Comparison of Poly Aluminum Chloride and Chlorinated Cuprous for Chemical Oxygen Demand and Color Removal from Kashan Textile Industries Company Wastewater

Aims Textile wastewaters are the most important health and environmental problems inKashan. This research was aimed to compare the poly aluminum chloride and chlorinatedcuprous efficiency for removal of Chemical Oxygen Demand (COD) and color from KashanTextile Industries Company wastewater.Materials & Methods This experimental bench scale study in a batch system was conductedon 20 composed wastewater samples collected from Kashan Textile Industries Company rawwastewater. During 5 months, in the beginning of every week a day was selected randomlyand in the day a composed sample was taken and studied. PAC at the doses of 10, 20, 30, 40and 50mg.l-1 and chlorinated cuprous at the doses of 100, 200, 300, 400 and 500mg.l-1 wereapplied. The optimum pH also optimum concentration of PAC and chlorinated cuprous weredetermined using Jar test. The data was analyzed by SPSS 16 using descriptive statistics andFisher Exact test.Findings The average concentration of COD in the raw textile wastewater was2801.56±1398.29mg.l-1. The average COD concentration has been decreased to1125.47±797.55mg.l-1. There was a significant difference between the effects of these twocoagulants efficiency (p<0.05). The average COD removal efficiency for chlorinated cuprousand PAC was 58.52% and 72.56%, respectively. Also, the average color removal efficiency bychlorinated cuprous and PAC were 17.23 and 64.45%, respectively.Conclusion PAC is more efficient than chlorinated cuprous for both COD and color removalfrom KTIC wastewater.

Keywords:

Environmental Pollution , Pollution , biological Oxygen Demand Analysis , Waste Water