Degradation of brilliant crocein using the halotolerant bacterial consortium DAS

文献类型： 外文期刊

第一作者： Wang, Ruoju

作者： Wang, Ruoju;Li, Xianguo;Chen, Zhixiang;Zhang, Dahai;Yang, Qianqian;Zhang, Xuzhi;Shi, Yaqi

作者机构：

关键词： Azo dye; Degradation; Halotolerant bacteria; Kinetic analysis; Biological method

期刊名称：BIOCHEMICAL ENGINEERING JOURNAL （ 影响因子：3.9； 五年影响因子：4.0 ）

ISSN： 1369-703X

年卷期： 2024 年 206 卷

页码：

收录情况： SCI

摘要： Technologies for removing azo dyes from textile wastewater have attracted increasing attention. In this study, a biological method was developed using the halotolerant bacterial consortium DAS, which was isolated from an activated sludge sample. Under optimal conditions (i.e., 40degree celsius, pH 6.0, 15% salinity and 400 mg center dot L- 1 peptone), the degradation rate of Brilliant Crocein (BC) (500 mg center dot L- 1 initial concentration) was 70.67 mg center dot L-1 center dot h-1, with a removal percentage of 97.43 +/- 0.15% after an incubation period of 3 days. Growth-based characterizations showed that the addition of peptone as a cosubstrate facilitated degradation by enhancing metabolic activity and increasing the total bacterial biomass. 16 S rRNA-based gene analysis showed that the addition of peptone did not increase the abundance of degrading functional bacteria in the halotolerant bacterial community DAS. The degradation could be carried out in mediums with high salinity (up to 25%), enabling direct treatment of textile wastewater without the need for the dilution step. This biological method is promising for constructing an efficient and environmentally friendly technology for textile wastewater treatment.

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