The Delhi Jal Board (DJB) has awarded a tender of ₹64 crore for the construction of a 25-acre lake, walkways, park benches and playing areas in Rohini.
The lake will use recycled water.
“Of the total 25 acres, there will be landscaping and walkways on 14.5 acres and the lake will cover an area of about 10 acres. The project is expected to be completed in 18 months,” said Ankit Srivastava, technical advisor of the DJB.
The project was approved by the DJB last year.
The water in the lake will recharge the groundwater and the overflowing water will go into harvesting pits.
Recycling process
The lake will be next to a sewage treatment plant (STP) in Rohini and recycled water from it will be used for it. The treated water from the STP will have BOD level of 30mg/l and it will be brought down by a wetland system.
“The water will be passed through gravel, plants and certain types of bacteria to bring down the BOD level to 10 mg/l,” an official said. Then the water quality will be further enhanced in the the lake by using airation system and providing sufficient retention time in the lake.
Natural flora, fauna
“There will be certain floating plants which will also increase the quality of water and the BOD level will be brought down to 3 mg/l in the lake. The area will have natural flora and fauna,” the official said.
