Effect of salinity on removal performance in hydrolysis acidification reactors treating textile wastewater

文献类型： 外文期刊

第一作者： Guo, Guang

作者： Guo, Guang;Tian, Fang;Ding, Keqiang;Yang, Feng;Hu, Zhixin;Zhang, Liping;Liu, Chong;Sun, Yanmei;Wang, Shiwei

作者机构：

关键词： Metanil Yellow; Azo dye; Decolorization; Microbial community; Soluble microbial products; 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： 2020 年 313 卷

页码：

收录情况： SCI

摘要： Hydrolysis acidification (HA) is a classical method for synthetic textile wastewater treatment. However, the salinity effect on the functional mechanism of the microorganisms carrying out HA has rarely been researched. In the present study, the salinity effect on the dye removal efficiency was investigated, and the soluble microbial products (SMP), extracellular polymeric substances (EPS), and microbial community were analyzed at different salinities. The dye and COD removal rates in the HA reactor decreased with increasing salinity. Volatile fatty acids (VFAs) accumulated. The remarkable increases in SMP and EPS were found at high salinity, mainly because more polysaccharides were synthesized than protein. In addition, sequencing analysis showed that high salinity altered the microbial community structure, and Lactococcus, Raoultella and Enterococcus were the decolorizing bacteria at high salinity. This work will improve the understanding of the influence of salinity on the removal efficiency and microbial community during HA.

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