Assessment of Kinetic Coefficients for Chrome Tannery Wastewater Treatment by Activated Sludge System

Authors

Department of Leather Engineering, Khulna University of Engineering & Technology, Khulna-9203, Bangladesh

Abstract

Activated sludge process is feasible and extensively method used for biological treatment of sewage and industrial wastewaters. The system is usually designed based on the simplified hydraulic related parameters. But design of biological treatment system based on hydraulic considerations is not reasonable to ensure efficient treatment due to the extensive variation in the composition of wastewater and also for complex nature of biochemical reactions occurring in the treatment processes. Hence kinetic approach can be an option for appropriate design of biological treatment systems rather than hydraulic parameters considerations. The present study is aimed to develop kinetic coefficients for the treatment of chrome-tannery wastewater using activated sludge process. A laboratory-scale treatment unit subsuming an aeration tank and a clarifier were used for this system. The treatment unit was operated continuously for 80 days by varying the hydraulic retention time from 3 to 12 days. BOD for both influent and effluent as well as mixed liquor volatile suspended solid (MLVSS) of aeration tank were determined at different retention time to yield data for kinetic coefficients. The substrate utilization rate coefficient (k) was 0.624 day−1 while the half velocity constant (KS) was 38.42 mg/L, yield coefficient (Y) was found to be 0.674 mgMLVSS/mgBOD and the endogenous decay coefficient (Kd) was found as 0.068 day-1. These coefficients can be utilized for the rational design of activated sludge system for the treatment of chrome tannery wastewater.

Keywords


1.     Juel, M.A.I., Z.U.M. Chowdhury, T. Ahmed, M. Ali, M.A.S. Akanda and A.M. Morshed. Heavy metal speciation and toxicity characteristics of tannery sludge. in AIP Conference Proceedings. 2016. AIP Publishing.

2.     Paul, H., A.P.M. Antunes, A.D. Covington, P. Evans and P.S. Phillips, 2013. Bangladeshi leather industry: an overview of recent sustainable developments. Journal of the Society of Leather Technologists and Chemists, 97(1): 25-32.

3.     Karim, M.R., S. Manshoven, M.R. Islam, J.A. Gascon, M. Ibarra, L. Diels and M.M. Rahman, 2012. Assessment of an urban contaminated site from tannery industries in Dhaka city, Bangladesh. Journal of Hazardous, Toxic, and Radioactive Waste, 17(1): 52-61.

4.     Chowdhury, M., M. Mostafa, T.K. Biswas and A.K. Saha, 2013. Treatment of leather industrial effluents by filtration and coagulation processes. Water Resources and Industry, 3: 11-22.

5.     Ram, B., P.K. Bajpai and H.K. Parwana, 1999. Kinetics of chrome-tannery effluent treatment by the activated-sludge system. Process biochemistry, 35(3): 255-265.

6.     Goswami, S. and D. Mazumder, 2015. Kinetic Behaviour of the Activated Sludge Process Used for Treating Composite Chrome Tannery Wastewater. Polish Journal of Environmental Studies, 24(6): 2405-2409.

7.     Haydar, S., J. Aziz and M. Ahmad, 2016. Biological treatment of tannery wastewater using activated sludge process. Pakistan Journal of Engineering and Applied Sciences.

8.     Lateef, A., M.N. Chaudhry and S. Ilyas, 2013. Biological treatment of dairy wastewater using activated sludge. Science Asia, 39(2): 179-185.

9.     Eddy, M.a., Wastewater Engineering1995, New Delhi: Tata McGraw-Hill Publishing.

10.   Shah, M., H.N. Hashmi and H. Waheed, 2012. Determination of kinetic coefficients for the biological treatment of textile wastewater. International Journal of Physical Sciences, 7(10): 1726-1740.

11.   Eckenfelder, W. and D. Ford, 1970. Experimental Procedures for Process Design. Water Pollution Control." Jenkins Pub. Co.

1.     Juel, M.A.I., Z.U.M. Chowdhury, T. Ahmed, M. Ali, M.A.S. Akanda and A.M. Morshed. Heavy metal speciation and toxicity characteristics of tannery sludge. in AIP Conference Proceedings. 2016. AIP Publishing.

2.     Paul, H., A.P.M. Antunes, A.D. Covington, P. Evans and P.S. Phillips, 2013. Bangladeshi leather industry: an overview of recent sustainable developments. Journal of the Society of Leather Technologists and Chemists, 97(1): 25-32.

3.     Karim, M.R., S. Manshoven, M.R. Islam, J.A. Gascon, M. Ibarra, L. Diels and M.M. Rahman, 2012. Assessment of an urban contaminated site from tannery industries in Dhaka city, Bangladesh. Journal of Hazardous, Toxic, and Radioactive Waste, 17(1): 52-61.

4.     Chowdhury, M., M. Mostafa, T.K. Biswas and A.K. Saha, 2013. Treatment of leather industrial effluents by filtration and coagulation processes. Water Resources and Industry, 3: 11-22.

5.     Ram, B., P.K. Bajpai and H.K. Parwana, 1999. Kinetics of chrome-tannery effluent treatment by the activated-sludge system. Process biochemistry, 35(3): 255-265.

6.     Goswami, S. and D. Mazumder, 2015. Kinetic Behaviour of the Activated Sludge Process Used for Treating Composite Chrome Tannery Wastewater. Polish Journal of Environmental Studies, 24(6): 2405-2409.

7.     Haydar, S., J. Aziz and M. Ahmad, 2016. Biological treatment of tannery wastewater using activated sludge process. Pakistan Journal of Engineering and Applied Sciences.

8.     Lateef, A., M.N. Chaudhry and S. Ilyas, 2013. Biological treatment of dairy wastewater using activated sludge. Science Asia, 39(2): 179-185.

9.     Eddy, M.a., Wastewater Engineering1995, New Delhi: Tata McGraw-Hill Publishing.

10.   Shah, M., H.N. Hashmi and H. Waheed, 2012. Determination of kinetic coefficients for the biological treatment of textile wastewater. International Journal of Physical Sciences, 7(10): 1726-1740.

11.   Eckenfelder, W. and D. Ford, 1970. Experimental Procedures for Process Design. Water Pollution Control." Jenkins Pub. Co.