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Author:

Li, Ding-Chang (Li, Ding-Chang.) | Gao, Jing-Feng (Gao, Jing-Feng.) (Scholars:高景峰) | Zhang, Shu-Jun (Zhang, Shu-Jun.) | Gao, Yong-Qing (Gao, Yong-Qing.) | Sun, Li-Xin (Sun, Li-Xin.)

Indexed by:

EI Scopus SCIE PubMed

Abstract:

y The prevalence and accumulation of antibiotic resistance genes (ARGs) were frequently detected in biological wastewater treatment processes, which might cause potential health crisis to human. In present study, the fates of ARGs during two different aerobic granular sludge (AGS) cultivation processes were investigated. The results showed that traditional AGS (T-AGS) cultivation process and enhanced AGS (E-AGS) cultivation process had significant differences (P < 0.005) in ARGs shift patterns. E-AGS process had higher average relative abundance (0.280 +/- 0.079) of ARGs than T-AGS process (0.130 +/- 0.041), while the intensity of ARGs enrichment during E-AGS (1.52-5.29 fold) was lower than T-AGS (3.79-75.31 fold) process. TnpA and intI1 as two different types of mobile genetic elements (MGEs) carrying ARGs, were observed to contribute significantly to the horizontal gene transfer (HGT) during T-AGS (r = 0.902, P < 0.050) and E-AGS (r = 0.823, P < 0.001) processes, respectively. Higher HGT level took place and more possible potential hosts (25 hosts) harboring ARGs were detected during E-AGS process comparing with T-AGS process (17 hosts). Meanwhile, over large AGS might increase the propagation of several antibiotic deactivation ARGs, so it was not advised. Overall, whether during T-AGS or during E-AGS process which was applied in a pilot-scale sequencing batch reactor treating municipal wastewater, the accumulation and spread of ARGs were inevitable. It should be valued that some suitable pretreatments of seed sludge should be executed, meanwhile, advanced treatment for removing of ARGs in AGS should be conducted to maintain the relative abundances of ARGs at relatively low level.

Keyword:

Antibiotic resistance genes Aerobic granular sludge Co-occurrence patterns Spread patterns Mobile genetic elements

Author Community:

  • [ 1 ] [Li, Ding-Chang]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 2 ] [Gao, Jing-Feng]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Shu-Jun]Res & Dev Ctr Beijing Drainage Grp Co Ltd, Beijing 100124, Peoples R China
  • [ 4 ] [Gao, Yong-Qing]Res & Dev Ctr Beijing Drainage Grp Co Ltd, Beijing 100124, Peoples R China
  • [ 5 ] [Sun, Li-Xin]Res & Dev Ctr Beijing Drainage Grp Co Ltd, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 高景峰

    [Gao, Jing-Feng]Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China

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Source :

ENVIRONMENT INTERNATIONAL

ISSN: 0160-4120

Year: 2020

Volume: 137

1 1 . 8 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:138

Cited Count:

WoS CC Cited Count: 43

SCOPUS Cited Count: 45

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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