Waste Water To Producer Edible Fish

Sewer and waste water gushing from urban centres in huge quantities daily need not be viewed merely as a source of pollution for rivers, canals and other water channels. It is indeed a valuable resource, rich in a variety of highly useful nutrients and micro-organisms which can be gainfully utilised to produce edible food in the form of fish, prawns, rice and vegetables. Many countries in the West Asia, South-East Asia, Europe and Russia are making full use of the waste water for producing human food. India is also now trying to catch up in this field thanks to the indigenous technology developed for this purpose by the waste water aquaculture division of the Central Institute of Freshwater Aquaculture at Rahara, near Calcutta. Estimates have it that as much as 15,000 million litres of waste water flows out of the country