The design features of the solids contact type clarifier provide the three zones necessary for proper clarification: Rapid mix zone, where raw water, recirculated precipitates and fresh reagents are rapidly mixed together. Slow mix zone,where gentle mixing permits floc formation and brings the floc into intimate contact with the suspended impurities.

The design features of the solids contact type clarifier provide the three zones necessary for proper clarification: Rapid mix zone, where raw water, recirculated precipitates and fresh reagents are rapidly mixed together. Slow mix zone,where gentle mixing permits floc formation and brings the floc into intimate contact with the suspended impurities.