Chemical Precipitation

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The removal of metals and other inorganics, suspended solids, fats, oils, greases, and some other organic substances from wastewater is generally done through chemical precipitation. Through precipitation, contaminants that are either dissolved or suspended in the solution are made to settle as a solid precipitate, which can then be either filtered, centrifuged, or separated from the liquid portion. The precipitation process is assisted through the use of a coagulant (e.g., polymers), which combines suspended smaller particles to form larger aggregates in the solution.

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