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Tuesday, Sep 17, 2019

Sulabh technology to clean Ganga

Sulabh International, a pioneer in the field of Sanitation the world over, has achieved a major breakthrough by successfully developing a new technology to clean Ganga and Yamuna rivers.

delhi Updated: Aug 17, 2007 20:01 IST

Hindustan Times

Sulabh International, a pioneer in the field of Sanitation the world over, has achieved a major breakthrough by successfully developing a new technology to clean Ganga and Yamuna rivers.

The Founder of Sulabh Movement, Dr Bindeshwar pathak, the brain behind this innovation claimed that the new technology will not only save rivers from pollution but this would help tackle the water shortage problem upto some extent.

Addressing a Press Conference, Dr Pathak said that this charcoal Ultra Violet filter of water, developed by researchers in Sulabh International, treats waste water from human excreta based biogas plant. The treated water is colourless, odourless and pathogen free. Its BOD (Biological Oxygen Demand) is less than 10 mg per liter which is quite safe for fish culture, irrigation and horticulture.

Such waste water which is being collected in this process can also be used for beneficial purposes or discharge in any water body/river without causing any pollution. This type of decentralized system of waste water is the important and affordable solution to over the problem of waste water pollution in the Holy Rivers like Ganga and Yamuna.

Dr Pathak hoped that this new technology will give a major boost to the dream project of late Prime Minister Mr Rajiv Gandhi who launched Ganga Action plan in 1986 for the Ganga River. “In addition to nitrogen, potassium and phosphate this water contains all plant, micronutrients required for the growth of plant" Dr Pathak said adding that the water has advantages of inorganic fertilizer in many ways as it improves soil texture and does not cause acidity or alkalinity of the soil besides improving the growth of microorganisms in the soil.

The design developed by Sulabh does not require manual handling of human excreta and there is complete recycling and resource recovery from the waste. A digester is made underground into which excreta from public toilets flows under gravity. Inside the digester biogas is produced due to anaerobic fermentation by the help of methanogenic bacteria. The biogas, thus produced, is stored in inbuilt liquid displacement chamber. This biogas is then utilized for power generation with the help of a device which is also designed indigenously by Sulabh scientists. The produced biogas from human excreta is being used for other various purposes also like cooking and lightings by using gas burners and mantle lamps. Besides, it can be used as fertilizer as it contains good percentage of nitrogen, potassium and phosphate.

Dr Pathak further stated that his organization has succeeded in designing door and window planks out of biogas byproducts.
For the disposal of wastes from public toilets, high rise buildings, housing colonies, the Sulabh technology is the best and safest way to generate power without any running cost. This discovery would certainly help in solving the needs of fertilizer and electricity upto some extent in days to come, Dr Pathak added.

It may be mentioned here that Dr Pathak had introduced two-pit toilet technique which became very popular throughout the world. The Sulabh technology is scientifically appropriate, economically affordable and culturally acceptable by several international organizations like the World Bank, WHO, UNICEF and UNDP.

First Published: Aug 17, 2007 19:57 IST