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Coagulation

Similar term(s): coagulate.

Definition:

The clumping together of very fine particles to form larger particles; caused by the use of chemicals (coagulants). The chemicals neutralize the electrical charges of the fine particles and cause destabilization of the particles. The clumping together makes it easier to separate the solids from the water by settling, skimming, draining or filtering.

Source: US EPA Drinking Water Glossary 

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