隋红b; 徐世民a; 李鑫钢a; 姜斌a; 黄国强b
a National Engineering Research Center for Distillation Technology, Tianjin 300072, China b School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
SUI Hongb; XU Shimina; LI Xinganga; JIANG Bina; HUANG Guoqiangb
a National Engineering Research Center for Distillation Technology, Tianjin 300072, China
b School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
摘要: 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.