State Key Laboratory of Urban Water Resource and Environment (HIT), Harbin Institute of Technology, 202 Haihe Road, Nangang District, Harbin, Heilongjiang 150090, China.
Bioresour Technol. 2010 Dec;101(24):9749-57. doi: 10.1016/j.biortech.2010.07.115. Epub 2010 Aug 2.
Investigating how a bioreactor functions is a necessary precursor for successful reactor design and operation. Traditional methods used to investigate flow-field cannot meet this challenge accurately and economically. Hydrodynamics model can solve this problem, but to understand a bioreactor in sufficient depth, it is often insufficient. In this paper, a coupled hydrodynamics-reaction kinetics model was formulated from computational fluid dynamics (CFD) code to simulate a gas-liquid-solid three-phase biotreatment system for the first time. The hydrodynamics model is used to formulate prediction of the flow field and the reaction kinetics model then portrays the reaction conversion process. The coupled model is verified and used to simulate the behavior of an expanded granular sludge bed (EGSB) reactor for biohydrogen production. The flow patterns were visualized and analyzed. The coupled model also demonstrates a qualitative relationship between hydrodynamics and biohydrogen production. The advantages and limitations of applying this coupled model are discussed.
研究生物反应器的工作原理是成功进行反应器设计和操作的必要前提。传统的用于研究流场的方法无法准确且经济地满足这一挑战。流体动力学模型可以解决这个问题，但要充分了解生物反应器，通常还不够。本文首次从计算流体动力学 (CFD) 代码中构建了一个耦合流体动力学-反应动力学模型，以模拟气-液-固三相生物处理系统。该流体动力学模型用于对流场进行预测，然后反应动力学模型描述反应转化过程。对耦合模型进行了验证，并用于模拟用于生物制氢的膨胀颗粒污泥床 (EGSB) 反应器的行为。可视化并分析了流动模式。耦合模型还展示了流体动力学与生物制氢之间的定性关系。讨论了应用此耦合模型的优缺点。
