Abstract
The growth in population leads to significantly increasing the water demand. Thus, the disparity between demand and supply for water has become an important problem in human life. One of the most effective solutions to overcome this disparity is to manage urban water. Greywater, a significant part of domestic wastewater or sewage, can play an essential role in the urban environment. To address this role, the current paper aims to provide families with some efficient, affordable and sustainable systems to treat greywater. For non-drinking services, treated greywater may be used in various applications such as irrigation, toilet-flushing, car-washing, etc. Around the world, there are several types of greywater treatment systems. A study of these processes has been undertaken to assess the most appropriate activities at the family and community level. The best techniques for treating greywater in this study, constructions wetland (C.W.) instead of other techniques, as this is a sustainable, low-cost and easy-to-apply technology. The use of grey water is important because it decreases the demand for fresh water and decreases treatment stress.
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