生物炭
厌氧消化
肥料
废水
消化(炼金术)
厚壁菌
生物
化学
制浆造纸工业
食品科学
农学
细菌
甲烷
环境科学
环境工程
生态学
有机化学
工程类
遗传学
色谱法
16S核糖体RNA
热解
作者
Wei Sun,Jie Gu,Xiaojuan Wang,Xiaoqing Qian,Xiaxia Tuo
标识
DOI:10.1016/j.biortech.2018.02.052
摘要
Biochar has positive effects on nitrogen conservation during anaerobic digestion, but its impacts on antibiotic resistance genes (ARGs) are unclear. Therefore, the effect of biochar (0, 5, 20, and 50 g/L) on the environmental risk of ARGs during cattle manure wastewater anaerobic digestion were investigated. The results showed that 5 g/L biochar reduced the relative abundances (RAs) of 5/13 ARGs while 20 g/L biochar significantly reduced the total RAs of ARGs in the digestion products, where the RA of ISCR1 was 0.89 log lower than the control. Biochar mainly affected the distribution of ARGs by influencing the RAs of Firmicutes and Proteobacteria, and the influence of 20 g/L biochar was greater than that of 5 g/L. Mobile genetic elements also influenced the ARG profiles, especially intI2 and ISCR1. The addition of 20 g/L biochar to cattle farm wastewater anaerobic digestion systems could reduce the environmental risk of ARGs.
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