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3 Cards in this Set
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Conventional treatment of surface water involves a sequence of processes with the purpose of removing suspended sediment from the water then disinfecting |
Turbidity removal is at the center of treatment suspended particles physically shield microbes from disinfection interfere with other chemical processes and can serve as food for microbes on pipe walls as well as consumers are not pleased with cloudy water |
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Coagulation and sedimentation |
Coagulation is the destabilization of collodial particles they have an associated electrical charge. coagulants are used they form ions so they precipitate out as solid particles. this precipitate helps to group the collodial particles into big clumps called floc |
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The flock particles collide stick together to form larger particles through the flocculation process |
The mixture is slowly blended the flocculation speed should keep particles mixed so they do not settle out immediately, from the flocculation basin water slows as it moves into the sedimentation tank where velocity and gravity assist in settling floc particles into sludge at the bottom of the tank sludge is periodically removed where are further dewatering and disposal |
