In a bid to bridge the gap between demand and supply of water in the city, the Delhi Jal Board (DJB) has recently installed filling points for treated effluent at major Waste Water Treatment Plants (WWTPs) at Kondli, Rithala, Coronation, Keshopur, Mehrauli and Okhla.
With this the DJB shall offer its treated effluent produced at its WWTPs for non-potable purposes, such as irrigation, horticulture, power plants, water bodies, construction activities and so on. "The Biochemical Oxygen Demand (BOD) of the treated grey water stands at <=20 ppm and the Total Suspended Solids (TSS) stands at <=30 as well, making it usable for non-potable purposes," said a DJB official. Subsequently, DJB has written to a number of Government agencies such as PWD, NDMC, EDMC, NTPC and others, encouraging them to use treated effluent."DJB is the only public utility in India that recycles and uses 40 per cent of its treated effluent. This is more than the benchmark of 20 per cent as stated by the Urban Development Norm regarding the extent of recycling treated effluent,” the official said.
“By December 2012, Delhi Jal Board recycled about 142.4 Million Gallons per Day (MGD) of treated effluent and efforts are being made to promote more usage of the treated effluent for non-potable purposes," added the official.