Identification of factors affecting removal of antibiotic resistance genes in full-scale anaerobic digesters treating organic solid wastes
- Authors
- Damtie, Mekdimu Mezemir; Lee, Jangwoo; Shin, Jingyeong; Shin, Seung Gu; Son, Heejong; Wang, Jinhua; Kim, Young Mo
- Issue Date
- May-2022
- Publisher
- Elsevier Ltd
- Keywords
- Antibiotic resistance genes; Full-scale anaerobic digestion; Environmental factor; Organic solid waste; Correlation
- Citation
- Bioresource Technology, v.351, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Bioresource Technology
- Volume
- 351
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/138690
- DOI
- 10.1016/j.biortech.2022.126929
- ISSN
- 0960-8524
- Abstract
- 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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