Delhi: Delhi will soon get India’s largest sewage treatment plant (STP) at Okhla, which will be able to treat 564 million litres per day (MLD) of sewage and wastewater. Water minister and Delhi Jal Board (DJB) chairman Satyendar Jain on Friday visited the construction site of the project that is expected to be completed by 2022-end.
Once completed, the STP will be able to help trap a large chunk of sewage currently flowing into Yamuna and can treat sewage to biochemical oxygen demand (BOD) and total suspended solids (TSS) levels of 10 mg/l each, with nutrient removal, officials said.
Jain said the STP was being built over an area of 110 acres using state-of-the art technology. “The Kejriwal government is constructing the largest single STP in India. The capacity of this STP is 564 MLD and this means, after its construction, it will be able to stop 564 MLD of sewage from flowing into Yamuna,” said Jain.

“We are working with our full dedication and compensating for the delay due to Covid-19 by putting in additional resources. The work of this STP is expected to be completed by December 2022,” he added.

The STP will be receiving sewage largely from south and central Delhi and the plant will also have a solar drying system for around 150 ton of sludge spread over 12 acres. Advanced suction-based clarifiers are being used to improve the removal of solid particles from the wastewater.
“The treated water from this STP will be utilised for various purposes, such as in the groundwater recharge at Asola Bhatti Mines and its surrounding areas, rejuvenating lakes, waterbodies and the surplus water will be released into Yamuna,” a DJB official said.

In addition to this, two existing STPs of 72 MLD and 136 MLD will continue to function in the Okhla STP complex. This will take the total treatment capacity of the Okhla STP complex to 771 MLD.