Lin Yen-Hui, Lee Kwang K
Department of Health and Safety and Environment Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan.
Water Environ Res. 2006 Jun;78(6):598-606. doi: 10.2175/106143006x103401.
A mathematical model was developed to describe phenol degradation in an anaerobic fixed-biofilm process. The model incorporates the mechanisms of diffusive mass transport and Monod kinetics. The model was solved using a combination of the orthogonal collocation method and Gear's method. A pilot-scale column reactor was used to verify the model. Batch kinetic tests were conducted independently to determine the biokinetic parameters used in the model, while shear loss and initial thickness of biofilm were assumed so that the model simulated the substrate concentration results well. The removal efficiency for phenol was approximately 98.5% at a steady-state condition. The model accurately described the effluent substrate concentrations and the sequence of biodegradation in the reactor. The model simulations are in agreement with the experimental results. The approaches presented in this paper could be used to design fullscale anaerobic fixed-biofilm reactor systems for the biodegradation of phenolic substrates.
建立了一个数学模型来描述厌氧固定生物膜工艺中苯酚的降解过程。该模型纳入了扩散传质和莫诺德动力学机制。使用正交配置法和吉尔方法相结合的方式求解该模型。采用中试规模的柱式反应器对模型进行验证。独立进行间歇动力学试验以确定模型中使用的生物动力学参数，同时假定生物膜的剪切损失和初始厚度，从而使模型能够很好地模拟底物浓度结果。在稳态条件下，苯酚的去除效率约为98.5%。该模型准确地描述了反应器中流出物的底物浓度和生物降解顺序。模型模拟结果与实验结果一致。本文提出的方法可用于设计用于酚类底物生物降解的全规模厌氧固定生物膜反应器系统。
