Membrane and Water Treatment

  • 제6권4호
  • /
  • Pages.263-276
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  • 2015
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  • 2005-8624(pISSN)
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  • 2092-7037(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Fouling analysis and biomass distribution on a membrane bioreactor under low ratio COD/N

  • Gasmi, Aicha (European Membrane Institute, University of Montpellier) ;
  • Heran, Marc (European Membrane Institute, University of Montpellier) ;
  • Hannachi, Ahmed (Laboratory of process engineering and Industrial systems, University of Gabes) ;
  • Grasmick, Alain (European Membrane Institute, University of Montpellier)
  • 투고 : 2014.07.12
  • 심사 : 2015.03.09
  • 발행 : 2015.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper deals with the influence of chemical oxygen demand to nitrogen ratio ((COD/N) ratio) on the performance of an membrane bioreactor. We aim at establishing relations between COD/N ratio, organisms' distribution and sludge properties (specific resistance to filtration (SRF) and membrane fouling). It is also essential to define new criteria to characterize the autotrophic microorganisms, as the measurements of apparent removal rates of ammonium seem irrelevant to characterize their specific activity. Two experiments (A and B) have been carried on a 30 L lab scale membrane bioreactor with low COD/N ratio (2.3 and 1.5). The obtained results clearly indicate the role of the COD/N ratio on the biomass distribution and performance of the membrane bioreactor. New specific criteria for characterising the autotrophic microorganisms activity, is also defined as the ratio of maximum ammonium rate to the specific oxygen uptake rate in the endogenous state for autotrophic bacteria which seem to be constant whatever the operating conditions are. They are about 24.5 to 23.8 $gN-NH_4{^+}/gO_2$, for run A and B, respectively. Moreover, the filterability of the biological suspension appear significantly lower, specific resistance to filtration and membrane fouling rate are less than $10^{14}m^{-2}$ and $0.07\;10^{12}m^{-1}.d^{-1}$ respectively, than in conventional MBR confirming the adv < antage of the membrane bioreactor functioning under low COD/N ratio.

키워드

과제정보

연구 과제 주관 기관 : French National Research Agency

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피인용 문헌

  1. Membrane Bioreactor (MBR) Technology for Wastewater Treatment and Reclamation: Membrane Fouling vol.6, pp.4, 2016, https://doi.org/10.3390/membranes6020033
  2. Effect of solids retention time on membrane fouling in membrane bioreactors at a constant mixed liquor suspended solids concentration vol.8, pp.4, 2015, https://doi.org/10.12989/mwt.2017.8.4.337