期刊
BIORESOURCE TECHNOLOGY
卷 231, 期 -, 页码 1-8出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.01.054
关键词
Antibiotic resistance gene; Bacterial community; Network analysis; Swine manure and wheat straw
资金
- National Nature Science Foundation of China [41671474, 41601531]
- Special Fund for Agro-scientific Research in the Public Interest [201303094]
- 948 Project of Chinese Ministry of Agriculture [2015-Z37]
This study explored the effects of different mass ratios of swine manure relative to wheat straw ( 3: 7, 5: 5, and 7: 3, i.e., control reactors C1, C2, and C3, respectively) on variations in antibiotic resistance genes (ARGs) and the microbial community during anaerobic digestion (AD). The cumulative biogas production volumes were 1711, 3857, and 3226 mL in C1, C2, and C3, respectively. After AD, the total relative abundance of ARGs decreased by 4.23 logs in C3, whereas the reductions were only 1.03 and 1.37 logs in C1 and C2, respectively. Network analysis showed that the genera Solibacillus, Enterococcus, Facklamia, Corynebacterium_ 1, and Acinetobacter were potential hosts of ermB, sul1, and dfrA7. Redundancy analysis showed that the bacterial communities and environmental factors played important roles in the variation in ARGs. Thus, reductions in ARGs should be considered before reusing animal manure treated by AD. (C) 2017 Elsevier Ltd. All rights reserved.
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