The polluted water can be detoxified and neutralized through treatment processes. The different treatment processes that control pollution are:
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i) Physical treatment
This treatment process includes phase separation method which is a three step process- logging, prolonged storage in tanks and sludge drying beds.
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ii) Chemical treatment
This kind of treatment is done for complete breakdown of hazardous waste from water bodies. As a result of this treatment, chemical properties of wastes can be modified (properties like solubility and pH of sample). The technique involves oxidation, chemical reduction, neutralization, heavy metal precipitation, oil/water separation and solvents / fuels recovery.
iii) Biological treatment
The total impurities obtained from physical and chemical treatment of sewage are sludge, which is given biological treatment before disposal
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iv) Solidification
This treatment process convert the liquid waste into insoluble rock-hard material and are used as pretreatment processes before landfill disposal. This is done by mixing waste with various reactants to produce a solid mass.