As clean water becomes more scarce and valuable around the world, the importance of preparing water of appropriate quality for various water uses is increasing. Meeting the drinking water needs of cities and special quality requirements for industrial, commercial and domestic uses is the vital task of water treatment engineering.
TETRA SURFACE WATER TREATMENT SYSTEMS
Technologies used include coagulation-flocculation-simple or lamellar precipitation, pressurized or gravity rapid sand filtration, slow sand filtration for clarification of turbid and humic waters; ion exchange for hard water treatment, ion exchange for salinity removal and reverse osmosis; biological treatment for the removal of organic substances, There are active carbon adsorption, chlorination, ozonation and ultraviolet methods for disinfection.
COAGULATION:
Chemicals are added to the water in order to turn the non-precipitating colloidal substances and slowly precipitating suspended solids in the raw water into rapidly precipitating flocs. Rapid mixing by adding chemicals to the water, destabilizing the colloidal and suspended solids and combining the destabilized solids are called coagulation.
FLOCULATION:
Flocculation is the process of combining the small flocks destabilized as a result of the coagulation process by slow mixing and forming large flocs that can settle quickly. Slow mixing is done by mechanical mixing, air mixing and hydraulic mixing.
FILTRATION:
Filtration is the process of passing the water through a filter medium in order to retain the unsettled suspended solids in the chemically coagulated and precipitated raw water and to obtain high quality drinking water.
