| 白假丝酵母PDY-07厌氧生物降解4-氯酚的研究 |
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| 引用本文： | 闻建平,李红梅,白静,姜岩. 白假丝酵母PDY-07厌氧生物降解4-氯酚的研究[J]. 中国化学工程学报, 2006, 14(6) |
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| 作者姓名： | 闻建平 李红梅 白静 姜岩 |
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| 作者单位： | Department of Biochemical Engineering School of Chemical Engineering and Technology，Tianjin University，Department of Biochemical Engineering，School of Chemical Engineering and Technology，Tianjin University，Department of Biochemical Engineering，School of Chemical Engineering and Technology，Tianjin University，Department of Biochemical Engineering，School of Chemical Engineering and Technology，Tianjin University，Tianjin 300072，China，Tianjin 300072，China，Yancheng Textile Vocational and Technical College，Yancheng 224005，China，Tianjin 300072，China，Tianjin 300072，China，School of Life Sciences and Chemisty，Harbin College，Harbin 150016，China |
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| 基金项目： | 国家自然科学基金，天津市自然科学基金 |
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| 摘 要： | 1 INTRODUCTION Chlorinated organic compounds are one of the most important groups of xenobiotic chemicals enter- ing the environment. They are extensively used as herbicides, insecticides, fungicides, heat transfer me- dia, insulators, and lubricants[1,2]. Chlorophenols (CPs) have been extensively used to preserve wood and in pesticides, pesticides, herbicides, biocides and dyes[3]. CPs are persistent in the environment, are toxic, and cause increased risk to health[4―6]; therefore, the…
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Biodegradation of 4-Chlorophenol by Candida albicans PDY-07 under Anaerobic Conditions |
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| WEN Jianping,LI Hongmei,BAI Jing,JIANG Yan. Biodegradation of 4-Chlorophenol by Candida albicans PDY-07 under Anaerobic Conditions[J]. Chinese Journal of Chemical Engineering, 2006, 14(6) |
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| Authors: | WEN Jianping LI Hongmei BAI Jing JIANG Yan |
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| Abstract: | Candida albicans PDY-07 was isolated from activated sludge under anaerobic conditions and identified as a member belonging to the genus Candida. Pure culture of C. albicans PDY-07, biodegradation of 4-chlorophenol (4-CP) was carried out under anaerobic conditions in Erlenmeyer flasks at 35 ℃, with an initial pH of 7.0-7.2 and a starting inoculum of 10% (by volume). The results showed that, under the above-mentioned conditions, C. albicans PDY-07 could thoroughly biodegrade 4-CP up to a concentration of 300 mg·L-1 within 244h and that it had a high tolerance potential of up to 440 mg·L-1 for 4-CP. With the increase in the initial concentrations of 4-CP, substrate inhibition was obviously enhanced. There was increased consumption of 4-CP, which was not assimilated by the cell for growth but was used to counteract the strong substrate inhibition. In addition, the cell growth and substrate-degradation kinetics of 4-CP as the sole source of carbon and energy for the strain in batch cultures were also investigated over a wide range of substrate concentrations (2.2-350 mg·L-1), using the proposed cell growth and degradation kinetic models. The results recorded from these experiments showed that the proposed kinetic models adequately described the dynamic behavior of 4-CP biodegradation by C. albicans PDY-07. |
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| Keywords: | Candida albicans 4-chlorophenol biodegradation anaerobic substrate inhibition |
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