Coagulation
Coagulation
Physical-chemical process involved in Coagulation- ORGANIC COAGULANT Flocculation (polyamine,polyDADMAC) MINERAL COAGULANT R (AI,Fe") FLOCCULANT A E Decantation A 人 D A T W Flottation E Coagulation Flocculation R tank tank (flash mixing) (slow mixing) Filtration Coagulation-flocculation:The use of chemical reagents to destabilise and increase the size of the particles;mixing;increasing of flocs size. Source:SNF FLOERGER(2003)
Source: SNF FLOERGER (2003) Physical-chemical process involved in CoagulationFlocculation Coagulation-flocculation: The use of chemical reagents to destabilise and increase the size of the particles; mixing; increasing of flocs size
COAGULATION DIAGRAM Stable colloids Destabilized colloids Microfloc formation A Coagulation destabilises the particles'charges.Coagulants with charges opposite to those of the suspended solids are added to the water to neutralise the negative charges on dispersed non-settable solids such as clay and organic substances. Once the charge is neutralised,the small-suspended particles are capable of sticking together
Coagulation destabilises the particles’ charges. Coagulants with charges opposite to those of the suspended solids are added to the water to neutralise the negative charges on dispersed non-settable solids such as clay and organic substances. Once the charge is neutralised, the small-suspended particles are capable of sticking together
DIAGRAM OF FLOCCULATION Destabilized colloids flocculation Following coagulation, Bridging flocculation,a gentle mixing stage,increases the particle size from Floc formation submicroscopic microfloc to visible suspended particles
Following coagulation, flocculation, a gentle mixing stage, increases the particle size from submicroscopic microfloc to visible suspended particles. flocculation
Coagulation What is coagulation? coagulant) coagulant forms precipitate and added. procipitato, trapped impuritios trapping impurities settle to bottom Coagulation Flocculation Flash Mix Flocculation Basin Raw water ntation High Medium Low speed speed speed →
Coagulation