The separation of fine and colloidal particles takes a long time, so chemical coagulants are used to enlarge the particles and reduce the settling time. When the coagulant is added to water, some of it is used to adjust the electrical potential of the particles, and some of it is combined with the alkalinity of the water.

Abrizan Industrial Research Knowledge Company, located in Fars Science and Technology Park, has been operating for more than twenty years, producing more than 180 specialized and mostly exclusive products in the field of chemical treatment of industrial waters and wastewater under the Mitreh brand. The company's solutions have different types with different applications.