Clarifiers:

Clarifiers work on the principle of gravity settling. The heavier suspended solids settle in the clarifier. The settled solids are swept to the centre well provided for collection of sludge with help of moving scraper blades.

Many a times the natural settling is enhanced by addition of coagulant & polyelectrolyte. The coagulant neutralizes the charges & agglomerates the suspended solids to form micro-flocs. The polyelectrolyte brings together these micro-flocs binding them with long chains to make heavy flocs which easily settle down. Most of the waste waters contain some scum material which does not settle down & needs to be collected on the surface of the clarifier. Hence a scum removal arrangement is normally provided.

Clarifiers are settling tanks, built with mechanical means for continuous removal of solids being deposited by sedimentation. Sedimentation has been the mainstay process for solid-liquid separation in the wastewater industry since its inception. We combines technical and manufacturing expertise to provide quality solutions for every need.

Velocity of water being introduced into the clarifier gets reduced and clarifier increases the hydraulic retention time which indeed helps efficient separation of particles from water. Clarifiers are mainly used to reduce the suspended solids and the turbidity which are present in the water.

Depending on the feed water quality, the pretreatment process may consist of following treatment steps:

• Removal of large particles using a coarse strainer.
• Water disinfection with chlorine.
• Clarification with or without flocculation.
• Clarification and hardness reduction using lime treatment.
• Media filtration.
• Reduction of alkalinity by pH adjustment
• Addition of scale inhibitor.
• Reduction of free chlorine using sodium bisulfite or activated carbon filters.
• Water sterilization using UV radiation.
• Final removal of suspended particles using cartridge filters.

We provide advanced and efficient range of various water clarifiers. Our range of clarifiers includes pretreatment clarifiers, Lamella clarifiers, flocculators, Tube settlers, high rate solid contact clarifiers (HRSCC) etc. As each plant has specific needs, Agravarti can recommend and provide reliable, robust mechanisms to ensure optimal performance for any given application.