Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA, USA.
Bioresour Technol. 2010 Apr;101(7):2180-4. doi: 10.1016/j.biortech.2009.11.030. Epub 2009 Dec 23.
A diffusion and reaction model is presented for a gas phase membrane biofilm reactor (MBfR) that overcomes many of limitations of conventional biofilters. The model considers transfer of toluene from the gas phase through the membrane and into a toluene degrading biofilm. Data from bench-scale tests of toluene removal in an MBfR were used to validate the model. Overall mass transfer coefficients were 0.64 x 10(-3), 1.1 x 10(-3), 1.86 x 10(-3) (ms(-1)) at liquid flow rates (shell-side) of 4, 7, and 9 L min(-1), respectively. Modeled mass transfer coefficients were in good agreement with experimental values. The bench-scale MBfR was capable of removing more than 98% of the influent toluene (an overall removal rate of 17 g m(-3)min(-1)) at an inlet concentration of 100 ppm(v) and a gas flow rate of 1.0 L min(-1) (gas residence time of 1.3s in the membrane lumen). Model predictions were well in agreement with experimental values.
提出了一种用于气相膜生物膜反应器（MBfR）的扩散和反应模型，该模型克服了传统生物滤池的许多局限性。该模型考虑了甲苯从气相通过膜进入甲苯降解生物膜的传递。使用 MBfR 中甲苯去除的台架测试数据验证了模型。在液体流速（壳侧）分别为 4、7 和 9 L min(-1)时，整体传质系数分别为 0.64 x 10(-3)、1.1 x 10(-3)和 1.86 x 10(-3)(ms(-1))。模型化的传质系数与实验值吻合良好。在入口浓度为 100 ppm(v)和气体流速为 1.0 L min(-1)（在膜腔中的气体停留时间为 1.3s）时，台架式 MBfR 能够去除超过 98%的入口甲苯（整体去除速率为 17 g m(-3)min(-1))。模型预测与实验值吻合良好。
