Coagulants and Flocculants
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| Coagulants and Flocculants |
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The leading applications for coagulants and flocculants include paper, municipal wastewater, municipal water, industrial wastewater, industrial water, and mining. Coagulants and flocculants used on microorganisms are of practical importance in wastewater treatment because flocculated organisms are relatively easy to collect from the various streams in a wastewater treatment plant. Chemical coagulation of biologically treated waste waters is most often the initial step in water renovation systems. Coagulants used today generally consist of alum, lime or a synthetic polyelectrolyte. Separation of the floc is accomplished by flotation or sedimentation.Both organic and inorganic products are used as coagulants and flocculants. Organic products account for roughly 70% of the market value and include such materials as polyacrylamides, polydiallyldimethyl ammonium chloride (poly DADMACs), and polyamines. Inorganic products include such materials as alum, iron salts, polyaluminum chloride (PAC), and blends of an inorganic with an organic polymer (IP blends). |