The sequential dewatering and drying treatment enhanced the potential favorable effect of microbial communities in drinking water treatment residue for environmental recycling.

Autor: Wang C; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China. Electronic address: chwang@niglas.ac.cn., Wei Z; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China; Graduate University of Chinese Academy of Sciences, China., Liu R; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China., Bai L; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China., Jiang H; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China., Yuan N; CQC New Energy Technology School, Nanjing Vocational College of Information Technology, Nanjing, China. Electronic address: yuannn@njcit.cn.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2021 Jan; Vol. 262, pp. 127930. Date of Electronic Publication: 2020 Aug 09.
DOI: 10.1016/j.chemosphere.2020.127930
Abstrakt: The beneficial recycling of drinking water treatment residue (DWTR) for environmental remediation has received increasingly interests; whereas, the reported potential effect of microbial communities in different DWTR was ambiguous, which was unfavorable for the beneficial recycling. This study hypothesized that the varied treatment to DWTR in different waterworks induced the ambiguous effect; accordingly, responses of microbial communities in DWTR to the sequential dewatering and drying treatment were determined based on samples from three waterworks, in combination with 180-d incubation tests. The results showed that the microbial communities varied remarkably in different DWTR before being dewatered (DWTS). However, after dewatering, the increased microbial diversities were observed, and the microbial communities exhibited higher similarities among the dewatered DWTR from different waterworks; furthermore, the dewatered DWTR with subsequent drying treatment enriched more bacteria genus with potential environmental functions after incubation tests. The variations of microbial communities were closely related to DWTR properties, such as pH, organic matter, metals, P, and water extractable nutrients. Further analysis indicated that with maintaining high adsorption capability of DWTR, the dewatering treatment tended to retain specific microbial communities that may be induced by the applied similar techniques in different waterworks; the accumulated nutriments due to drying treatment and the stable DWTR pH enhanced the potential functional bacteria enrichment. Overall, the dewatering and drying treatment led to microbial communities with generality in different DWTR and increased the potential favorable microbial effect, promoting DWTR recycling in environmental remediation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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