Microbial mechanisms of biochar addition on carbon and nitrogen synergistic retention during distilled grain waste composting: Insights from metagenomic analysis.

Autor: Wang SP; School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environment Pollution Control, Henan Province's International Joint Laboratory on Key Techniques in Water Treatment, Henan Normal University, Xinxiang 453007, Henan, PR China; College of Architecture and Environment, Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorisation, Sichuan University, Chengdu 610065, Sichuan, PR China., Sun ZY; College of Architecture and Environment, Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorisation, Sichuan University, Chengdu 610065, Sichuan, PR China. Electronic address: szy@scu.edu.cn., Wang ST; Luzhou Laojiao Co., Ltd, Luzhou 646000, Sichuan, PR China., Tang YQ; College of Architecture and Environment, Sichuan Environmental Protection Key Laboratory of Organic Wastes Valorisation, Sichuan University, Chengdu 610065, Sichuan, PR China.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Nov; Vol. 411, pp. 131346. Date of Electronic Publication: 2024 Aug 23.
DOI: 10.1016/j.biortech.2024.131346
Abstrakt: To elucidate the mechanism of biochar addition on carbon and nitrogen retention during distilled grain (DGW) composting, this study investigated the losses of carbon and nitrogen and functional genes related to carbon and nitrogen metabolisms between biochar-treated and control composts. The addition of biochar significantly increased carbon and nitrogen retention by 13.5% and 33.8%, respectively. The difference in core carbon metabolism genes indicated that biochar addition inhibited CO 2 release and promoted carbon fixation during the later composting phase, leading to improved carbon retention. Nitrogen metabolism analysis indicated that biochar addition suppressed early-phase ammoniation and late-phase denitrification and promoted nitrification and ammonia assimilation during the later stages of composting, thereby preserving nitrogen. During the later composting phase, biochar addition enhanced carbon-nitrogen coupling metabolism activity, leading to the synchronous retention of carbon and nitrogen. These findings elucidate the mechanism of biochar addition on carbon and nitrogen retention during DGW composting.
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 © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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