膜生物反应器ASM-CFD耦合仿真研究进展

Research advances on membrane bioreactor simulation using ASM-CFD coupled approach

膜生物反应器(membrane bioreactor,MBR)出水水质和运行能耗受生化反应和水力条件的共同影响,开展基于生化反应动力学与水力输运过程相互作用下的数字化MBR仿真模拟,对MBR节能减耗、结构优化及创新具有重要意义.文章介绍在MBR生物-水力场仿真模拟中常用的生化反应动力学模型,活性污泥模型(activated sludge model,ASM)及计算流体力学(computational fluid dynamics,CFD)模型,综述ASM-CFD耦合模型对MBR生物-水力场仿真研究的最新进展.综述结果表明,ASM-CFD可以较好地模拟短污泥龄(sludge residence time,SRT)MBR生物-水力场,能提供准确、丰富的流场和污水组分浓度分布信息.

Membrane bioreactor（MBR）effluent quality and operation energy consumption are affected by hydraulic condition combined with biochemical reactions.Studying the biochemical reaction process while taking the hydraulic effect into account is of great significance in operating a MBR steadily and energyefficientcy.Activated sludge model（ASM）and computational fluid dynamics（CFD）modeling applied in MBR process were reviewed in terms of biological-hydraulic field simulation.The reviewed results showed that ASM-CFD integrated modeling was capable to simulate the MBR biological-hydraulic fieldwith short sludge residence time（SRT）,and gave accurate and abundant information of flow field and sewage species concentration distribution.ASM-CFD integrated modeling was thus believed to be a powerful tool for MBR research,design and application.However,there were few publications on MBR modeling based on ASM-CFD,so further detailed research needs to be developed.