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What is the different between flocculauulation value and coagulating power?

What is the different between flocculauulation value and coagulating power?

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago
Coagulation and flocculation are two methods to separate out the suspended particles in a solution. Coagulants and flocculants are formed to assist these processes. Though coagulation and flocculation are used interchangeably, they are two distinct processes.Coagulants with charges opposite those of the suspended solids are added to the water to neutralize the negative charges on dispersed nonsettlable solids such as clay and colour-producing organic substances.Flocculation, a gentle mixing stage, increases the particle size from submicroscopic microfloc to visible suspended particles.The microflocs are brought into contact with each other through the process of slow mixing. Collisions of the microfloc particles cause them to bond to produce larger, visible flocs called pinflocs. The floc size continues to build through additional collisions and interaction with inorganic polymers formed by the coagulant or with organic polymers added. Macroflocs are formed. High molecular weight polymers, called coagulant aids, may be added during this step to help bridge, bind, and strengthen the floc, add weight, and increase settling rate. Once the floc has reached it optimum size and strength, the water is ready for the sedimentation process. Coagulation involves the addition of chemicals (coagulants) during relatively intense mixing to destabilize naturally occurring particles and macromolecules and/or to precipitate additional particles.
 In flocculation, a period of less intense mixing is used to promote the aggregation of destabilized particles into larger flocs that can be removed subsequently by sedimentation and/or filtration. During coagulation and flocculation, various dissolved ions and molecules may be adsorbed by particles or may be precipitated, depending on the type and concentration of species considered and on the overall solution chemistry.
 

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