Abstract
Industrial revolution brought diversified industries to produce goods to meet the demand of increasing population. Such a rapid growth of industrial sector caused water pollution to a great extent. Dairy industry is not an exception, causing significant water pollution. The dairy sector in India grew at a rate of 6.4 per cent annually in the last four years against the global growth rate 1.7 per cent demonstrating significant increase in milk productivity. Around 80 million rural Indian households are engaged in milk production with very high proportion being landless, small and marginal farmers. But on the other hand, water pollution being caused from these dairy industries is quite significant. Various biological treatment technologies were tried for treating dairy wastewater. An attempt has been made by the authors of the present paper to design aerated lagoon including screen chamber, primary clarifier, quiescent settling zone and sludge disposal with success to treat dairy wastewater.
Highlights
The Dairy Industries are growing on a rapid pace globally to meet the demand of milk and its product
Treatment of dairy water can be treated with various treatment technologies depending upon the locational specific conditions like availability of land, surroundings, economic viabilities, and acceptability
The Aerated lagoon would seem to be a useful system for www.openaccesspub.org the treatment of dairy wastewater
Summary
The Dairy Industries are growing on a rapid pace globally to meet the demand of milk and its product. With the high consumption of dairy products in the form of pasteurized and sour milk, yoghurt, cheese, cream and butter products, ice cream, milk and whey powders, and so on so forth, the production capacity of milk and its products corresponding enhanced by way of new dairy industries and optimization of existing capacities This has resulted into increased waste water generation leading to environmental problems [1]. Production processes like pasteurization or homogenization produce wastewater with high levels of Biological oxygen demand (BOD) and Chemical Oxygen Demand (COD) along with pathogens and odor Such a waste water is subjected to lack of oxygen which allow anaerobic bacteria to proliferate (turn septic) and cause odour problems and need to be controlled before being discharged to municipal treatment facilities [3]. These systems may be classified into three basic systems as shown under:
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