Wastewater reuse has is being practiced in various countries for providing freshwater resources. Qatar generates more than 2 million cubic meters of wastewater in the form of household and industrial waste (Gleik, Cooley and Morikawa, 2008). Out of which about 35% can be treated and reused. Doing so will fulfill 50% of the household demand of water in Qatar. The cost per cubic meter ($0.49) is also lower as compared to the water obtained from desalination (2$ per cubic meter). Moreover wastewater treatment also resolves the issue of water pollution because the water is treated and reused instead of discharging into land which pollutes land and underground water resources. Another advantage of the reuse of wastewater is the localized nature of water supply system because the wastewater generated by a certain locality can be treated and reused by the same locality. This resolves the complicated issue of supplying water to long distances.Desalination is the removal of the salt and minerals from seawater by the application of various processes. The desalinated water is fit for human consumption and use in irrigation and agriculture.9% of the water supplied in Qatar is through the desalination of wastewater. Water Pollution.
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