A study on cometabolic bioventing for the in situ remediation
of trichloroethylene |
| |
Authors: | Hong Sui Xingang Li Guoqiang Huang Bin Jiang |
| |
Institution: | (1) National Engineering Research Center for Distillation Technology, Tianjin University, 300072 Tianjin, China;(2) School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, China |
| |
Abstract: | Cometabolic bioventing for removal of TCE in the unsaturated zone was studied in a soil column study using methane as growth substrate. A numerical model was developed for simulating the behavior of TCE during cometabolic bioventing. The model parameters were estimated independently through laboratory batch experiments or from the literature. Simulations were found to provide reasonable agreement with the experimental data. The experimental data show that a total TCE remediation efficiency of over 95% was obtained. The volatilization-to-biodegradation ratio of TCE was about 7:1 and T
c
values ranging from 0.0078 to 0.07 were obtained in this methane-driven system. Due to the toxicity of the high TCE concentrations to the microbial biomass in the initial stages of the experiment, cometabolic biodegradation was enhanced and was more efficient in the later stages of cometabolic bioventing. |
| |
Keywords: | biodegradation cometabolic bioventing growth substrate soil trichloroethylene (TCE) vadose zone |
本文献已被 PubMed SpringerLink 等数据库收录! |