The purpose of wastewater treatment is to treat or
reuse wastewater that is harmful to human health and environmental safety. The
design of the wastewater treatment system varies depending on the quality
expectations of the effluent and how much organic matter is desired to be retained.
Wastewater treatment is done for the reuse of water or to separate the harmful
substances and return the water to the nature.
Both conventional and membrane technology are used in
wastewater treatment. Wastewater is the only water resource in the world that
increases with economic activity. Wastewater recovery significantly reduces
water waste.