Article courtesy of TNN | June 19, 2014 | The Times of India | Shared as educational material
NEW DELHI: Water-deficient Dwarka will get an additional 1.1 million gallons a day by January next year through IIT-Bombay technology that will purify sewage to provide potable water.
Delhi Development Authority has decided to test the technology being used by Brihanmumbai Municipal Corporation (BMC) for Dwarka. “We will be keenly watching the project’s development. If the project turns out to be successful in handling huge amounts of water, this could solve a lot of issues related to potable water across the capital,” said vice-chairman Balvinder Kumar.
The mechanism, which its inventors call the “soil bio technology”, will increase the 4MGD supply to the area to 5.1MGD. The peak demand of the sub-city is 12MGD. The source of the supply will be the Palam drain, which will be “bioremediated”- biologically treated with the use of organisms to remove or neutralize pollutants-to make the drain water, high in biochemical oxygen demand (BoD), hygienic.
“BoD is the amount of dissolved oxygen needed by aerobic biological organisms in water to break down the organic material in a sample at a certain temperature over a given period,” said an official.
A DDA official said the pilot project, on 5,000 sq m, would cost Rs 3.75 crore. By January, 5 million litres daily will be available which is equivalent to the supply from 50 tubwells.
“Kumar, along with a team of engineers and senior officers, assessed the proposal. The soil bio-technology is already being used by BMC and in other places,” said a DDA official.
DDA will implement the project jointly with Intach and Vision Earthcare, a company of the Society for Innovation and Entrepreneurship at IIT-Bombay. A tri-partite agreement will be inked to formalize the project.
DDA officials will visit the sites in Mumbai. The facility would be developed underground so the top layer of the soil can be landscaped and developed as a green area.