Evaluation of factors influencing soluble microbial product in submerged MBR through hybrid ASM model

doi:10.1007/s11783-009-0008-5

Front Envir Sci Eng Chin

0, Vol.

Issue () : 226-235 https://doi.org/10.1007/s11783-009-0008-5

RESEARCH ARTICLE

Evaluation of factors influencing soluble microbial product in submerged MBR through hybrid ASM model

Fangyue LI¹(

), Joachim BEHRENDT², Knut WICHMANN¹, Ralf OTTERPOHL²

1. Institute of Water Resources and Water Supply, Hamburg University of Technology, Schwarzenbergstr. 95 E, D-21073 Hamburg, Germany; 2. Department of Wastewater Management, Hamburg University of Technology, Eissendorfer Strasse 42, D-21073 Hamburg, Germany

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Abstract

In this study, a mathematical model was established to predict the formation of the soluble microbial product (SMP) in a submerged membrane bioreactor. The developed model was calibrated under the reference condition. Simulation results were in good agreement with the measured results under the reference condition. The calibrated model was then used in the scenario studies to evaluate the effect of three chosen operating parameters: hydraulic retention time (HRT), dissolved oxygen concentration, and sludge retention time (SRT). Simulation results revealed that the SMP dominated the soluble organic substances in the supernatant. The scenario studies also revealed that the HRT can be decreased to 1 h without deteriorating the effluent quality; dissolved oxygen concentration in the reactor can be kept at 2-3 mg/L to maintain the effluent quality, reduce the content of SMP, and minimize operating costs; the optimal SRT can be controlled to 10-15 d to achieve complete nitrification process, less membrane fouling potential, and acceptable organic removal efficiency.

Keywords hybrid activated sludge model (ASM) membrane bioreactor (MBR) soluble microbial product (SMP)

Corresponding Author(s): LI Fangyue,Email:Li.fangyue@tu-harburg.de

Issue Date: 05 June 2009

Cite this article:

Fangyue LI,Joachim BEHRENDT,Knut WICHMANN, et al. Evaluation of factors influencing soluble microbial product in submerged MBR through hybrid ASM model[J]. Front Envir Sci Eng Chin, 0, (): 226-235.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-009-0008-5
https://academic.hep.com.cn/fese/EN/Y0/V/I/226

Fig.1 Schematic description of the hybrid ASM1 model

Tab.1 Process kinetics and stoichiometry for carbon oxidation, nitrification, and formation and degradation of SMP

Fig.2 Schematic diagram of the MBR grey water treatment system

Fig.3 Oxygen uptake rate and cumulative amount of oxygen demand

Fig.4 Dependence of soluble supernatant COD on the major stoichiometric and kinetic parameters

Tab.2 Values of kinetic and stoichiometric parameters

Fig.5 Comparison of measured results with predicted results by the model

Fig.6 Influence of HRT on the soluble components

Fig.7 Influence of dissolved oxygen on the soluble components

Fig.8 Influence of SRT on the soluble components

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