...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Microbiology and Biotechnology >Degradation of 2,4,6-trichlorophenol (2,4,6-TCP) by co-immobilization of anaerobic and aerobic microbial communities in an upflow reactor under air-limited conditions
【24h】

Degradation of 2,4,6-trichlorophenol (2,4,6-TCP) by co-immobilization of anaerobic and aerobic microbial communities in an upflow reactor under air-limited conditions

机译：在空气受限的条件下，通过将厌氧和好氧微生物群落共同固定在上流反应器中，降解2,4,6-三氯苯酚（2,4,6-TCP）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The co-immobilization and the culture of anaerobic and aerobic communities was tested for the mineralization of 2,4,6-trichlorophenol (2,4,6-TCP). At first, the anaerobic microorganisms (aggregated into granules) were cultivated in an upflow anaerobic sludge blanket (UASB) reactor, in a continuous mode, with glucose, propionate, acetate (COD loading rate = 0.5–2.0 g COD/l per day, ratio 1:1:1) and 2,4,6-TCP (2,4,6-TCP loading rate = 25–278 µmol/l per day) as substrates. 2,4,6-TCP was degraded into 2,4-DCP and 4-CP, but it was not mineralized because of the low degradation rates of 4-CP. Furthermore, the highest loading rates of 2,4,6-TCP (>126 µmol/l per day) caused the inhibition of the strains degrading the propionate. The granules were therefore tested in association with the aerobic community. They were immobilized in κ-carrageenan/gelatin [2% (w/w) of each polymer] gel beads and cultivated in a reactor, on their own (to test the influence of the gel), and then with the aerobic community, under anaerobic and air-limited conditions, respectively. The results showed that (1) the gel did not influence the activity of the granules, (2) the anaerobic and aerobic communities could be easily co-immobilized in gel beads and cultivated in a reactor, (3) the mineralization of 2,4,6-TCP (2,4,6-TCP loading rate = 10–506 µmol/l per day), its intermediates of degradation and the other substrates [glucose + acetate + propionate (ratio 1:1:1) = COD loading rate = 500 mg COD/l per day] could be obtained under air-limited conditions if the culture parameters were strictly controlled [airflow = 36–48 vvd (volume of air/volume of liquid in the reactor per day), pH value at around 7.5]. Finally, the gel did not retain its structure during the whole culture (263 days) in the air-limited reactor, but the anaerobic and aerobic communities retained their activities and worked together for the mineralization.
机译：厌氧和好氧社区的共同固定化和文化进行了测试的2,4,6-三氯苯酚（2,4,6-TCP）的矿化。首先，将厌氧微生物（聚集成颗粒）在连续的厌氧污泥覆盖（UASB）反应器中以葡萄糖，丙酸酯和乙酸盐（每天的COD加载量= 0.5–2.0 g COD / l，比率1：1：1）和2,4,6-TCP（2,4,6-TCP加载速率= 25–278 µmol / l /天）作为底物。 2,4,6-TCP被降解为2,4-DCP和4-CP，但由于4-CP的降解率低而未被矿化。此外，最高的2,4,6-TCP加载速率（每天> 126 µmol / l）导致抑制了降解丙酸酯的菌株。因此，结合有氧社区对颗粒进行了测试。将它们固定在κ-角叉菜胶/明胶[每种聚合物的2％（w / w）]凝胶珠中，并在反应器中单独培养（以测试凝胶的影响），然后在有氧群落下进行培养。无氧和空气受限的条件。结果表明：（1）凝胶不影响颗粒的活性；（2）厌氧和需氧菌很容易固定在凝胶珠中，并在反应器中培养；（3）2,4的矿化作用，6-TCP（2,4,6-TCP负载量= 10-506 µmol / l /天），其降解的中间体和其他底物[葡萄糖+乙酸盐+丙酸酯（比例1：1：1）= COD负载如果严格控制培养参数[气流= 36–48 vvd（每天的空气量/反应器中的液体量），pH值为约7.5]。最终，凝胶在限流反应器的整个培养过程中（263天）没有保留其结构，但厌氧和有氧群落保持了活性并共同为矿化作用。

著录项

  • 来源
    《Applied Microbiology and Biotechnology》 |2001年第4期|524-530|共7页
  • 作者

    H. Gardin; J. Lebeault; A. Pauss;

  • 作者单位

    Département de Génie Chimique Université de Technologie de Compiègne BP 20-529 60205 Compiègne cedex France;

    Département de Génie Chimique Université de Technologie de Compiègne BP 20-529 60205 Compiègne cedex France;

    Département de Génie Chimique Université de Technologie de Compiègne BP 20-529 60205 Compiègne cedex France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号