Flow, Transport and Biodegradation of Toluene During Bioventing  

作　　者：隋红 徐世民 李鑫钢 姜斌 黄国强 

机构地区：[1]National Engineering Research Center for Distillation Technology, Tianjin 300072, China School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]National Engineering Research Center for Distillation Technology, Tianjin 300072, China [3]National Engineering Research Center for Distillation Technology, Tianjin 300072, China School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, Chinaioventing is conducted on one-dimensional soil columns. A numerical model is developed for simulating the mass exchange, advective and dispersive transport and biodegradation of toluene. The model parameters are estimated independently through laboratory batch experiments, or from literature. Simulations are found to provide reasonable agreement with experimental data. Experimental results show that toluene removal due to biodegradation is more important at the later stage. The total cleanup time when NAPL (non-aqueous phase liquid) phase exists was twice more than that without NAPL. Sensitivity analysis of parameters suggests that model predictions are mainly dependent on mass transfer coefficient and microbial parameters, such as the half-saturation coefficient and maximum specific substrate utilization rate.

出　　处：《Chinese Journal of Chemical Engineering》2004年第3期439-443,共5页中国化学工程学报（英文版）

基　　金：the National Natural Science Foundation of China (No. 20276048).

摘　　要：Bioventing is conducted on one-dimensional soil columns. A numerical model is developed for simulating the mass exchange, advective and dispersive transport and biodegradation of toluene. The model parameters are estimated independently through laboratory batch experiments, or from literature. Simulations are found to provide reasonable agreement with experimental data. Experimental results show that toluene removal due to biodegradation is more important at the later stage. The total cleanup time when NAPL (non-aqueous phase liquid) phase exists was twice more than that without NAPL. Sensitivity analysis of parameters suggests that model predictions are mainly dependent on mass transfer coefficient and microbial parameters, such as the half-saturation coefficient and maximum specific substrate utilization rate.Bioventing is conducted on one-dimensional soil columns. A numerical model is developed for simulating the mass exchange, adivective and dispersive transport and biodegradation of toluene. The model parameters are estimated independently through laboratory batch experiments, or from literature. Simulations are found to provide reasonable agreement with experimental data. Experimental results show that toluene removal due to biodegradiation is more important at the later stage. The total cleanup time when NAPL (non-aqueous phase liquid) phase exists was twice more than that without NAPL. Sensitivity analysis of parameters suggests that model predictions are mainly dependent on mass transfer coefficient and microbial parameters, such as the half-saturation coefficient and maximum specific substrate utilization rate.

关 键 词：BIOVENTING TRANSPORT BIODEGRADATION soil remediation non-aqueous phase liquid 

分 类 号：O621[理学—有机化学]