Municipal wastewater is liquid waste that comes mainly from sanitary facilities, kitchens, washing machines and generally from cleaning processes of homes, offices, shops, etc.
Liquid industrial waste is waste that is disposed of from buildings and premises used for any
commercial or industrial activity and which are not domestic waste water or rainwater (Directive 91/271 / EEC 21.05.1991).
The treatment of municipal wastewater and industrial waste aims to protect all natural recipients from the constantly threatening pollution.