Biological Treatment of Tannery Wastewater Using Activated Sludge Process

S. Haydar, J. A. Aziz, M. S. Ahmad

Abstract


A study was conducted to evaluate the feasibility of Activated Sludge Process (ASP) for the treatment of tannery wastewater and to develop a simple design criteria under local conditions. A bench scale model comprising of an aeration tank and final clarifier was used for this purpose. The model was operated continuously for 267 days. Settled tannery wastewater was used as influent to the aeration tank. Five days Biochemical Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) of the influent and effluent were measured to find process efficiency at various mixed liquor volatile suspended solids (MLVSS) and hydraulic detention time (θ). The results of the study demonstrated that an efficiency of above 90% and 80% for BOD5 and COD, respectively could be obtained if the ASP is operated at an MLVSS concentration of 3500 mg/L keeping an aeration time of 12 hours.

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References


V. Tare, S. Gupta and P. Bose; J. of Air and Waste Management Association, 53(2003) 976-982.

M. S. Ahmad; Biological Treatment of Tannery Wastewaters, M.Sc Thesis, Institute of Environmental Engineering and Research, UET, Lahore, 2002.

W. W. Eckenfelder; Industrial Water Pollution Control, McGraw-Hill International Edition, Singapure, 2002.

A. J. K. Jawahar, J. K. S. Ponselvan, M. Chinnadurai and G. Annadurai; Indian J. Environ. Protection, 18(1998) 672.

V. Murugesan, and R. Elangoan; Indian J. Environ. Protection, 14(1994) 511.

D. B. Emerson and N. L. Nemerow; Proceeding of the 24th Purdue Industrial Waste Conference, Purdue University, Lafayette, Indiana, (1969) 867-879.

M. Iqbal, I. Haque and J. A. S. Berns; The Leather Sector, Environmental Report, Environmental Technology Programme For Industry (ETPI), Federation of Pakistan Chambers of Commerce and Industry, Federation House, Karachi, Pakistan, 1998.

S. Haydar; Determination of Kinectic Coefficient for the Biological Treatment of Tannery Wastewater, M.Sc Thesis, Institute of Environmental Engineering and Research, University of Engineering & Technology, Lahore, 2004.

Standard Methods for the Examination of Water and Wastewater, 18th Edition, APHA, AWWA, WEF, 1998.

J. F. Wilkison, Introduction to Microbiology, Halsted Press, a Division, 2000. of John Wiley & Sons, Inc., New York, 1975.

L. D. Benefield and C. W. Randall; Biological Process Design for Wastewater Treatment, Prentice-Hall, Inc., Englewood Cliffs, N.J., 1980.

D. S. Parker and M. S. Merrill; Jour. Water Pollution Control Fed., 48(1976) 2511.

M. Bosnic, J. Buljan and R. P. Daniels; Pollutants in Tannery Wastewater, United Nations Industrial Development Organization (UNIDO), Regional Programme for Pollution Control in the Tanning Industry in South-East Asia, report US/RAS/92/120, 2000.






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