These clarifiers settle the suspended matter from pre-flocculated water or effluent. The clarifiers are constructed in Metal as well as RCC depending on the size and are equipped with scrapers, scraper drives, stationary or moving bridge, collecting launders, wear plates, V-notch boxes etc.

A variant in this equipment called Clari-flocculator combines flocculation zone along with the conventional clarifier mechanism. This eliminates the need of having a separate equipment for flocculation. The settling is aided by virtue of gravity with carefully designed hydraulic flows and the sludge blanket formed with TSS also traps finer particles to provide clear water at the outlet.