New Delhi, Aug. 8 -- The Delhi Jal Board (DJB) has launched a project to upgrade and expand the wastewater treatment capacity of the Yamuna Vihar Sewage Treatment Plant (STP) in northeast Delhi-part of the government's broader effort to improve the ecological flow in the heavily polluted Yamuna stretch between Wazirabad and Okhla.

A DJB official said the highly treated water from the Yamuna Vihar and Coronation Pillar STPs will be carried via a closed conduit and released into the river downstream of the Wazirabad barrage. "In the first phase, we are expanding the treatment capacity of the Yamuna Vihar plant from 25 MGD (million gallons per day) to 55 MGD, thereby adding 30 MGD of treated water into the system," the official said.

The p...