6 Tips for Improving Coagulation, Flocculation and Clarification

[Editor's note: This article was first posted in May 2014. We occasionally pull articles out of our archives that offer value to new readers.] Coagulation, flocculation and clarification are common process steps at drinking water treatment plants. The general purpose of this sequence is to remove solids and turbidity from the water to produce clear product water and meet turbidity standards, expressed as NTUs (nephelometric turbidity units). Coagulation, flocculation and clarification can also remove bacteria and color from the water.First, coagulating chemicals are mixed with water in a rapid-mix step for even distribution. The chemicals cause particles in the water to clump