Iman Keshavarz - Ph.D Student , Department of chemical engineer, University of Kashan
Mohsen Ashjari - Ph.D , Department of chemical engineer, University of Kashan
Mina Kamyab Teymouri - Msc Student ,Department of chemistry, Science and Research Branch, Islamic Azad university, Tehran, Iran

Industrial wastewater is caused by water consumption in industrial activities or from industrial sources and during various stages of production, and sometimes constitute the most dangerous type of wastewater. Almost no water-based industry can survive without water, and water consumed together with overhead wastes generates wastewater and should be treated appropriately and then repelled. The bulk of industrial wastewater also has contaminants that are characterized by organic matter (soluble or insoluble), the most important indicator of contamination. In terms of COD, the degree and severity of industrial wastewater pollution can be estimated from the parameters of the above. In this research, we tried to reduce the amount of anaerobic microorganisms by using coagulants and using them much more than usual, as well as the amount of turbidity. In this method, we tried to improve the purity with the lowest Costs are spent. The COD value and the turbidity of this raw effluent were in 20000 mg/l and 350 NTU, which, after refining with coagulants, was 10600 mg/l and 33.2 NTU, in the best condition, converted with Poly-Aluminum Chloride coagulant and use of anaerobic microorganisms and coagulants amounts to 5000 mg/l and 17.7 NTU in the best coagulant condition became. The use of microorganisms in the coagulation method was very useful and could eliminate 75% COD contamination and 95% turbidity.

Anaerobic microorganisms, Industrial wastewater treatment, Coagulation