Enhanced azo dye biodegradation at high salinity by a halophilic bacterial consortium

文献类型： 外文期刊

第一作者： Tian, Fang

作者： Tian, Fang;Guo, Guang;Ding, Keqiang;Yang, Feng;Wang, Huiya;Cao, Ying;Wang, Yongbo;Liu, Chong

作者机构：

关键词： Azo dye; Decolorization; Halophilic bacterial consortium; Microbial community; Salinity

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2021 年 326 卷

页码：

收录情况： SCI

摘要： The aim of this work was to study the bioaugmentation of hydrolysis acidification (HA) by a halophilic bacterial consortium. A bacterial consortium was enriched at 5% salinity, and it decolorized metanil yellow G (MYG) at salinities of 1%-15% and dye concentrations of 100-400 mg/L under static conditions. A HA system was constructed to assess the effectiveness of bioaugmentation by the halophilic bacterial consortium. The HA system showed obviously better performance for decolorization and CODMn removal and presented higher the 5-day biological oxygen demand (BOD5)/CODMn (B/C) ratio after bioaugmentation. MiSeq sequencing results indicated that the bacterial communities remarkably shifted and that the bacterial diversity was increased after bioaugmentation. Marinobacterium invaded the native microbe community and became the dominant bacterial genus in the bioaugmented HA, and it played a key role in azo dye decolorization. Therefore, bioaugmentation with a halophilic bacterial consortium improved the HA system for decolorization of azo compounds.

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