The New Methods for Purifying the Industrial Effluents by Submerged Biofilm Reactors

Seyed Alireza Mousavi Shirazi

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DOI: 10.4236/jep.2011.27114                

Abstract

Life on the earth is dependent on dynamic interactions between its physical, chemical and biological components. In fact, all the individual processes are responsible for regulating the environmental equilibrium which can provide biosphere for multiple forms of human life. In order to overcome on shortcomings, the use of immobilized cell bioreactor technology which provides a valuable effective for treatment of waste water is discussed. An immobilized system which in this matter is applied is about absorbed or captured microorganisms in a solid substratum to retain them in a reactor or analytical system. The multiply of these immobilized cells is done when by nutrients be supplied and then migrate to the surfaces which are referred to biofilms. The biofilms can be developed on various support systems such as polypropylene pall, rocks, sands, charcoal, ceramics, and glass beads. The controllable reaction vessels which are used for these colonized surfaces are referred to bioreactors. Bioreactors in both up flows and down flows mode which use of either batch or continuous processes principle can be operated. Synchronic with development in biotechnology, there is also an extensive development in the field of bioreactors like: pumped tower loop reactor (PTLR), liquid impelled loop reactor (LILR), multipurpose tower bioreactor (MTB), fluidized-bed and packed-bed bioreactor, that in this article are discussed them.

Keywords

Biofilm, Bioreactor, Effluent, Environment, Liquid, Waste Water

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	J. Bailey and D. Ollis, “Biochemical Engineering Fundamentals,” 2nd Edition, McGraw-Hill, New Delhi, 1986.
[2]	C. F. Alves, L. F. Melo and M. J. Vieira, “Influence of Medium Composition on the Characteristics of a Denitrifying Biofilm,” Process Biochemistry, Vol. 37, No. 8, 2002, pp. 837-845. doi:10.1016/S0032-9592(01)00282-5
[3]	W. A. J. Benthum, M. C. Loosdrecht, L. Tijhuis and J. J. Heijnen, “Solids Retention Time in Heterotrophic and Nitrifying Biofilms in a Biofilm Airlift Suspension Reactor,” Water Science and Technology, Vol. 32, No. 8, 1995, pp. 53-60. doi:10.1016/0273-1223(96)00007-8
[4]	W. A. J. Benthum, M. C. Loosdrecht and J. J. Heijnen, “Process Design for Nitrogen Removal Using Nitrifying Biofilm and Denitrifying Suspended Growth in a Biofilm Airlift Suspension Reactor,” Water Science and Technology, Vol. 36, No. 1, 1997, pp. 119-128. doi:10.1016/S0273-1223(97)00344-2
[5]	Y. Haibo and E. Rittmann, “Predicting Bed Expansion and Phase Holdups for Three-Phase Fluidized-Bed Reactors with and without Biofilm,” Water Research, Vol. 31, No. 10, 1997, pp. 2604-2616. doi:10.1016/S0043-1354(97)00102-4
[6]	M. J. Abraham and R. A. Srinivasan, “Lipid and Fatty Acid Composition of Selected Fungi Grown on Whey Medium,” Journal of Food Science, Vol. 49, No. 3, 1984, pp. 950-951. doi:10.1111/j.1365-2621.1984.tb13249.x
[7]	C. Nicolella, M. C. Loosdrecht and J. J. Heijnen, “Biofilm Reactors,” Journal of Biotechnology, Vol. 80, No. 1, 2000, pp. 1-33. doi:10.1016/S0168-1656(00)00229-7
[8]	R. Ramakrishnan, “Use of a Submerged Biofilm Reactor in the Treatment of Industrial Effluent,” Bombay University, Bombay, 1995.
[9]	G. Mijnbeak, “Operational Modes of Bioreactors,” Butterworth-Heinemann Ltd, Oxford, 1992.
[10]	V. Kapil, A. K. Dodeja and S. C. Sarma, “Manufacture of Lactose-Effect of Processing Parameters on Yield and Purity,” Journal of Food Science, Vol. 28, No. 3, 1990, pp. 167-170.
[11]	R. Salvetti, A. Azzellino, R. Canziani and L. Bonomo, “Effects of Temperature on Tertiary Nitrification in Moving-Bed Biofilm Reactors,” Water Research, Vol. 40, No. 15, 2006, pp. 2981-2993. doi:10.1016/j.watres.2006.05.013
[12]	P. Wilderer, “Technology of Membrane Biofilm Reactors Operated under Periodically Changing Process Conditions,” Water Science and Technology, Vol. 31, No. 1, 1995, pp. 173-183. doi:10.1016/0273-1223(95)00165-J
[13]	Z. Zhang, J. Zhou, J. Wang, H. Guo and J. Tong, “Integration of Nitrification and Denitrifying Dephosphatation in Airlift Loop Sequencing Batch Biofilm Reactor,” Process Biochemistry, Vol. 41, No. 3, 2006, pp. 599-608. doi:10.1016/j.procbio.2005.08.005
[14]	C. Nicolella, M. C. Loosdrecht and J. J. Heijnen, “Wastewater Treatment with Particulate Biofilm Reactor,” Biotechnology, Vol. 80, No. 1, 2000, pp. 1-33.