High Rate Solid Contact Clarifier

This Clarifier is a high rate, solid contact, sludge recirculation in minimum space and using a minimum amount of chemicals, produces an effluent of the highest quality. Used for clarification, lime softening, Silica reduction or organics reduction of water & waste waters containing suspended solids, colors and organic impurities. It provides means for chemical addition and mixing, flocculation and up flow clarification in a single unit.

  • The mechanism would be of centrally driven type with fixed full bridge (Lattice type) spanning the tank diameter with necessary walkway and handrails to access drive unit at the centre.
  • Two more truss fabricated structures shall be placed at 90ยบ to the bridge spanning the tank diameter to help suspend and hold the drat tube and detention hood.
  • Clarifier Drive unit consisting of Drive head (Worm shaft & worm gear) connected to Gear Box by Chain & sprockets and the Gear box connected to Motor by Love joy Coupling.
  • Main Vertical solid inserted into the Clarifier Drive head gear bore and keys locked, suspended freely, flange facing downwards.
  • An intermediate Scraper arm shaft made out of Heavy duty pipe suspended from the vertical shaft.
  • Two Scraper arms, rigidly fabricated to sweep the tank floor with Scraper blades, Neoprene Rubber squeezes and Strips to hold Squeezes.
  • Suitable Central Sludge well scraper.
  • Recirculation system will be placed between the top and bottom portions of the bridge.
  • Main Nylocast driven gear bolted to the drive bearing and seated on the main vertical shaft between the aforesaid pair of bearings.
  • Driven gear connected to the drive gear which is mounted on the Gearbox output shaft and input shaft connected to Motor by coupling.
  • Recirculation shaft made out of heavy duty pipes and bolted to the driven gear bottom face.
  • Impeller for recirculation bolted to the shaft.
  • Suitable diameter of Draft tube for dozing and mixing suspended from the bridge bottom and properly reinforced. Inlet nozzle with flange at the bottom tangentially placed for Feed entry.
  • Suitable diameter of Detention hood made out of FRP fixed for flocculation.
  • Painting.


  • Weir plates with Anchor fasteners on outlet launder peripheral.
  • Radial collectors between the Detention hood and RCC launder for effluent collection.
  • Mechanical over load protection device with proximity sensors mounted on Drive head.