Very soon Delhiites will be consuming the city’s waste water. Disgusting as this may sound, the technology to clean sewage for making water potable is already being used across the world. With raw water sources for Delhi highly limited, the capital will adopt this technology to recycle its waste water as well. Initially, 40 million gallons per day will be treated and added to raw water, which will be cleaned further at water treatment plants. This will help in meeting the drinking water demand of 3-4 million people in the city.
Delhi Jal Board and the government of Singapore have come to an in-principal agreement, and a memorandum of understanding will be signed between the two governments shortly. Singapore, which is meeting 10% of its drinking water needs by the ‘new water’ technology, will fund the entire consultancy for Delhi, including preparation of a detailed project report and tendering of the project.
The plan is to pick up 40 MGD treated effluent at the Coronation Pillar sewage treatment plant, treat it to a tertiary level, and release it into the river to return to Delhi as its raw water source. The water, in fact, will be released about 20-30km upstream of Wazirabad into the Yamuna, so that it can be diluted and additionally treated through natural processes like aeration and sunlight. It will then be cleaned again at the water treatment plant,” said Ramesh Negi, CEO, DJB.
Singapore will be spending about Rs 2 crore for the consultancy project and should be ready with the initial report within the next two to three months. Public Utility Board of Singapore is the agency that assisted Delhi with the initial planning of the project. Sources revealed that chief minister Sheila Dikshit and chief secretary P K Tripathi have visited the facility in Singapore. While Delhi will be putting its effluent through three stages of purification, Singapore reportedly claims that its tertiary treatment is sufficient to improve the quality of water sufficiently for consumption.
The project will entail setting up of a treatment plant at the Coronation Pillar SP site and laying of pipes to transport the treated effluent to the river. “The plant will be run on a public-private partnership model and we will open a global tender for its construction and operation. DJB will be paying the party on a per kilolitre of treated water basis.