Application of Polyaluminium Chloride Coagulant in Urban River Water Treatment Influenced the Microbial Community in River Sediment
1
State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, Qingdao 266237, China
2
Hangzhou Keyun Environmental Technology Co., Ltd., Hangzhou 310000, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Academic Editor: Sandi Orlić
Water 2021, 13(13), 1791; https://doi.org/10.3390/w13131791
Received: 31 May 2021 / Revised: 26 June 2021 / Accepted: 27 June 2021 / Published: 29 June 2021
(This article belongs to the Special Issue Microbial Communities in Water Environments: Dynamics and Interaction)
Polyaluminium chloride (PAC) has been widely used as a chemical coagulant in water treatment. However, little is known about the impact of PAC performance on the microbial community in sediments. In this study, the archaeal, bacterial, and fungal communities in urban river sediments with and without PAC treatment were investigated. Prokaryotic diversity decreased at the PAC addition site (A2) and increased along with the river flow (from A3 to A4), while eukaryotic diversity was the opposite. The abundance of core microbiota showed a similar trend. For example, the dominant Proteobacteria presented the highest relative abundance in A1 (26.8%) and the lowest in A2 (15.3%), followed by A3 (17.5%) and A4 (23.0%). In contrast, Rozellomycota was more dominant in A2 (56.6%) and A3 (58.1%) than in A1 (6.2%) and A4 (16.3%). Salinity, total dissolved solids, and metal contents were identified as the key physicochemical factors affecting the assembly of core microorganisms. The predicted functions of archaea and fungi were mainly divided into methane cycling and saprotrophic nutrition, respectively, while bacterial function was more diversified. The above findings are helpful to enhance our understanding of microorganism response to PAC and have significance for water treatment within the framework of microecology.
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Keywords:
polyaluminium chloride coagulant; urban river sediment; microbial community; function prediction
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MDPI and ACS Style
Liu, S.; Zhuang, X.; Wang, C. Application of Polyaluminium Chloride Coagulant in Urban River Water Treatment Influenced the Microbial Community in River Sediment. Water 2021, 13, 1791. https://doi.org/10.3390/w13131791
AMA Style
Liu S, Zhuang X, Wang C. Application of Polyaluminium Chloride Coagulant in Urban River Water Treatment Influenced the Microbial Community in River Sediment. Water. 2021; 13(13):1791. https://doi.org/10.3390/w13131791
Chicago/Turabian StyleLiu, Siyu, Xuchao Zhuang, and Chuandong Wang. 2021. "Application of Polyaluminium Chloride Coagulant in Urban River Water Treatment Influenced the Microbial Community in River Sediment" Water 13, no. 13: 1791. https://doi.org/10.3390/w13131791
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