Journal of Research in Engineering and Applied Sciences JREAS, Vol. 1, Issue 03, July 2016 141 GREY WATER TREATMENT AND MANAGEMENT : THE POTENTIAL OF GREYWATER SYSTEMS TO AID SUSTAINABLE WATER MANAGEMENT 1 2 3 4 Y.D Chintanwar , Paras Batra , VikashKumar , Rushabh Gour , 5 6 7 Sumant Chorey , Nikhil Yeole , Ravikant Kumar 1 2,3,4,5,6,7 Asst.Professor, Students Department of Civil Engineering, Priyardarshini J.L. College of Engineering, Nagpur, 440009, Maharashtra, India. Abstract According to the statistics about 71 % of the Earth's surface is water covered and the oceans hold about 96.5 % of the earth's water and rest is the considered as fresh water or portable water . Water uses in the world has increased at a pace exceeding our population growth, with developing countries using more water than the rest of the world to maintain a standard of living. Developing countries are dealing with limited excess to clean water, one of the largest contributions to poor health. For the proper use and maintenance it is important that we start managing waste water in an efficient way. The waste water produced can be divided into two categories black water and grey water. Black water is used to describe wastewater containing feces, urine and flushwater from toilets and grey water is wastewater generated from household uses like bathing and washing clothes. Black water treatment is done on a very large scale in India, whereas it is 30% of the total waste water produced and the greywater is 70 % of the waste water produced. Grey water is a source of wastewater that can be treated for reuse much simpler than current mixed sewage or black water. Treatment of grey water will increase the amount of water that can be reused for various purpose and that will eventually help the developing contrary such as India to fight there water crises. This paper present information on grey water and its treatment that may help to manage the waste water efficiently Key Words : Grey water, Grey water reuse 1. Introduction As pressures on freshwater resources grow around the world and as new sources of supply become increasingly scarce and expensive efforts are underway to identify new ways of meeting water needs. Efforts are taken all over the world to save water and efficiently reuse the wastewater, thus grey water treatment and its reuse is an effective way to face the problem of water crises as it is produced on a large and regular basis. Grey water, defined slightly differently in different parts of the world, generally refers to the wastewater generated from household uses like bathing and washing clothes. This wastewater is distinguished from more heavily contaminated “black water” from toilets. In many utility systems around the world, grey water is combined with black water in a single domestic wastewater stream. Yet grey water can be of far higher quality than black water because of its low level of contamination and higher potential for reuse. When grey water is reused either onsite or nearby, it has the potential to reduce the demand for new water supply, reduce the energy and carbon footprint of water services, and meet a wide range of social and economic needs.In particular, the reuse of grey water can help reduce demand for more costly high-quality potable water 2. Source and Generation of grey water Statistically 70% waste water generated is grey water and 30% is black water .the source of grey water are hand basin , laundrey , kitchen and bathroom. Fig. 1 : Pecentages of grey water and blackwater from wastewater produce (Rafat Khalaphallah et al., 2012)