T2 - CIVL 242 Tutorial TA: Pang Shing Kin So Wing Kin...

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CIVL 242 Tutorial TA: Pang Shing Kin ([email protected]) So Wing Kin ([email protected])
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Content Coagulation/ Flocculation Colloid Coagulation Theory
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Coagulation/ Flocculation A two-step process whereby small particles become large particles (flocs). 1. Particle destabilization (to make particles “sticky”) Chemistry 2. Particle transport and contact (collisions) Physics
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Coagulation/ Flocculation The coagulation-flocculation processes facilitate the removal of SS and colloidal particles Definitions: Coagulation is the destabilization of colloidal particles brought about by the addition of a chemical reagent called as coagulant. (reduction of the surface charges on the particles) Flocculation is the agglomeration of destabilized particles into microfloc and after into bulky floccules which can be settled called floc. The addition of another reagent called flocculant or a flocculant aid may promote the formation of the floc.
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Colloid Double layer - Stern layer - Diffuse layer
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This note was uploaded on 09/13/2011 for the course CIVL 242 taught by Professor Gh during the Fall '09 term at HKUST.

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T2 - CIVL 242 Tutorial TA: Pang Shing Kin So Wing Kin...

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