Definition - What does Coagulation mean?

Coagulation is a process used in water treatment. The water produced by the oil and gas industry is majorly wastewater stream that consists of dissolved and dispersed oil with high salinity levels. Coagulation is important in treating this water. The precipitation of colloids and ions are held in the solution by electrical charges. The colloids are then destabilized by adding the opposite charged ions. This process can be achieved by electrical or chemical methods.

Petropedia explains Coagulation

Coagulation is a chemical process used to treat water. The process is brought by the net surface charge reduction to a level where colloidal particles previously stabilized by electrostatic repulsion come close enough that the forces hold them and allow aggregation. A Coagulant is added as a suitable chemical substance.

This is the most accepted process that has been used to destabilize suspension for decades. It also effects the precipitation of inorganic species and allows their removal through filtration or sedimentation. Lime, Alum and polymers are the most widely used Coagulants.

This definition was written in the context of water treatment

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