Colloids is dissolved and suspended in groundwater and surface water. To extract dissolved and suspended colloids from liquids, coagulation is required.
Various wastewater flow amounts and characteristics are found in industrial factories, depending on the manufacturing facilities.
Projecting treatment plants is a multidisciplinary field of engineering. So that most of the treatment systems incorporate divisions of engineering fields such as geological, mechanical, geomatic, and electrical engineering.
The method of separating pollutants from drainage and domestic sewage water is known as sewage treatment.
Since this treatment requires microorganisms, it is distinct than that of physical or chemical threatments. There are two types of biological treatment systems.