CoAgulation Flocculation

Coagulation/flocculation water treatment technology is typically applied to remove suspended particles and/or emulsified oils from water.

Particles are suspended due to natural ionic charges (e.g., common charges) that are present in the water.  In the case of emulsified oils, the use of cleaning agents (i.e., degreasing agents, detergents, surfactants, etc...) create similar ionic charges around oil droplets.  In either case, these common charges (negative to negative, or positive to positive) create repelling forces in water that suspends the matter.

Coagulation The purpose of coagulation is to neutralize the repelling charges and to allow the matter to gather (agglomerate).  For most wash water and industrial wastewater applications, coagulation can be accomplished by mixing a chemical coagulant (a cationic positive charged chemical) into the water, or by applying Electro-coagulation (an electrolytic process using an electrolytic sacrificial cell and DC current) to the water. 

Flocculation The purpose of flocculation is to create additional adhesion between the agglomerated matter by mixing a flocculent chemical into the water.  The process creates larger agglomerations and adds molecular weight to the matter, which enhances the separation and removal process of the contaminants from the water.

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EC2-20A