摘要：The conventional methods of water treatment involve various water clarification processes whichinclude coagulation, flocculation, sedimentation and disinfection. Coagulation is a critical step in watertreatment because it involves removing the colloidal particles as well as pathogens that are oftenattached to the particles. These methods are often not suitable because of the high cost and lowavailability of chemical coagulants and disinfectants. Synthetic coagulants are not always available ata reasonable price and can leave undesirable residues in treated water. In the present study, theremoval efficiency of Moringa oleifera and alum were compared using different types of wastewater.The efficacy of two coagulants has been tested based on some critical parameters including dosagesof coagulant, pH, EC, TDS, hardness, DO and COD of turbid water and change in values of theseparameters in finished water. These coagulants obviously possessed positive coagulation abilities.There are about nine treatments with one control been used for the study. From the observed results,the blended coagulant MO: (Al 2 (SO 4 ) 3 treatments T7(25:25) and T8(50:50) dosage ratio gives betterremoval efficiencies with respect to pH, EC, TDS, hardness, DO, COD, Na and K, and appears to besuitable for treatment of wastewater, when compared with other dosages.
