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Author:

Wang, Luyao (Wang, Luyao.) | Zhao, Qi (Zhao, Qi.) | Zhang, Liang (Zhang, Liang.) | Wu, Di (Wu, Di.) | Zhou, Jiazhong (Zhou, Jiazhong.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars:彭永臻)

Indexed by:

EI Scopus SCIE

Abstract:

This study proposed a novel strategy that integrates S-0 particles (diameter: 2-3 mm) and granular sludge to establish S-0-driven partial denitrification coupled with anammox (S(0)PDA) process for autotrophic nitrogen removal from NH4+- and NO3--containing wastewaters. This process was evaluated using an up-flow anoxic sludge bed bioreactor, operating continuously for 240 days. The influent concentrations of NH4+ and NO3- were 29.9 +/- 2.7 and 50.2 +/- 2.7 mg-N/L, respectively. Throughout the operation, the hydraulic retention time was shortened from 4.0 h to 2.0 h, while the effluent concentrations of NH (+) and NO3- were maintained at a desirable level of 1.45-1.51 mg-N/L and 4.46-6.52 mg-N/L, respectively. Despite an autotrophic process, the nitrogen removal efficiency and rate reached up to 88.5 +/- 2.0 % and 1.75 +/- 0.07 kg-N/(m(3).d), respectively, indicating the remarkable robustness of the S(0)PDA process. Autotrophic anammox and sulfur-oxidizing bacteria (Candidatus Brocadia and Thiobacillus) were the predominant bacterial genera involved in the S(0)PDA process. Candidatus Brocadia was primarily enriched in the granular sludge, with a relative abundance of 6.70 %. Thiobacillus occupied a unique niche on the S-0 particles, with a relative abundance as high as 57.6 %, of which Thiobacillus thioparus with partial denitrification function (reducing NO3- to NO2- without further reduction to N-2) accounted for 78.0 %. These findings challenge the stereotype of low efficiency in autotrophic nitrogen removal from wastewater, shedding fresh light on the applications of autotrophic processes.

Keyword:

Granular sludge S-0 particles Anammox Autotrophic nitrogen removal S-0-driven partial denitrification

Author Community:

  • [ 1 ] [Wang, Luyao]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 2 ] [Zhao, Qi]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Liang]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 4 ] [Peng, Yongzhen]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 5 ] [Wu, Di]Qingdao SPRING Water Treatment Co Ltd, Qingdao 266510, Peoples R China
  • [ 6 ] [Zhou, Jiazhong]Qingdao SPRING Water Treatment Co Ltd, Qingdao 266510, Peoples R China
  • [ 7 ] [Peng, Yongzhen]Beijing Univ Technol, Beijing 100124, Peoples R China

Reprint Author's Address:

  • [Peng, Yongzhen]Beijing Univ Technol, Beijing 100124, Peoples R China;;

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Source :

WATER RESEARCH

ISSN: 0043-1354

Year: 2024

Volume: 255

1 2 . 8 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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