IJESD 2017 Vol.8(10): 715-718 ISSN: 2010-0264
doi: 10.18178/ijesd.2017.8.10.1044
doi: 10.18178/ijesd.2017.8.10.1044
Assessment of the Effect of Dielectrophoresis (DEP) on the Viability of Activated Sludge Biomass
B. Larbi, A. Ltaief, A. Hawari, F. Du, M. Baune, and J. Thöming
Abstract—Effective application of dielectrophoretic forces in
membrane bioreactor (MBR) systems has the potential to
suppress membrane fouling. Nevertheless, minimizing the
impact of the electric field on biomass suspension is essential to
maintain the efficiency of the wastewater treatment process. In
this study, interdigitated cylindrical electrodes (IDE), placed
inside the membrane module, were used to generate
dielectrophoresis (DEP) in an MBR system. The viability of the
biomass was determined at different voltages (5-150 V) after
1-hour exposure to a pulsed alternating current (AC) electric
field. The results of the behavioral response of the
microorganisms revealed that at low voltage applications, the
bacteria exhibited good performance and no major impact was
found on their viability/metabolism. Whereas at high voltage
applications (beyond 100 V), the current intensity and medium
temperature increased due to the joule heating effect and
caused a significant decline in the bacterial activity
and pollutant removal efficiency as a result of bacterial lysis.
Index Terms—Bacterial lysis, dielectrophoresis, interdigitated cylindrical electrodes, microorganisms, membrane bioreactor.
B. Larbi, A. Ltaief, and A. Hawari are with the Department of Civil and Architectural Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar (e-mail: bouthaina.larbi@qu.edu.qa, amina.ltaeif@qu.edu.qa, a.hawari@qu.edu.qa).
F. Du, M. Baune, and J. Thöming are with Center for Environmental Research and Sustainable Technology, University of Bremen, Leobener Str., D 28359 Bremen, Germany (e-mail: fei.du@uni-bremen.de, m.baune@uni-bremen.de, thoming@uni-bremen.de).
Index Terms—Bacterial lysis, dielectrophoresis, interdigitated cylindrical electrodes, microorganisms, membrane bioreactor.
B. Larbi, A. Ltaief, and A. Hawari are with the Department of Civil and Architectural Engineering, College of Engineering, Qatar University, 2713 Doha, Qatar (e-mail: bouthaina.larbi@qu.edu.qa, amina.ltaeif@qu.edu.qa, a.hawari@qu.edu.qa).
F. Du, M. Baune, and J. Thöming are with Center for Environmental Research and Sustainable Technology, University of Bremen, Leobener Str., D 28359 Bremen, Germany (e-mail: fei.du@uni-bremen.de, m.baune@uni-bremen.de, thoming@uni-bremen.de).
Cite: B. Larbi, A. Ltaief, A. Hawari, F. Du, M. Baune, and J. Thöming, "Assessment of the Effect of Dielectrophoresis (DEP) on the Viability of Activated Sludge Biomass," International Journal of Environmental Science and Development vol. 8, no. 10, pp. 715-718, 2017.
General Information
- ISSN: 2010-0264 (Print); 2972-3698 (Online)
- Abbreviated Title: Int. J. Environ. Sci. Dev.
- Frequency: Bimonthly
- DOI: 10.18178/IJESD
- Editor-in-Chief: Prof. Richard Haynes
- Managing Editor: Ms. Cherry L. Chen
- Indexing: Scopus (CiteScore 2022: 1.4), Google Scholar, CNKI, ProQuest, EBSCO, etc.
- E-mail: ijesd@ejournal.net
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