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In drinking water treatment, cationic polymers are often used in combination with coagulants, such as aluminum and iron salts, to enhance the removal of turbidity and microorganisms. These polymers improve the efficiency of the coagulation-flocculation process, leading to clearer water with reduced pathogen levels. Moreover, the use of cationic polymers can also reduce the amount of chemical coagulants required, which is beneficial for both environmental and economic reasons.
cationic polymer used in water treatment

Another essential chemical in sewage treatment is alum, or aluminum sulfate. Alum is a coagulant used in the primary treatment phase to facilitate the removal of suspended solids and colloidal particles. By causing these particles to clump together, or coagulate, alum aids in their subsequent removal through sedimentation. This is particularly important in reducing the turbidity of wastewater, thus improving the efficiency of subsequent treatment processes. The addition of alum not only enhances removal rates but also aids in the stabilization of organic matter.
sewage treatment plant chemicals used
