A wastewater treatment plant works is an industrial structure designed to remove biological or chemical waste products from water, thereby permitting the treated water to be used for other purposes. Functions of wastewater treatment plants include:
Sewage treatment – treatment and disposal of human waste, and other household waste liquid from toilets, baths, showers, kitchens, and sinks.
Industrial wastewater treatment – the treatment of wet wastes from manufacturing industry and commerce including mining, quarrying and heavy industries.
Agricultural wastewater treatment – treatment and disposal of liquid animal waste, pesticide residues etc. from agriculture.
