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首页> 外文期刊>Applied Microbiology and Biotechnology >Developing and sustaining 3-chlorophenol-degrading populations in up-flow anaerobic column reactors under circum-denitrifying conditions
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Developing and sustaining 3-chlorophenol-degrading populations in up-flow anaerobic column reactors under circum-denitrifying conditions

机译：在环境反硝化条件下在上流厌氧塔反应器中开发和维持3-氯苯酚降解种群

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摘要

Microbial consortia capable of degrading 3-chlorophenol (3-CP) were enriched in continuous up-flow column reactors under circum-denitrifying conditions. 3-CP degradation capability was developed and sustained when 3-CP was supplied at 16–21 µM, although suppression of the 3-CP degradation capability was observed when 3-CP was supplied at 42 µM. When 3-CP was stably degraded, the ratio of nitrate consumption to 3-CP degradation approached the theoretical stoichiometric value, which was calculated by assuming a 3-CP degradation-dependent nitrate reduction. Batch-incubation experiments demonstrated that the microbial consortium that was enriched in the column reactors required either nitrate or oxygen for degrading 3-CP, while 3-CP was not degraded under sulfate-degrading conditions. Although many attempts were made to sustain the microbial 3-CP degradation capability under denitrifying conditions, mostly in batch cultures, none of them have been successful so far. Therefore, the results obtained in this study may be the first to demonstrate sustainable 3-CP degradation capability under circum-denitrifying conditions.
机译：能够降解3-氯苯酚（3-CP）的微生物菌群在连续的上流塔式反应器中在环境除氮条件下富集。当3-CP以16–21 µM提供时，3-CP的降解能力得以发展并得以维持，尽管当3-CP以42 µM提供时，3-CP的降解能力得到抑制。当3-CP稳定降解时，硝酸盐消耗量与3-CP降解的比率接近理论化学计量值，该值是通过假设3-CP降解依赖性硝酸盐还原而计算的。分批培养实验表明，富集在柱式反应器中的微生物财团需要硝酸盐或氧气才能降解3-CP，而3-CP在硫酸盐降解条件下不会降解。尽管已经进行了许多尝试以在反硝化条件下维持微生物3-CP的降解能力，但大多数尝试是在分批培养中进行，但到目前为止，这些尝试都没有成功。因此，在这项研究中获得的结果可能是第一个证明在环境除湿条件下可持续的3-CP降解能力的结果。

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  • 来源
    《Applied Microbiology and Biotechnology》 |2002年第1期|118-124|共7页
  • 作者

    H.S. Bae; T. Yamagishi; Y. Suwa;

  • 作者单位

    Institute for Environmental Management Technology National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Tsukuba Ibaraki 305-8569 Japan;

    Institute for Environmental Management Technology National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Tsukuba Ibaraki 305-8569 Japan;

    Institute for Environmental Management Technology National Institute of Advanced Industrial Science and Technology 16-1 Onogawa Tsukuba Ibaraki 305-8569 Japan;

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