Transcription of Lecture 5: Coagulation and Flocculation
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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.
4) 3. 14-18 H 2 O lumps or powder acidic Sodium aluminate NaAlO 2 or Na 2 Al 2 O 4 Powder alkaline Poly-aluminiumchloride Al n (OH) m Cl 3n-m Solution or powder acidic Ferric sulfate Fe 2 (SO 4) 3.9H 2 O Small crystals acidic Ferris chloride FeCl 3. 6H 2 O Lumps or solution acidic Ferrous sulfate FeSO4. 7H 2 O Small crystals acidic
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