Flocculator
Flocculator is a unit operation. It is used in water treatment and Waste water treatment. It helps to reduce Suspended and Colloidal Impurities.
Process Description :-
Flash or rapid mixing stage consists in adding chemicals to raw water to foster coagulation, attracting particles which do not settle or are not filtered. Attracted by coagulants, such as ferric chloride (FeCl3), PAC (poly aluminum chloride Al2Cl (OH)5), aluminum sulphate (Al2(SO4)3), these particles are then easy to agglomerate during the flocculation stage. The duration of the flash mixing stage is a key factor and determines the quality of the whole process: too short retention time will not ensure a homogeneous distribution of the chemicals within the basin volume, resulting in an unsuccessful reaction. On the other hand, too long retention time will lead to coagulant overdosing, preventing the process efficiency. Therefore, it is essential to carefully calculate the residence time taking into consideration several parameters including the reactor volume and the water flow rate.
Target Impurities :-
- TSS
- Turbidity
- BOD
- Colloidal Particles
- Partial Color
Advantages :-
- Water is quickly mixed
- Low Cost and No Maintenance
- Fast Sedimentation
