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| Experiments and modelling of phenanthrene biodegradation in the aqueous phase by a mixed culture | |
| 作者姓名： | LIU Xiang MAO Xiao-min YANG Jian-gang D.A. Barry LI Ling |
| 作者单位： | [1]Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China [2]Contaminated Land Assessment and Remediation Research Centre, Institute for Infrastructure and Environment, School of Engineering and Electronics, The University of Edinburgh, Edinburgh EH9 3JL, United Kingdom [3]Chinese Academy of Transportation Sciences, Ministry of Communications, Beijing 100029, China [4]Environmental Engineering Division, School of Engineering, the University of Queensland, St. Lucia QLD 4072 Australia [5]Centre for Eco-Environmental Modelling, Hohai University, Nanjing 210098. China |
| 基金项目： | 中国科学院资助项目;国家科技攻关项目 |
| 摘 要： | Pollution by polycyclic aromatic hydrocarbons（PAHs） is widespread due to tmsuitable disposal of industrial waste. They are mostly defined as priority pollutants by environmental protection authorities worldwide. Phenanthrene, a typical PAH, was selected as the target in this paper. The PAH-degrading mixed culture, named ZM, was collected from a petroleum contaminated river bed. This culture was injected into phenanthrene solutions at different concentrations to quantify the biodegradation process. Results show near-complete removal of phenanthrene in three days of biodegradation if the initial phenanthrene concentration is low. When the initial concentration is high, the removal rate is increased but 20%-40% of the phenanthrene remains at the end of the experiment. The biomass shows a peak on the third day due to the combined effects of microbial growth and decay. Another peak is evident for cases with a high initial concentration, possibly due to production of an intermediate metabolite. The pH generally decreased during biodegradation because of the production of organic acid. Two phenomenological models were designed to simulate the phenanthrene biodegradation and biomass growth. A relatively simple model that does not consider the intermediate metabolite and its inhibition of phenanthrene biodegradation cannot fit the observed data. A modified Monod model that considered an intermediate metabolite （organic acid） and its inhibiting reversal effect reasonably depicts the experimental results. |
| 关 键 词： | 多轮芳烃 生物降解模型 环境污染 环境分析 |
| 文章编号： | 1001-0742（2006）01-0147-07 |
| 收稿时间： | 2005-04-06 |
| 修稿时间： | 2005-05-13 |
Experiments and modelling of phenanthrene biodegradation in the aqueous phase by a mixed culture |
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| LIU Xiang,MAO Xiao-min,YANG Jian-gang,D.A. Barry,LI Ling.Experiments and modelling of phenanthrene biodegradation in the aqueous phase by a mixed culture[J].Journal of Environmental Sciences,2006,18(1):147-153. | |
| Authors: | LIU Xiang MAO Xiao-min YANG Jian-gang DA Barry and LI Ling |
| Institution: | 1. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China 2. Contaminated Land Assessment and Remediation Research Centre, Institute for Infrastructure and Environment, School of Engineering and Electronics, The University of Edinburgh, Edinburgh EH9 3JL, United Kingdom 3. Chinese Academy of Transportation Sciences, Ministry of Communications, Beijing 100029, China 4. Environmental Engineering Division, School of Engineering, the University of Queensland, St. Lucia QLD 4072 Australia;Centre for Eeo-Environmental Modelling, Hohai University, Nanjing 210098. China |
| Abstract: | Pollution by polycyclic aromatic hydrocarbons(PAHs) is widespread due to unsuitable disposal of industrial waste. They are mostly defined as priority pollutants by environmental protection authorities worldwide. Phenanthrene, a typical PAH, was selected a |
| Keywords: | biodegradation model phenanthrene microbial growth and decay Monod growth model |
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