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首页> 外文期刊>Journal of Hazardous Materials >Microbial community structures in mixed bacterial consortia for azo dye treatment under aerobic and anaerobic conditions
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Microbial community structures in mixed bacterial consortia for azo dye treatment under aerobic and anaerobic conditions

机译：需氧和厌氧条件下混合细菌群落中偶氮染料的微生物群落结构

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摘要

Thirteen pure strains that possessed high methyl red (MR)-decolorizing ability were isolated from dye-contaminated water. Each isolate was identified by 16S rDNA sequencing. The results reveal that all of the isolated strains were facultative anaerobic bacteria. Two novel bacterial consortia (AE and AN), which could decolorize MR under aerobic and anaerobic conditions, respectively, were developed. Azo dye decolorization rate was significantly higher with the use of consortia compared to that with the use of individual strains. Both of the consortia can decolorize different azo dyes effectively in a short time, and tolerate MR with high concentrations. To provide further insight into the microbial diversity of the bacteria consortia under aerobic and anaerobic conditions, polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analyses were performed. PCR-DGGE profiles revealed that the microbial community had changed significantly with varying initial concentrations of MR. Phylogenetic analysis indicated that microbial populations in the aerobic compartment belong to Klebsiella. Buttiauxella and Bacillus, whereas Klebsiella, Escherichia, Bacillus and Clostridium were present in the anaerobic compartment. Klebsiella, which was the majority genus in both of the consortia, may play an important role in azo dye removal.
机译：从污染了染料的水中分离出13个具有高甲基红（MR）脱色能力的纯菌株。通过16S rDNA测序鉴定每个分离物。结果表明，所有分离的菌株均为兼性厌氧菌。开发了两个新的细菌菌群（AE和AN），它们分别在有氧和厌氧条件下可以使MR脱色。与使用单个菌株相比，使用财团的偶氮染料脱色率显着更高。这两个财团都可以在短时间内有效地使不同的偶氮染料脱色，并能耐受高浓度的MR。为进一步了解有氧和厌氧条件下细菌群落的微生物多样性，进行了聚合酶链反应-变性梯度凝胶电泳（PCR-DGGE）分析。 PCR-DGGE图谱显示，随着MR初始浓度的变化，微生物群落发生了显着变化。系统发育分析表明，有氧菌室内的微生物种群属于克雷伯菌。丁酸杆菌和芽孢杆菌，而克雷伯菌，大肠埃希菌，芽孢杆菌和梭菌存在于厌氧区室。克雷伯氏菌是两个财团中的大多数，可能在偶氮染料的去除中起重要作用。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.185-192|共8页
  • 作者

    Daizong Cui; Guofang Li; Dan Zhao; Xiaoxu Gu; Chunlei Wang; Min Zhao;

  • 作者单位

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

    Life Science College, Northeast Forestry University, Harbin, 150040, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    azo dye; decolorization; bacterial consortium; identification; microbial community;

    机译：偶氮染料脱色细菌财团鉴定微生物群落;

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