Stainless Steel Equipment for Primary and Secondary Clarifiers - Circular and Rectangular
The inflow into primary clarifiers is a raw wastewater arriving from the grit trap. Organic and mineral solids are separated in the primary clarifier by sedimentation and removed as primary sludge. Secondary clarifiers should remove as much as possible of the biological sludge,activated sludge or trickling filter sludge, from the wastewater.
To achieve a clear effluent and an superior effluent quality meeting all standards, virtually all floating and suspended solids must be removed from the effluent and retained in the clarifier. The peak flow during storm events is critical for the design of the clarifiers. If the sludge layer rises too high there is a risk of sludge overflowing with the effluent. Sludge overflowing must be prevented in any case to comply with the consent standards.