FABS 210 Lecture Notes - Lecture 19: Fecal Coliform, Cellulase, Gram-Negative Bacteria
16 Jan 2018
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Document Summary
Flocculation - ne particles are caused to clump together into a oc. Floc may oat to the top of the liquid ( creaming ) , settle to the bottom of the liquid ( sedimentation ) or be readily. It removes large particles and may pull down some colloidal material, as well as some microbes and ocs. Filtration - running water through various layers where things get caught in the lleted and removed from the system. Disinfection - get rid of microorganisms in the water. Coagulation - the chemical agglomeration of suspended material of varying size. Metal coagulants - iron or aluminum sulphates. Synthetic polymers - help the system along, the polymers get stuck to the coagulants making them bigger so they will settle out. Centrifugation if a good way to get colloids and clays out of the water although it is. Iron based coagulants - ferric sulphate is the main.
