Determination and discussion hydraulic retention time in membrane bioreactor system |
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Authors: | Zhang Shao-yuan van Houten Renze Eikelboom Dick H Jiang Zhao-chun Fan Yao-bo Wang Ju-si |
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Institution: | 1. Research Center for Eco-Environmental Science, Chinese Academy of Sciences (CAS), Beijing 100085, China; Environmental Biotechnology Department, TNO Institute of Environmental Sciences, Energy Research and Process Innovation, 7300 AH Apeldoorn, The Nether 2. Environmental Biotechnology Department, TNO Institute of Environmental Sciences, Energy Research and Process Innovation, 7300 AH Apeldoorn, The Netherlands 3. Research Center for Eco-Environmental Science, Chinese Academy of Sciences (CAS), Beijing 100085, China |
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Abstract: | Based on the microorganism kinetic model, the formula for computing hydraulic retention time in a membrane bioreactor system (MBR) is derived. With considering HRT as an evaluation index a combinational approach was used to discuss factors which have an effect on MBR. As a result, the influencing factors were listed in order from strength to weakness as: maximum specific removal rate K, saturation constant Ks, maintenance coefficient m, maximum specific growth rate mu m and observed yield coefficient Yobs. Moreover, the formula was simplified, whose parameters were experimentally determined in petrochemical wastewater treatment. The simplified formula is theta = 1.1(1/beta-1) (Ks + S)/KX0, for petrochemical wastewater treatment K and Ks equaled 0.185 and 154.2, respectively. |
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Keywords: | membrane bioreactor wastewater treatment hydraulic retention time microbial kinetic model kinetic constant operation constant |
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