Identification of factors affecting removal of antibiotic resistance genes in full-scale anaerobic digesters treating organic solid wastes
- Damtie, Mekdimu Mezemir; Lee, Jangwoo; Shin, Jingyeong; Shin, Seung Gu; Son, Heejong; Wang, Jinhua; Kim, Young Mo
- Issue Date
- ELSEVIER SCI LTD
- Antibiotic resistance genes; Full-scale anaerobic digestion; Environmental factor; Organic solid waste; Correlation
- BIORESOURCE TECHNOLOGY, v.351
- Journal Title
- BIORESOURCE TECHNOLOGY
- Efficiencies of removing antibiotic resistance genes (ARGs) and intI1 were explored using eight full-scale anaerobic digesters. The digesters demonstrated different characteristics on the basis of substrate types (food waste, manure or sludge); configuration (single or two-stage); temperature (psychrophilic, mesophilic or thermophilic); hydraulic retention time (HRT) (9.7-44 days); and operation mode (continuous stirred tank reactor or plug flow reactor). Digesters' configuration or operating parameters showed a greater effect on abundance of ARGs than the type of input substrate. Redundancy analysis (RDA) accounted for 85.2% of the total variances and digesters with the same configuration and operational conditions showed similar performance for removal of ARGs. The highest efficiencies of removing ARGs (99.99%) were observed in two-stage thermophilic digesters with relatively long HRTs (32 days). The lowest removal efficiency (97.93%) was observed in single-stage mesophilic with relatively short HRTs (9.7 days), likely due to vertical and horizontal gene transfer.
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- 융합기술공과대학 > Department of Energy Engineering > Journal Articles
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