Domestic wastewater (sewage) treatment, is the process of removing contaminants from wastewater and household sewage, both runoff (effluents) and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants.
This material is often inadvertently contaminated with many toxic organic and inorganic compounds. The objective of sewage treatment is to produce an effluent which can be disposed of without causing harm to public health or creating pollution.
Industrial wastewater treatment involves a range of processes to treat waters that have been contaminated in some way by industrial activity – prior to their re-use or release into the environment.
Recent technological trends have focussed on minimising the production of such waste or on recycling it within the production process. However, many industries remain dependent on processes that produce wastewaters.
The goal of water purification is to produce water fit for a specific purpose. Most water is purified for human consumption but water purification may also be designed to meet the requirements of medical,