Transcription of Lecture 5: Coagulation and Flocculation
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Lecture 5: Coagulation and Flocculation
Lecture 5: Coagulation and FlocculationPrepared byHusam Al-NajarThe Islamic University of Gaza-Environmental Engineering DepartmentWater Treatment (EENV-4331)Colour in wateris a water treatment process that causes very small Coagulationsuspended particles to attract to one another and form larger particles. consist of adding a floc-forming chemical reagent to a water to enmesh (catch) or combine with non-settleablecolloidal solids and slow-settling suspended solids to produce a rapid-settling floc. is a water treatment process following Coagulation , Flocculationwhich uses gentle stirring to bring the suspended particles together so they will form larger more settleableclumps called floc. DefinitionsMany of the contaminants in water contain matter in the colloidal form. These colloids result in a stable suspension.
The magnitude of these forces is measured by the zeta potential, which is: where: ... intermolecular, or van der Waals, attraction. Coagulants can be used to reduce the electrostatic repulsive ... In water treatment two main types of coagulants are used i.e. aluminum and iron salts. Type of coagulant formula most common
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