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首页> 外文期刊>Separation and Purification Technology >Modeling of liquid pollutant biodegradation process in a fluidized bed reactor with biofllm
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Modeling of liquid pollutant biodegradation process in a fluidized bed reactor with biofllm

机译：带有生物膜的流化床反应器中液体污染物生物降解过程的建模

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In this study a model is developed which describes the mass transfer process inside a fluidized bed reactor,considering the effects of dispersion,convection and reaction in the liquid phase,as well as diffusion and reaction within the biofilm.Applying the method of volume averaging for the different scales of heterogeneity,it is possible to obtain the one-equation model to describe the concentration in the reactor,when the local mass equilibrium condition is valid.The complete modeling of the mass transfer process inside the reactor is presented.The hypothesis assumed,the constraints to be satisfied,as well as the boundary conditions for the various scales involved,are discussed.The modeling is applied to the denitrification process in the fluidized bed bioreactor.Three cases are evaluated in which the constraint conditions are totally or partially satisfied.The results are compared with the experimental results given in the literature.On analyzing the results,it can be concluded that the model developed allows the prediction,with good precision,of the concentration profile inside the fluidized bed bioreactor,showing a good agreement with the experimental data.Thus,it is possible to determine the constraint conditions in order to guarantee the validity of the one-equation model,and to use the model developed to predict the performance of the bioreactor for different operating conditions.
机译：在这项研究中，建立了一个描述流化床反应器内传质过程的模型，其中考虑了液相中的分散，对流和反应以及生物膜中的扩散和反应的影响。在不均匀程度不同的情况下，当局部质量平衡条件有效时，有可能获得描述反应堆浓度的一方程模型。给出了反应堆内部传质过程的完整模型。将该模型应用于流化床生物反应器的反硝化过程。评估了三种情况，其中全部或部分满足约束条件将该结果与文献中给出的实验结果进行比较。通过对结果进行分析，可以得出结论：开发的模型可以对流化床生物反应器内的浓度分布进行高精度的预测，与实验数据吻合良好。因此，有可能确定约束条件以保证单相反应器的有效性。方程模型，并使用开发的模型来预测生物反应器在不同操作条件下的性能。

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