Maturity phase is crucial for removing antibiotic resistance genes during composting: novel insights into dissolved organic matter-microbial symbiosis system
文献类型： 外文期刊
作者： Bai, Bing 1 ; Wang, Lixia 1 ; Guan, Fachun 3 ; Pi, Houan 4 ; Wang, Anxun 4 ; Zhai, Limei 5 ;
作者机构： 1.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Changchun 130102, Peoples R China
2.Univ Chinese Acad Sci, Beijing 101408, Peoples R China
3.Jilin Acad Agr Sci, Changchun 130033, Peoples R China
4.Jilin Univ, Changchun 130015, Peoples R China
5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China
关键词： Livestock and poultry manure; Biotreatment; Excitation-Emission-MatrixSpectra (EEM); Microbial community structure; Antibiotic resistant bacteria (ARB)
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.0； 五年影响因子：9.5 ）
ISSN： 0960-8524
年卷期： 2025 年 431 卷
页码：
收录情况： SCI
摘要： Composting is widely regarded as an effective method for reducing antibiotic resistance genes (ARGs) in livestock and poultry manure. However, the critical mechanisms of ARGs in different composting phase are still unclear. In this study, normal composting and two types of rapid composting (without mature phase) were used to analyze the removal of ARGs and the succession of dissolved organic matter (DOM). Compared to normal composting, rapid composting reactivated tetracyclines, sulfonamide, and quinolones resistance genes during the maturation phase and reduced the total ARGs removal rates by 45.58 %-57.87 %. Humus-like components could inhibit the proliferation of ARGs, and the enrichment of protein-like components increased abundances of Pusillimonas, Persicitalea, and Pseudomonas, indirectly reducing the removal. This study is the first to demonstrate the contribution of DOM and microbial community to ARGs removal, emphasizing the importance of the maturation phase for ARGs elimination. This research provides guidance for producing safe compost products.
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