School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Bioresour Technol. 2023 Oct;386:129539. doi: 10.1016/j.biortech.2023.129539. Epub 2023 Jul 23.
This study developed a Fenton-like system by adding calcium peroxide (CaO) to a composting system containing straw and sludge. The objective was to examine the influence of antibiotic resistance genes (ARGs) and the structure of the bacterial community. The findings indicated that the inclusion of CaO facilitated the reduction of ARGs. ARGs abundance in the test group (T) with CaO was 19.02% lower than that in the control check group (CK) without CaO, and the abundance of ARGs in both groups after composting was lower than the initial abundance. Additionally, the structure of bacterial community in both groups underwent significant changes. Redundancy analysis (RDA) revealed that the CaO-induced Fenton-like reaction predominantly affected temperature, pH, and the bacterial community by means of reactive oxygen species (ROS). In conclusion, the addition of CaO enhanced the removal of ARGs from sewage-sludge and improved compost quality in the composting.
本研究通过在包含秸秆和污泥的堆肥系统中添加过氧化钙（CaO）来开发类芬顿系统。目的是研究抗生素抗性基因（ARGs）和细菌群落结构的影响。研究结果表明，添加 CaO 有助于减少 ARGs。添加 CaO 的实验组（T）中 ARGs 的丰度比无 CaO 的对照组（CK）低 19.02%，且两组经堆肥处理后的 ARGs 丰度均低于初始丰度。此外，两组的细菌群落结构均发生了显著变化。冗余分析（RDA）表明，CaO 诱导的类芬顿反应主要通过活性氧物质（ROS）影响温度、pH 值和细菌群落。总之，添加 CaO 可增强污水污泥中 ARGs 的去除，并改善堆肥中的堆肥质量。
