مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

Textile industry is the major source of water consumption and wastewater pollution. There are various treatment techniques to remove textile wastewater pollution. Coagulation-flocculation is a widely used process to remove pollution due to suspended particles, In this research, different coagulants like Alum, Lime, FeCI3, FeS0 4 and MgClz were applied to select the suitab le ones with optimum remova l efficiency. Settling characteristics of floes formed in the coagulation process were studied in a laboratory scale settling column unit. Parameters such as color, COD, TSS, turbidity and settled sludge volume have been evaluated. The optimum coagulant dose and pH value were determined by comparing the effectiveness of these coag ulants. Results showed other coagulants excep t lime could eliminate color and COD successfully. In this case, FeS04 was chosen as an optimum coagu lant for color removal because of the lowest required coagulant dose, minimum settled sludge volume and maximum decolorization.