College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, China; Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, Hunan 410128, China.
College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, China; Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, Hunan 410128, China; College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
Sci Total Environ. 2022 Nov 1;845:157384. doi: 10.1016/j.scitotenv.2022.157384. Epub 2022 Jul 14.
As a common biological engineering technology, anaerobic digestion can stabilize sewage sludge and convert the carbon compounds into renewable energy (i.e., methane). However, anaerobic digestion of sewage sludge is severely affected by antibiotics. This review summarizes the effects of different antibiotics on anaerobic digestion of sewage sludge, including production of methane and volatile fatty acids (VFAs), and discusses the impact of antibiotics on biotransformation processes (solubilization, hydrolysis, acidification, acetogenesis and methanogenesis). Moreover, the effects of different antibiotics on microbial community structure (bacteria and archaea) were determined. Most of the research results showed that antibiotics at environmentally relevant concentrations can reduce biogas production mainly by inhibiting methanogenic processes, that is, methanogenic archaea activity, while a few antibiotics can improve biogas production. Moreover, the combination of multiple environmental concentrations of antibiotics inhibited the efficiency of methane production from sludge anaerobic digestion. In addition, some lab-scale pretreatment methods (e.g., ozone, ultrasonic combined ozone, zero-valent iron, Fe and magnetite) can promote the performance of anaerobic digestion of sewage sludge inhibited by antibiotics.
作为一种常见的生物工程技术，厌氧消化可以稳定污水污泥，并将碳化合物转化为可再生能源（即甲烷）。然而，污水污泥的厌氧消化受到抗生素的严重影响。本综述总结了不同抗生素对污水污泥厌氧消化的影响，包括甲烷和挥发性脂肪酸（VFAs）的产生，并讨论了抗生素对生物转化过程（溶解、水解、酸化、产乙酸和产甲烷）的影响。此外，还确定了不同抗生素对微生物群落结构（细菌和古菌）的影响。大多数研究结果表明，在环境相关浓度下的抗生素可以通过抑制产甲烷过程，即产甲烷古菌的活性，从而主要降低沼气产量，而少数抗生素可以提高沼气产量。此外，多种环境浓度抗生素的组合抑制了污泥厌氧消化中甲烷生成的效率。此外，一些实验室规模的预处理方法（例如臭氧、超声联合臭氧、零价铁、Fe 和磁铁矿）可以促进受抗生素抑制的污水污泥厌氧消化的性能。
