Potential Inhibition of Filamentous Microorganisms in Sludge Bulking by Static Magnetic Field
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2018-07-09 https://doi.org/10.14419/ijet.v7i3.9.15264
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Activated sludge, Filamentous microorganisms, Magnetic field, Sludge bulking. -
Abstract
In activated sludge system, the performance of the process largely depends on the balance between filamentous and floc-forming microorganisms. When the normal balance of these biological communities is disturbed, filamentous microorganisms tend to proliferate, causing various problems to the treatment performances such as sludge bulking. Various approaches have been used to control the proliferation of filamentous microorganisms. However, the approaches led to various drawbacks that eventually worsen the performances of treatment systems. Therefore, this study is aimed to investigate the potential approach using static magnetic field in inhibiting filamentous microorganisms that presence in the sludge bulking. Magnetic field of intensity 88 mT was used. Its exposure on the filamentous microorganisms was investigated in terms of filaments' characteristics such as branching, shape and filaments' location. The analysis indicated that the magnetically exposed activated sludge showed less possibility presence of the filamentous microorganisms compared to unexposed activated sludge.
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References
[1] De los Reyes FL (2010), Foaming. In: Seviour RJ & Nielsen PH Microbial Ecology of Activated Sludge (pp. 215-258) London, UK: IWA Publishing.
[2] Ferreira V, Martins C, Pereira MO & Nicolau A (2014), Use of an aerobic selector to overcome filamentous bulking in an activated sludge wastewater treatment plant. Environmental Technology 35(12), 1525-1531.
[3] FilipiÄ J, Kraigher B, TepuÅ¡ B, Kokol V & Mandic-Mulec I (2012), Effects of low-density static magnetic fields on the growth and activities of wastewater bacteria Escherichia coli and Pseudomonas putida. Bioresource Technology 120, 225-232.
[4] Guo J, Peng Y, Wang Z, Yuan Z, Yang X & Wang S (2012), Control filamentous bulking caused by chlorine-resistant Type 021N bacteria through adding a biocide CTAB. Water Research 46, 6531-6542.
[5] Jenkins D, Richard MG & Daigger GT (2004), Manual on the cause and control of activated sludge bulking, foaming and other solids separation problems (3rd ed.) Chelsea: Lewis Publishers.
[6] Juang D–F (2005), Effects of synthetic polymer on the filamentous bacteria in activated sludge. Bioresource Technology 96, 31 – 40.
[7] Křiklavová L, Truhlář M, Škodová P, Lederer T & Jirků V (2014), Effects of a static magnetic field on phenol degradation effectiveness and Rhodococcus erythropolis growth and respiration in a fed-batch reactor. Bioresource Technology 167, 510-513.
[8] Åebkowska M, Rutkowska-Narożniak A, Pajor E & Pochanke Z (2011), Effect of a static magnetic field on formaldehyde biodegradation in wastewater by activated sludge. Bioresource Technology 102(19), 8777-8782.
[9] Lou IC & De los Reyes III FL (2008), Clarifying the roles of kinetics and diffusion in activated sludge filamentous bulking. Biotechnology and Bioengineering 101(2), 327-336.
[10] Schuler AJ & Jassby D (2007), Filament content threshold for activated sludge bulking: Artifact or reality? Water Research 41, 4349-4356.
[11] Tandoi V, Jenkins D & Wanner J (2006), Activated sludge separation problems. In: Theory, control measures, practical experience London: IWA Publishing.
[12] Wang X-H, Diao M-H, Yang Y, Shi Y-J, Gao M-M & Wang S- G (2012), Enhanced aerobic nitrifying granulation by static magnetic field. Bioresource Technology 110, 105–110.
[13] Wanner J, Kragelund C & Nielsen PH (2010), Microbiology of bulking. In: Microbial ecology of activated sludge London: IWA Publishing.
[14] Xu YB, Duan XJ, Yan JN & Sun SY (2009), Influence of magnetic field on Cr (VI) adsorption capability of given anaerobic sludge. Biodegradation 21(1), 1–10.
[15] Yin X, Qiao S & Zhou J (2015), Using electric field to enhance the activity of anammox bacteria. Applied Microbiology and Biotechnology 99, 6921-6930.
[16] Zaidi NS, Muda K, Sohaili J & Sillanpää M (2014), Optimization of activated sludge physical properties by magnetic field via response surface modeling. Applied Mechanics and Materials 567, 98-103.
[17] Zaidi NS, Muda K, Sohaili J, Toemen S & Yusof NZ (2016), Optimization of operating parameters for aggregation under magnetic field by response surface methodology. ARPN Journal of Engineering and Applied Sciences 11(4), 2419-2425.
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How to Cite
Syamimi Zaidi, N., Muda, K., Hussein, N., & Sillanpää, M. (2018). Potential Inhibition of Filamentous Microorganisms in Sludge Bulking by Static Magnetic Field. International Journal of Engineering & Technology, 7(3.9), 15-17. https://doi.org/10.14419/ijet.v7i3.9.15264Received date: 2018-07-08
Accepted date: 2018-07-08
Published date: 2018-07-09