期刊
BIORESOURCE TECHNOLOGY
卷 283, 期 -, 页码 286-296出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.03.083
关键词
High solid anaerobic digestion; Antibiotics; Methane yield; Kinetic model; Microbial community; Dewatered sludge
资金
- National Natural Science Foundation of China (NSFC) [41807474]
- Fundamental Research Funds for the Central Public Welfare Research Institute [2018-jbkyywf-zsl]
- National Key Research and Development Plan Project [2016YFD0501407]
- Central Public-interest Scientific Institution Basal Research Fund [Y2019LM02-02]
To comprehensively understand how antibiotics affect anaerobic digestion, their stimulating effects on methane production cannot be ignored; however, few studies have evaluated these effects. This study investigated the stimulating effects of three typical antibiotics (oxytetracycline, sulfadimethoxine, and norfloxacin) on high solid anaerobic digestion. The results showed that 100 mg/L antibiotics exhibited a strong stimulating effect on CH4 yield; while other external carbon sources had no obvious effects. The stimulating effect was more obvious under low inoculation ratios, which could improve the system processing capacity of feed sludge. Lower lag phases were given by the modified Gompertz model when stimulating effects occurred. The variations of physicochemical parameters and microbial Venn maps both showed that day 5 was a critical point for digestion time. The relative abundance of Methanosarcina was enhanced when the stimulating effect occurred, whereas Methanoculleus decreased. Different microbial characteristics were obtained for different samples from the heat maps.
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