Optimization of Whey Treatment in Rotating Biological Contactor: Application of Taguchi Method

Document Type: Original Article

Authors

1 Department of Civil-Environmental Engineering, Mazandaran Institute of Technology, Babol, Iran

2 Biotechnology Research Lab, Department of Chemical Engineering, Babol Noshirvani University of Technology, Iran

3 Department of Civil Engineering, Shomal University of Amol, Iran

4 Department of Civil and Environmental Engineering, University of Louisville, Louisville, KY, USA

Abstract

Industrial waste management is the main concern of sustainable environment, and the proper control and operation of wastewater treatment plants for efficient removal of pollutants are certainly important. In this study, the L16 orthogonal array of the Taguchi method was applied to determine the optimum condition of some controlling parameters such as organic loading rate, hydraulic retention time, number of stages, rotational speed and recycling for treating whey effluent in a rotating biological contactor (RBC). In order to determine the impacts of levels and factors, the optimum condition of the experiment was predicted and determined. QUALITEK-4 has reported 76.25% COD removal based on a desired experimental condition (COD: 50000 mg L−1, HRT: 24 h, No. of stages: 3). To improve the performance of the RBC, second optimum condition (COD: 50000 mg L−1, HRT: 24 h, recycling: positive, rotational speed: 10 rpm, No. of stages: 3) was also investigated. According to the above-stated conditions, the highest COD removal was found to be 98%. Furthermore, two sets of test experiments were also conducted in lab scale under optimum conditions, and the prediction of other combinations of factors/levels was evaluated. Overall, the experimental results demonstrated that Taguchi method was able to predict COD removal with an average relative error of 6.5%.

Keywords


  1. Janczukowicz, W., M. Zieliński and M. Dębowski, 2008. Biodegradability evaluation of dairy effluents originated in selected sections of dairy production. Bioresource Technology, 99(10): 4199-4205.
  2. Ebrahimi, A., M. Asadi and G. Najafpour, 2009. Dairy wastewater treatment using three-stage rotating biological contactor (NRBC). International Journal of Engineering, 22(2): 107-114.
  3. Bylund, G. and T. Pak, Dairy processing handbook2003: Tetra Pak Processing Systems AB Lund.
  4. Ebrahimi, A., G.D. Najafpour, M. Mohammadi and B. Hashemiyeh, 2010. Biological treatment of whey in an UASFF bioreactor followed a three-stage RBC. Chemical Industry and Chemical Engineering Quarterly, 16(2): 175182.
  5. Yorgun, M., I.A. Balcioglu and O. Saygin, 2008. Performance comparison of ultrafiltration, nanofiltration and reverse osmosis on whey treatment. Desalination, 229(1): 204-216.
  6. Farizoglu, B., B. Keskinler, E. Yildiz and A. Nuhoglu, 2007. Simultaneous removal of C, N, P from cheese whey by jet loop membrane bioreactor (JLMBR). Journal of hazardous materials, 146(1): 399-407.
  7. Fang, H.H., 1991. Treatment of wastewater from a whey processing plant using activated sludge and anaerobic processes. Journal of dairy science, 74(6): 2015-2019.
  8. Najafpour, G., A. Zinatizadeh and L. Lee, 2006. Performance of a three-stage aerobic RBC reactor in food canning wastewater treatment. Biochemical engineering journal, 30(3): 297-302.
  9. Çinar, Ö., H. Hasar and C. Kinaci, 2006. Modeling of submerged membrane bioreactor treating cheese whey wastewater by artificial neural network. Journal of biotechnology, 123(2): 204-209.
  10. Mba, D. and R. Bannister, 2007. Ensuring effluent standards by improving the design of Rotating Biological Contactors. Desalination, 208(1): 204-215.
  11. Kubsad, V., S. Chaudhari and S. Gupta, 2004. Model for oxygen transfer in rotating biological contactor. Water research, 38(20): 4297-4304.
  12. Najafpour, D.G., P.N. Naidu and A.H. Kamaruddin, 2008. Rotating biological contactor for biological treatment of poultry processing plant wastewater using Saccharomyces cerevisiae. ASEAN Journal of Chemical Engineering, 2(1): 1-6.
  13. Najafpour, G., H.A. Yieng, H. Younesi and A. Zinatizadeh, 2005. Effect of organic loading on performance of rotating biological contactors using palm oil mill effluents. Process biochemistry, 40(8): 2879-2884.
  14. Castillo, E., M. Vergara and Y. Moreno, 2007. Landfill leachate treatment using a rotating biological contactor and an upward-flow anaerobic sludge bed reactor. Waste Management, 27(5): 720-726.
  15. Sirianuntapiboon, S. and C. Chuamkaew, 2007. Packed cage rotating biological contactor system for treatment of cyanide wastewater. Bioresource technology, 98(2): 266-272.
  16. Erzurumlu, T. and B. Ozcelik, 2006. Minimization of warpage and sink index in injection-molded thermoplastic parts using Taguchi optimization method. Materials & design, 27(10): 853-861.
  17. Wang, T.-Y. and C.-Y. Huang, 2007. Improving forecasting performance by employing the Taguchi method. European journal of operational research, 176(2): 1052-1065.
  18. Ho, W.-H., J.-T. Tsai, B.-T. Lin and J.-H. Chou, 2009. Adaptive network-based fuzzy inference system for prediction of surface roughness in end milling process using hybrid Taguchi-genetic learning algorithm. Expert Systems with Applications, 36(2): 3216-3222.
  19. Taguchi, G. and D. Clausing, 1990. Robust quality. Harvard Business Review, 68(1): 65-75.
  20. Singaravelu, J., D. Jeyakumar and B. Nageswara Rao, 2009. Taguchi's approach for reliability and safety assessments in the stage separation process of a multistage launch vehicle. Reliability Engineering & System Safety, 94(10): 15261541.
  21. Oztop, M.H., S. Sahin and G. Sumnu, 2007. Optimization of microwave frying of potato slices by using Taguchi technique. Journal of Food Engineering, 79(1): 83-91.
  22. Burton, M., A. Subic, M. Mazur and M. Leary, 2010. Systematic design customization of sport wheelchairs using the Taguchi method. Procedia Engineering, 2(2): 26592665.
  23. Al-Darrab, I.A., Z.A. Khan, M.A. Zytoon and S.I. Ishrat, 2009. Application of the Taguchi method for optimization of parameters to maximize text message entering performance of mobile phone users. International Journal of Quality & Reliability Management, 26(5): 469-479.
  24. Aber, S., D. Salari and M. Parsa, 2010. Employing the Taguchi method to obtain the optimum conditions of coagulation–flocculation process in tannery wastewater treatment. Chemical Engineering Journal, 162(1): 127-134.
  25. Zolfaghari, G., A. Esmaili-Sari, M. Anbia, H. Younesi, S. Amirmahmoodi and A. Ghafari-Nazari, 2011. Taguchi optimization approach for Pb (II) and Hg (II) removal from aqueous solutions using modified mesoporous carbon. Journal of hazardous materials, 192(3): 1046-1055.
  26. Türkmen, İ., R. Gül and C. Çelik, 2008. A Taguchi approach for investigation of some physical properties of concrete produced from mineral admixtures. Building and environment, 43(6): 1127-1137.
  27. Rosa, J.L., A. Robin, M. Silva, C.A. Baldan and M.P. Peres, 2009. Electrodeposition of copper on titanium wires: Taguchi experimental design approach. Journal of Materials Processing Technology, 209(3): 1181-1188.
  28. Zeng, M., L. Tang, M. Lin and Q. Wang, 2010. Optimizationof heat exchangers with vortex-generator fin by Taguchi method. Applied Thermal Engineering, 30(13): 1775-1783.
  29. Dingal, S., T. Pradhan, J.S. Sundar, A.R. Choudhury and S. Roy, 2008. The application of Taguchi’s method in the experimental investigation of the laser sintering process. The International Journal of Advanced Manufacturing Technology, 38(9-10): 904-914.
  30. Lakshminarayanan, A. and V. Balasubramanian, 2008. Process parameters optimization for friction stir welding of RDE-40 aluminium alloy using Taguchi technique. Transactions of Nonferrous Metals Society of China, 18(3): 548-554.
  31. Zhang, J.Z., J.C. Chen and E.D. Kirby, 2007. Surface roughness optimization in an end-milling operation using the Taguchi design method. Journal of materials processing technology, 184(1): 233-239.
  32. Palanikumar, K., 2008. Application of Taguchi and response surface methodologies for surface roughness in machining glass fiber reinforced plastics by PCD tooling. The International Journal of Advanced Manufacturing Technology, 36(1-2): 19-27.
  33. Hasçalık, A. and U. Çaydaş, 2008. Optimization of turning parameters for surface roughness and tool life based on the Taguchi method. The International Journal of Advanced Manufacturing Technology, 38(9-10): 896-903.
  34. Lin, C.L., S.H. Chang, W.J. Chang and Y.C. Kuo, 2007. Factorial analysis of variables influencing mechanical characteristics of a single tooth implant placed in the maxilla using finite element analysis and the statistics‐ based Taguchi method. European journal of oral sciences, 115(5): 408-416.
  35. Apha, A., 1999. WEF, 2005. Standard methods for the examination of water and wastewater, 21: 258-259.
  36. Naik, S.S. and Y.P. Setty, 2011. OPTIMIZATION OF PARAMETERS FOR DENITRIFICATION OF WASTEWATER USING FLUIDIZED BED BIOREACTOR BY TAGUCHI METHOD. International Journal of Biotechnology Applications, 3(3).
  37. Madaeni, S. and S. Koocheki, 2006. Application of taguchi method in the optimization of wastewater treatment using spiral-wound reverse osmosis element. Chemical Engineering Journal, 119(1): 37-44.
  38. Ayoub, G. and P. Saikaly, 2004. The combined effect of step-feed and recycling on RBC performance. Water research, 38(13): 3009-3016.
  39. Costley, S. and F. Wallis, 1999. Effect of disk rotational speed on heavy metal accumulation by rotating biological contactor (RBC) biofilms. Letters in applied microbiology, 29(6): 401-405