DOI: 10.1016/j.watres.2018.12.053
Scopus记录号: 2-s2.0-85060129369
论文题名: Importance of sludge conditioning in attenuating antibiotic resistance: Removal of antibiotic resistance genes by bioleaching and chemical conditioning with Fe[III]/CaO
作者: Zheng G. ; Lu Y. ; Wang D. ; Zhou L.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 61
结束页码: 73
语种: 英语
英文关键词: Antibiotic resistance genes
; Bioleaching
; Chemical conditioning with Fe[III]/CaO
; Removal
; Sludge conditioning
Scopus关键词: Acidification
; Antibiotics
; Bacteria
; Bioleaching
; Genes
; Removal
; Sewage sludge
; Sewage treatment plants
; Wastewater treatment
; Antibiotic resistance
; Antibiotic resistance genes
; Bacterial community
; Chemical acidification
; Chemical conditioning
; Municipal sewage sludge
; Sludge conditioning
; Wastewater treatment plants
; Chemical resistance
; aminoglycoside
; beta lactamase
; calcium oxide
; iron
; RNA 16S
; sulfonamide
; vancomycin
; acidification
; antibiotic resistance
; biomass
; chemical composition
; leaching
; pollutant removal
; sludge
; wastewater treatment plant
; antibiotic resistance
; Article
; bioleaching
; cell count
; controlled study
; flow cytometry
; microbial biomass
; microbial community
; moisture
; pH
; priority journal
; sewage
; sludge conditioning
; Bacteria (microorganisms)
英文摘要: Conditioning can drastically improve the dewaterability of sewage sludge and thus it is widely practiced in most wastewater treatment plants (WWTPs). In WWTPs, various antibiotic resistance genes (ARGs) present in sewage are concentrated in the sewage sludge, but the effect of sludge conditioning on ARGs in sewage sludge remains unclear. Here, we evaluated and compared the effectiveness of four sludge conditioning methods (namely chemical conditioning with polyacrylamide (PAM), chemical conditioning with Fe[III]/CaO, bioleaching conditioning, and chemical acidification conditioning) and an aerobic incubation control in removing 46 target ARGs and intI1 from a municipal sewage sludge. The damage of sludge microbial cells and the change in the sludge bacterial community during the various sludge conditioning treatments were also characterized. The results suggested that the chemical conditioning with PAM and aerobic incubation treatment did not remove ARGs and intI1 from the sewage sludge. The chemical acidification reduced the absolute abundances of most ARGs and intI1, but increased their relative abundances. However, the chemical conditioning with Fe[III]/CaO and bioleaching conditioning reduced both the absolute and relative abundances of most ARGs and removed a majority of extracellular ARGs in the sludge. During sludge conditioning treatments, the sludge microbial cells were severely damaged to decrease the total bacterial biomass in sludge, and accordingly the bacterial hosts carrying ARGs and intI were effectively damaged to reduce the absolute abundances of most ARGs and intI1. In addition, the sludge bacterial community in conditioned sludge determined the relative abundances of residual ARGs. Our findings suggest that sludge conditioning can be an important sludge treatment process in attenuating antibiotic resistance in sewage sludge, and bioleaching and chemical conditioning with Fe[III]/CaO can be employed as effective conditioning ways to reduce ARGs in sewage sludge, potentially limiting their release to the environment. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122015
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing, 210095, China
Recommended Citation:
Zheng G.,Lu Y.,Wang D.,et al. Importance of sludge conditioning in attenuating antibiotic resistance: Removal of antibiotic resistance genes by bioleaching and chemical conditioning with Fe[III]/CaO[J]. Water Research,2019-01-01