The Delhi Government is constructing India's largest ‘Sewage Treatment Plant’ (STP) at Okhla which will have a capacity to treat 564 million litres of waste water per day.

The STP that is spread over an area of 110 acres will be completed by the end of 2022. After the completion of this STP, major flows of sewage that flows into the Yamuna will get treated. This treated water will then be used for rejuvenating underground water while the rest will be discharged into the Yamuna.

Water Minister and Delhi Jal Board (DJB) Chairman Satyendar Jain visited the construction site of on Friday and said that the STP will stop 564 MLD of sewage from flowing into the Yamuna by treating to the latest norms of Biochemical Oxygen Demand (BOD) 10 mg/L and ‘Total Suspended Solids’ (TSS) 10 mg/L with nutrient removal.

“The treated water will be fit to be utilised for various non-potable purposes like gardening, lakes rejuvenation, washing, flushing etc. 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 said.

“This STP will receive the sewage from various drains and sewerage networks of South and Central Delhi. Most advanced systems are being integrated with this STP using state of art technologies.

The plant will have a solar drying system for around 150 Ton of sludge spread over 12 acres. After the completion of this STP, a major flow of discharge will be stopped from flowing into the Yamuna. The treated water from this STP will be utilised for various purposes, such as in groundwater recharge in Asola Bhatti Mines and surrounding areas, rejuvenating lakes, water bodies and surplus water will be released into the Yamuna,” the Delhi Jal Board said in a statement.

In addition to this, two existing STPs of 72 MLD and 136 MLD will continue to function in the Okhla STP complex. “This will make the total treatment capacity of the Okhla STP complex 771 MLD.  Out of these, 136 MLD is already achieving advanced parameters of less than 10 mg/L Biochemical Oxygen Demand (BOD) and Total Suspended Solids (TSS), it added.