Treatability studies of textile wastewater

Abstract Coagulation‐Sedimentation of wastewater from a textile mill using different coagulants was carried out. The use of lime‐ferrous sulphate reduced the organic load considerably. As an alternative, biological treatment of industrial wastewater combined with equal proportions of domestic sewage using a complete mixing activated sludge process produced a very high quality effluent. A final process design was developed. Economic evaluation of the methods adopted indicated that the costs of chemical treatment are far less than the costs of biological treatment.