In operation, fresh chemicals are injected into raw water being pumped at a constant rate into the clarifier center mixing well where it is contacted and mixed with recycled chemicals and solids pumped from the sludge blanket by a recirculation pump. The coagulated water is distributed to a larger flocculation well where the chemical reactions forming insoluble floc particles are completed. The particles increase in size as they contact and adhere to each other.
The Enviroquip Solids Contact Clarifier is a high rate, vertical flow treating unit combining chemical mixing, flocculation, coagulation, settling and clarification in a circular tank. Applications of this unit for water treating are lime softening, color removal and turbidity removal.