生物滴滤器降解氯苯废气的动力学模型研究  

Study on the kinetic model of chlorobenzene degradation by biotrickling filter

作　　者：刘燕泽华 王丽萍[1] 申佳伟 姚贞先 伍林 LIU Yanzehua;WANG Liping;SHEN Jiawei;YAO Zhenxian;WU Lin(School of Environment and Spatial Information,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《中国矿业大学学报》2023年第1期199-208,共10页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51778612,51974314)。

摘　　要：本文以气-液相间传质与生物降解过程的有机结合为基础,建立生物滴滤器(BTF)净化有机废气的气-液-生物膜三相稳态动力学模型;模拟不同工况下BTF对氯苯废气的降解过程并加以验证.试验结果表明:前期研究获得的混合菌对氯苯的降解行为符合Michaelis-Menten方程,最大比降解速率ν_(max)=0.165 g/(g·h^(3));BTF稳定运行期不同进气质量浓度(ρ_(in))与空床停留时间(TE)下试验值与三相模型预测值吻合度较高,ρ_(in)>0.25 g/m^(3)时,二者平均偏差为4.56%;在进气负荷小于80 g/(m^(3)·h)时,该模型可较好地模拟BTF对有机废气的净化过程.运用该模型对不同工况下沿填料层高度氯苯的质量浓度进行预测,可有效指导BTF的设计和净化性能的预测.On the basis of mass transfer between gas-liquid phases and biofilm phase degradation,a three-phase steady-state kinetic model of gas-liquid-biofilm for the purification of organic waste gas in a biotrickling filter(BTF)was developed.The degradation process of chlorobenzene waste gas by BTF under different working conditions was simulated and verified.The experiment results show that the degradation behavior of the mixed bacteria on chlorobenzene is in accordance with the Michaelis-Menten equation,and the maximum specific degradation rate is 0.165 g/(g·h^(3)).During the stable operation of BTF,the experimental values under different inlet gas concentration(ρ_(in))and empty bed residence times(TE)are in good agreement with the predicted values of the model,when ρ_(in)>0.25 g/m^(3),the average deviation of 4.56%.When the inlet load range is less than 80 g/(m^(3)·h),the model could simulate the purification process of organic waste gas by BTF well.The height of chlorobenzene concentration along the packing under different working conditions is predicted well with the model,and it could effectively guide the design of BTF and predict the performance of BTF in purifying organic waste gas.

关 键 词：生物滴滤器 氯苯 三相动力学模型 低表面流速 

分 类 号：X511[环境科学与工程—环境工程]