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Author:

Fan, Xiao-Yan (Fan, Xiao-Yan.) (Scholars:樊晓燕) | Zhang, Zhong-Xing (Zhang, Zhong-Xing.) | Li, Xing (Li, Xing.) | Liu, Yuan-Kun (Liu, Yuan-Kun.) | Cao, Shen-Bin (Cao, Shen-Bin.) | Geng, Wen-Nian (Geng, Wen-Nian.) | Wang, Ya-Bao (Wang, Ya-Bao.) | Zhang, Xiao-Han (Zhang, Xiao-Han.)

Indexed by:

EI Scopus SCIE

Abstract:

The construction of aerobic denitrification (AD) systems in an antibiotic-stressed environment is a serious challenge. This study investigated strategy of cyclic stress with concentration gradient (5-30 mg/L) of sulfamethoxazole (SMX) in a sequencing batch reactor (SBR), to achieve operation of AD. Total nitrogen removal efficiency of system increased from about 10 % to 95 %. Original response of abundant-rare genera to antibiotics was changed by SMX stress, particularly conditionally rare or abundant taxa (CRAT). AD process depends on synergistic effect of heterotrophic nitrifying aerobic denitrification bacteria (Paracoccus, Thauera, Hypomicrobium, etc). AmoABC, napA, and nirK were functionally co-expressed with multiple antibiotic resistance genes (ARGs) (acrR, ereAB, and mdtO), facilitating AD process. ARGs and TCA cycling synergistically enhance the antioxidant and electron transport capacities of AD process. Antibiotic efflux pump mechanism played an important role in operation of AD. The study provides strong support for regulating activated sludge to achieve in situ AD function.

Keyword:

Cyclic stress Sulfamethoxazole Aerobic denitrification Microecology Antibiotic resistance genes

Author Community:

  • [ 1 ] [Fan, Xiao-Yan]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Zhong-Xing]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Li, Xing]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Yuan-Kun]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Cao, Shen-Bin]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Geng, Wen-Nian]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Wang, Ya-Bao]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 8 ] [Zhang, Xiao-Han]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China
  • [ 9 ] [Zhang, Zhong-Xing]Chinese Acad Environm Planning, Ctr Situat Anal & Planning & Assessment, Beijing 100041, Peoples R China

Reprint Author's Address:

  • [Fan, Xiao-Yan]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China;;

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Source :

BIORESOURCE TECHNOLOGY

ISSN: 0960-8524

Year: 2024

Volume: 402

1 1 . 4 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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