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首页> 外文期刊>Applied Microbiology and Biotechnology >Aerobic degradation of 2,4,6-trichlorophenol by a microbial consortium – selection and characterization of microbial consortium
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Aerobic degradation of 2,4,6-trichlorophenol by a microbial consortium – selection and characterization of microbial consortium

机译：微生物财团对2,4,6-三氯苯酚的需氧降解-微生物财团的选择和表征

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摘要

A microbial consortium that efficiently degrades 2,4,6-TCP (2,4,6-trichlorophenol), as the sole source of carbon and energy under aerobic conditions was selected from municipal activated sludge. Six bacterial strains, designated S1, S2, S3, S4, S5 and S6, were isolated from the selected consortium and five were identified as Sphingomonas paucimobilis (S2, S3), Burkholderia cepacia (S4), Chryseomonas luteola (S5) and Vibrio metschnikovii (S6). After prolonged cultivation followed by successive transfers, the consortium's degradation ability was improved and reached a specific degradation rate of 34 mg 2,4,6-TCP g–1 dry weight h–1 (about 51 mg 2,4,6-TCP g–1 cell protein h–1). The soluble chemical oxygen demand, chloride and oxygen uptake balance data clearly indicate the complete dechlorination and mineralization of 2,4,6-TCP. The consortium's activity was not inhibited by 2,4,6-TCP concentrations ≤400 mg l–1. The highest specific growth rate (µ max of 0.01 h–1) was achieved at 2,4,6-TCP concentration ≤200 mg l–1, and the inhibition constant (K i) was 610 mg l–1 according to the Haldane inhibition kinetic model. An inoculum size up to 120 mg l–1 cell dry weight is desirable in order to avoid a lag phase and to allow faster degradation of 2,4,6-TCP.
机译：从市政活性污泥中选择了一种微生物财团，该财团可在有氧条件下有效降解2,4,6-TCP（2,4,6-三氯苯酚）作为唯一的碳和能量来源。从选定的财团中分离出6株细菌，分别命名为S1 ，S2 ，S3 ，S4 ，S5 和S6 。被鉴定为短小孢子菌（S2 ，S3 ），洋葱伯克霍尔德氏菌（S4 ），卢氏Chryseomonas luteola（S5 ）和梅氏弧菌（S6 ）。经过长时间的培养和连续的转移后，该财团的降解能力得到了改善，达到了34 mg 2,4,6-TCP g-1 干重h-1 （约51 mg 2,4,6-TCP g-1 细胞蛋白h-1 ）。可溶性化学需氧量，氯化物和氧气吸收平衡数据清楚地表明了2,4,6-TCP的完全脱氯和矿化。浓度≤400mg l–1 的2,4,6-TCP不会抑制该财团的活动。在2,4,6-TCP浓度≤200mg l–1 时达到最高的比生长速率（μmax 为0.01 h-1 ），其抑制常数（K根据Haldane抑制动力学模型，i 为610 mg l–1 。为了避免出现迟滞阶段并允许更快地降解2,4,6-TCP，最好接种物的大小不超过120 mg l-1 细胞干重。

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  • 来源
    《Applied Microbiology and Biotechnology》 |2002年第1期|112-117|共6页
  • 作者

    L. Kharoune; M. Kharoune; J. Lebeault;

  • 作者单位

    Ecole Polytechnique of Montreal. Environmental Engineering. Department of Civil Geological and Mining Engineering (CGM) P. O. Box 6079 Station Centre-ville Montreal (Quebec) Canada H3C 3A7;

    Ecole Polytechnique of Montreal. Environmental Engineering. Department of Civil Geological and Mining Engineering (CGM) P. O. Box 6079 Station Centre-ville Montreal (Quebec) Canada H3C 3A7;

    Université de Technologie de Compiègne Centre de recherches de Royallieu Département Génie Chimique BP 20529 60205 Compiègne France;

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