Water treatment is a process of making water suitable for its application or returning its natural state. It removes dissolved impurities like biological impurities and colloidal impurities in the waste water.Properly treating wastewater assures that acceptable overall water quality is maintained.It improves and purify the water, removing all of the contaminants, making it fit for reuse or discharge back to the environment.
The major important types of wastewater treatment process are Effluent Treatment Plants (ETP) Sewage Treatment Plants (STP). It is estimated that every year 1.8 million people die due to suffering from waterborne diseases. A large part of these deaths can be indirectly attributed to improper sanitation. Wastewater treatment is a process, wherein the contaminants are removed from wastewater as well as household sewage.