数字农科院2.0

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： Bing Bai;Lixia Wang;Fachun Guan;Houan Pi;Anxun Wang;Limei Zhai

作者机构：

关键词： Antibiotic resistant bacteria (ARB);Biotreatment;Excitation-Emission-MatrixSpectra (EEM);Livestock and poultry manure;Microbial community structure

期刊名称： Bioresource Technology

ISSN： 0960-8524

年卷期： 2025 年 431 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

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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