| 生物通风修复甲苯污染土壤过程中挥发和生物降解模拟研究 |
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| 引用本文： | 隋红,李鑫钢. 生物通风修复甲苯污染土壤过程中挥发和生物降解模拟研究[J]. 中国化学工程学报, 2011, 19(2): 340-348 |
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| 作者姓名： | 隋红 李鑫钢 |
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| 作者单位： | 1. National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin 300072, China;2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| 基金项目： | Supported by the National High Technology Research and Development Program(863Program)of China(2009AA063102,2007AA061202) |
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| 摘 要： | A two-dimensional numerical model is developed to simulate the flow,transport and biodegradation of toluene during bioventing (BV) processes in the unsaturated zones.The simulation for a single well BV system is used to illustrate the effect of air injection rate on remediation efficiency.The air is injected into the vadose zone to create a positive pressure.Simulation results show that air injection rate is a primary parameter governing the dispersal,redistribution and surface loss of contaminant.At injection rates of 81.504 m3·d-1 (Run 1) and 407.52 m3·d-1 (Run 2),the total removed mass of toluene is 169.14 kg and 170.59 kg respectively.Ratios of volatilization to bio-degradation in Run 1 and Run 2 are 0.57︰1 and 0.89︰1,respectively,indicating that lower air injection rate enhances the biodegradation efficiency greatly.Air injection rate should be optimized to meet oxygen demand and to minimize the operational cost.
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| 关 键 词： | bioventing biodegradation unsaturated zone toluene remediation |
| 收稿时间： | 2010-08-04 |
| 修稿时间： | 2010-8-4 |
Modeling for Volatilization and Bioremediation of Toluene-contaminated Soil by Bioventing |
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| SUI Hong,LI Xingang. Modeling for Volatilization and Bioremediation of Toluene-contaminated Soil by Bioventing[J]. Chinese Journal of Chemical Engineering, 2011, 19(2): 340-348 |
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| Authors: | SUI Hong LI Xingang |
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| Affiliation: | 1. National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin 300072, China;2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | A two-dimensional numerical model is developed to simulate the flow,transport and biodegradation of toluene during bioventing (BV) processes in the unsaturated zones.The simulation for a single well BV system is used to illustrate the effect of air injection rate on remediation efficiency.The air is injected into the vadose zone to create a positive pressure.Simulation results show that air injection rate is a primary parameter governing the dispersal,redistribution and surface loss of contaminant.At inject... |
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| Keywords: | bioventing biodegradation unsaturated zone toluene remediation |
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