Treatability Studies on Tannery Wastewater
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 7
Abstract
Tanning industry is one of the oldest industries releasing wastewater which is characterized by high BOD, COD, suspended solids, chloride and chromium. Coagulation process helps to reduce the suspended and colloidal materials responsible for turbidity of the wastewater. In the present study, an attempt has been made to evaluate the effectiveness of chemical coagulants such as Alum, Ferric Chloride, Ferrous Sulphate and Ferric Alum in the treatment of tannery wastewater. The treatment was carried on a magnetic stirrer. The optimum dosage and optimum pH of each of the coagulant were determined. The optimum dosages of Alum, FeCl3, FeSO4 and Ferric Alum were 1600mg, 1500mg, 2000mg and 2000mg per 650mL respectively and the optimum pH were 8,9,10.5 and 9.5 respectively. In case of Alum at an optimum dosage and optimum pH, the maximum reduction in COD, TSS, TDS, Total Chromium and BOD were found to be 41%, 51.7%, 26.8%, 69.4% and 55.7% respectively. In case of FeCl3, the maximum reduction was found to be 64%, 58%, 28.7%, 73% and 63.6% respectively. In case of FeSO4 and Ferric Alum the maximum reduction was found to be 71.7%, 62.5%, 32%, 76.8%, 66% and 74%, 62.2%, 35%, 77.3% and 71.5% respectively.
Authors and Affiliations
Bushra Butool, B. G. Mahendra, N. Raveendhar
Keywords
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