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Effective mechanisms of water purification for nitrogen-modified attapulgite, volcanic rock, and combined exogenous microorganisms

文献类型： 外文期刊

作者： Zheng, Yao 1 ; Wang, Yuqin 2 ; Yang, Xiaoxi 1 ; Gao, Jiancao 1 ; Xu, Gangchun 1 ; Yuan, Julin 3 ;

作者机构： 1.Chinese Acad Fishery Sci CAFS, Freshwater Fisheries Res Ctr FFRC, Key Lab Integrated Rice Fish Farming Ecol, Minist Agr & Rural Affairs, Wuxi, Peoples R China

2.Nanjing Agr Univ, Wuxi Fishery Coll, Wuxi, Peoples R China

3.Zhejiang Inst Freshwater Fisheries, Minist Agr & Rural Affairs, Key Lab Hlth Freshwater Aquaculture, Key Lab Fish Hlth & Nutr Zhejiang Prov, Huzhou, Peoples R China

关键词： purification materials; exogenous microorganisms; water purification enhancement; microbial enzyme activity; metagenome

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： The study tested the water purification mechanism of the combination of microorganisms and purification materials via characteristic, enzymatic, and metagenomics methods. At 48 h, the removal rates of total nitrogen, total phosphorous, and Mn chemical oxygen demand in the combination group were 46.91, 50.93, and 65.08%, respectively. The alkaline phosphatase (AKP) activity increased during all times tested in the volcanic rock, Al@TCAP, and exogenous microorganism groups, while the organophosphorus hydrolase (OPH), dehydrogenase (DHO), and microbial nitrite reductase (NAR) activities increased at 36-48, 6-24, and 36-48 h, respectively. However, the tested activities only increased in the combination groups at 48 h. Al@TCAP exhibits a weak microbial loading capacity, and the Al@TCAP removal is primarily attributed to adsorption. The volcanic rock has a sufficient ability to load microorganisms, and the organisms primarily perform the removal for improved water quality. The predominant genera Pirellulaceae and Polynucleobacter served as the sensitive biomarkers for the treatment at 24, 36-48 h. Al@TCAP increased the expression of Planctomycetes and Actinobacteria, while volcanic rock increased and decreased the expression of Planctomycetes and Proteobacteria. The growth of Planctomycetes and the denitrification reaction were promoted by Al@TCAP and the exogenous microorganisms. The purification material addition group decreased the expression of Hyaloraphidium, Chytridiomycetes (especially Hyaloraphidium), and Monoblepharidomycetes and increased at 36-48 h, respectively. Ascomycota, Basidiomycota, and Kickxellomycota increased in group E, which enhanced the nitrogen cycle through microbial enzyme activities, and the growth of the genus Aspergillus enhanced the phosphorous purification effect.

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