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Risk level and removal performance of antibiotic resistance genes and bacterial pathogens in static composting with different temperatures
Bioresource Technology ( IF 9.7 ) Pub Date : 2024-09-02 , DOI: 10.1016/j.biortech.2024.131420
Yan Yang 1 , Jiani Wang 1 , Jie Yin 1 , Zhongliang Cui 1 , Guoxue Li 1 , Guoliang Liu 1 , Jinhui Jiang 1 , Jing Yuan 1
Affiliation  

The effect of different levels of temperature on resistance genes is not clear in mesophilic static composting (<50 °C). This study conducted livestock manure composting with different temperature gradients from 20 to 50 °C, it was found that the reduction rates of risk rank-I antibiotic resistance genes (from 3 % to 66 %), metal resistance genes (from −50 % to 76 %) and bacterial pathogens (from 72 % to 91 %) all increased significantly with increasing temperature from 20 to 50°C. The vulnerability of bacterial communities increased significantly, and the assembly process of bacterial communities changed from deterministic to stochastic with the increase of composting temperature. Higher temperature could accelerate the removal of thermolabile resistance genes hosts or pathogenic hosts carrying mobile genetic elements by directly or indirectly affecting organic acids content. Therefore, for soil safety, the temperature of the manure recycling process should be increased as much as possible.

中文翻译:


不同温度静态堆肥中抗生素抗性基因和细菌病原体的风险水平及去除性能



在中温静态堆肥(<50℃)中,不同温度水平对抗性基因的影响尚不清楚。本研究以20℃至50℃不同温度梯度进行畜禽粪便堆肥,发现风险等级I抗生素抗性基因(从3%到66%)、金属抗性基因(从-50%到-50%)的降低率随着温度从 20°C 升高到 50°C,细菌病原体(从 72% 增加到 91%)均显着增加。随着堆肥温度的升高,细菌群落的脆弱性显着增加,细菌群落的组装过程由确定性转变为随机性。较高的温度可以通过直接或间接影响有机酸含量来加速耐热抗性基因宿主或携带可移动遗传元件的致病宿主的去除。因此,为了土壤安全,应尽可能提高粪便回收过程的温度。
更新日期:2024-09-02
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