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Author:

Li, Jianwei (Li, Jianwei.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars:彭永臻) | Gao, Ruitao (Gao, Ruitao.) | Yang, Lan (Yang, Lan.) | Deng, Liyan (Deng, Liyan.) | Zhao, Qi (Zhao, Qi.) | Liu, Qiyu (Liu, Qiyu.) | Li, Xiyao (Li, Xiyao.) | Zhang, Qiong (Zhang, Qiong.) | Zhang, Liang (Zhang, Liang.)

Indexed by:

EI Scopus SCIE PubMed

Abstract:

This study proposes a novel strategy of stably enriching anammox in mainstream, based on the compet-itive difference to NO2-; between anoxic biofilms and suspended sludge. A modified anaerobic-anoxic-oxic (A(2)/O) process run for 500 days with actual municipal wastewater. Microbial analysis revealed that anoxic-carrier biofilms had a significantly higher abundance of anammox (qPCR: 0.74% & ndash; 4.34%) than sus-pended sludge (P < 0.001). Batch tests showed that anammox within anoxic-carrier biofilms contributed to significant nitrogen removal, coupled with partial-denitrification (NO3-+ NO2-). The anammox genus, Ca. Brocadia, was highly enriched when suspended sludge was accidentally lost. Further batch tests found that reducing suspended biomass helped anammox enrichment in anoxic-carrier biofilms, because the suspended sludge had strong NO2- competition (NO2--+ N-2 ) with anammox (increased nirK). Metage-nomic sequencing revealed that Ca. Brocadia dominates in the anoxic-carrier biofilms, and is the most important narG contributor to NO3-+ NO2-, which could have promoted the competition of NO2- with heterotrophic bacteria. For this A(2)/O process, the low effluent total nitrogen (8.9 mg +/- 1.0 mg N/L) was attributed to partial-denitrification coupling with anammox, demonstrating that this process is applica-ble to the general influent N-concentration range (30 mg & ndash; 50 mg NH4+-N/L) of municipal wastewater treatment plants (WWTPs). Based on the special competitive preference of anammox for NO2,- this study provides a promising and practical alternative for enriching anammox bacteria in municipal WWTPs. (C) 2021 Elsevier Ltd. All rights reserved.

Keyword:

Suspended sludge Partial denitrification Biological nitrogen removal Anoxic-carrier biofilms Municipal wastewater Anammox

Author Community:

  • [ 1 ] [Li, Jianwei]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 2 ] [Peng, Yongzhen]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 3 ] [Gao, Ruitao]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 4 ] [Yang, Lan]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 5 ] [Deng, Liyan]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 6 ] [Zhao, Qi]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 7 ] [Liu, Qiyu]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 8 ] [Li, Xiyao]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 9 ] [Zhang, Qiong]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
  • [ 10 ] [Zhang, Liang]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 彭永臻

    [Peng, Yongzhen]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China

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Source :

WATER RESEARCH

ISSN: 0043-1354

Year: 2021

Volume: 194

1 2 . 8 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:94

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 7

SCOPUS Cited Count: 141

ESI Highly Cited Papers on the List: 2 Unfold All

  • 2024-11
  • 2024-11

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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