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Recycled Sewer Water To Turn City Greener  
Source:   Water Pollution City   : Mumbai Published On   21-10-2009  

 

Amid continuing water crisis in Mumbai, the Brihanmumbai Municipal Corporation BMC is all set to use recycled sewer water to turn the city greener.

In a first of its kind project, the civic body will use recycled sewer water to create greenery at Gorai and Deonar dumping grounds. It also plans to sell the water to city malls for maintaining its gardens and for non-potable purposes.

The civic administration will supply raw sewer water to United Phosphorus Ltd and Dutch firm Wan Der Veil, the contractors responsible for the closure of the Gorai dumping ground, to recycle it.

According to sources, a water treatment plant that can recycle five million litres of water a day will be set up at Gorai dumping ground.

There will be huge water requirement to turn the dumpyard greener. Usage of sewer water will only help the greenery thrive, said a senior civic official.

Similarly, Deonar dumpyard will also be made greener by using recycled sewer water after setting up a plant, which can recycle 20 MLD water. According to sources, contractors United Phosphorus Ltd, Kerala-based POABS and Germany-based MDSE will be responsible for carrying out the work.

Work on the plant at Gorai dumpyard is expected to start soon. According to sources, garbage is being scientifically composed at Gorai dumpyard. The BMC plans to make use of a five hectare plot at the dumping ground by making a green open space and a golf club in future.

With Mumbai already reeling under a severe water crisis, the civic administration has turned towards recycled sewer water to make its optimum utilisation for non-potable purposes. The city generates around 2,600 MLD of sewage water, of which only 1,600 MLD water is treated primarily.

Under its Mumbai Sewerage Disposal Project MSDP, BMC has already started setting up seven plants in city, eastern and western suburbs Versova and Bandra 400 MLD, Worli, Ghatkopar and Bhandup 300 MLD, Malad 700 MLD and Colaba 40 MLD to treat sewer water.

While the original plan was to treat the water up to tertiary level up to 95 per cent and is as good as potable water and release it to Arabian Sea, officials said in view of water shortage, the recycled water will be sold to private organisations and will also be used by the civic body.

Treatment of sewer water till the maximum level will incur Rs 10 per kilolitre 1,000 litres. Currently, the rate is only Rs 3.5 per kilolitre. While the use of treated sewer water for other non potable purposes is restricted, officials said it can be used effectively for gardening.

There are a number of malls in Andheri and Juhu. We plan to supply recycled sewer water to them from the Versova plant so that they can use it for gardening.

They can also use this water for flushing and cooling of air conditioning system that has huge requirement of water, said an official attached to the Sewerage Operations department.

The BMC has also received requests from Golf Club, Race Course, Rashtriya Chemicals and Fertilisers RCF for raw sewer or treated sewer water for gardening purposes.

 
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