Enhanced removal of antibiotic resistance genes and mobile genetic elements during sewage sludge composting covered with a semi-permeable membrane
| Autor: | Shungui Zhou, Peng Cui, Zhihan Tan, Donghua Chen, Kailong Huang, Zhi Chen, Yudan Bai, Xi Li, Zhiwei Peng, Hanpeng Liao, Zhubiao Wu, Peijie Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences Environmental Chemistry Humans Waste Management and Disposal 0105 earth and related environmental sciences Sewage sludge 021110 strategic defence & security studies biology Sewage Chemistry Thermophile Composting fungi Drug Resistance Microbial Contamination Particulates biology.organism_classification Pollution Anti-Bacterial Agents Interspersed Repetitive Sequences Manure Genes Bacterial Initial phase Environmental chemistry Mobile genetic elements Bacteria Antibiotic resistance genes |
| Zdroj: | Journal of hazardous materials. 396 |
| ISSN: | 1873-3336 |
| Popis: | Transmission of antibiotic resistance genes (ARGs) via air media, such as particulate matter, has been intensively investigated due to human exposure through inhalation. However, whether particulate matter originating from the atmospheric environment of composting plants can impact ARG abundance during composting is unknown. Here, we investigated the effects of the atmospheric environment of composting plants on ARG abundance during sewage sludge composting using semi-permeable membrane-covered thermophilic composting (smTC) and conventional thermophilic composting (cTC). After smTC treatment, the total abundances of ARGs and mobile genetic elements (MGEs) decreased by 42.1 % and 38.1 % compared with those of the initial phase, respectively, but they increased by 4.5- and 1.6-fold after cTC, respectively. This result suggested that smTC was more efficient at decreasing ARGs and MGEs than cTC, mainly due to a significant reduction in bacterial contamination from the atmospheric environment of composting plants that accelerated the resurgence of ARGs and MGEs. Furthermore, culture experiments demonstrated that the abundance and diversity of antibiotic-resistant bacteria during the mature phase of smTC were also significantly (P 0.05) lower than those in the cTC treatment. Thus, covering composting with a semi-permeable membrane could decrease the risk of ARGs spreading. |
| Databáze: | OpenAIRE |
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