Primary and secondary clarication


 

 

Primary treatment of sewage is removal of floating and settleable solids through sedimentation. Primary clarifiers reduce the content of suspended solids and pollutants embedded in those suspended solids. Because of the large amount of reagent necessary to treat domestic wastewater, preliminary chemical coagulation and flocculation are generally not used, remaining suspended solids being reduced by following stages of the system. However, coagulation and flocculation can be used for building a compact treatment plant (also called a "package treatment plant"), or for further polishing of the treated water.

 

 

 

PRIMARY PURPOSE:
* Remove solids that pass through headworks and grit equipment.
* Lessen organic loading on following biological process
* Buffer flow and load stabilization to secondary process / split stream treatments.

 

Sedimentation tanks called secondary clarifiers remove flocs of biological growth created in some methods of secondary treatment including activated sludge, trickling filters and rotating biological contactors.

 

PRIMARY PURPOSE:
* Separate and remove solids/biomass produced in biological process in manner that suits process goals (rapid sludge removal, detention time, etc.).
* Thicken solids for recirculation and process reuse.
* Store biomass as buffer to prevent process upsets.


 

 

Primary treatment of sewage is removal of floating and settleable solids through sedimentation. Primary clarifiers reduce the content of suspended solids and pollutants embedded in those suspended solids. Because of the large amount of reagent necessary to treat domestic wastewater, preliminary chemical coagulation and flocculation are generally not used, remaining suspended solids being reduced by following stages of the system. However, coagulation and flocculation can be used for building a compact treatment plant (also called a "package treatment plant"), or for further polishing of the treated water.

 

 

 

PRIMARY PURPOSE:
* Remove solids that pass through headworks and grit equipment.
* Lessen organic loading on following biological process
* Buffer flow and load stabilization to secondary process / split stream treatments.

 

Sedimentation tanks called secondary clarifiers remove flocs of biological growth created in some methods of secondary treatment including activated sludge, trickling filters and rotating biological contactors.

 

PRIMARY PURPOSE:
* Separate and remove solids/biomass produced in biological process in manner that suits process goals (rapid sludge removal, detention time, etc.).
* Thicken solids for recirculation and process reuse.
* Store biomass as buffer to prevent process upsets.

Other Products in this Category