Home Journals Articles Updates About
CN
image
收藏切换
Highly efficient nitrogen and phosphorus removal by a novel denitrifying phosphorus removal system operated in an anaerobic-anoxic-aerobic-anoxic mode
收藏切换
PDF
Dong LI1, *, Sai-yue QI1, Si-bo FU1, Yan-jun ZHU1, Qin-yuan WANG1, Jie ZHANG1, 2
China Environmental Science | 2025, 45(6) : 3001 - 3009
Less
收藏切换
China Environmental Science | 2025, 45(6): 3001-3009
• Water Pollution Control •
Highly efficient nitrogen and phosphorus removal by a novel denitrifying phosphorus removal system operated in an anaerobic-anoxic-aerobic-anoxic mode
Full
Dong LI1, *, Sai-yue QI1, Si-bo FU1, Yan-jun ZHU1, Qin-yuan WANG1, Jie ZHANG1, 2
Affiliations
  • 1.Beijing Key Laboratory of Water Quality Science and Water Environment Restoration Project, Beijing University of Technology, Beijing 100124, China
  • 2.State Key Laboratory of Urban Water Resources and Water Environment, Harbin University of Technology, Harbin 150090, China
Published: 2025-06-20
Outline
收藏切换

Cooperative strategies that mitigate competition among dominant functional microorganisms are crucial for efficient nitrogen and phosphorus removal in wastewater treatment. This study investigated a novel single-stage sequencing batch reactor operating under an anaerobic/anaerobic/oxic/anaerobic (A/A1/O/A2) mode for 100days to regulate the dynamic balance of phosphorus-accumulating organisms (PAOs), denitrifying PAOs (DPAOs), and denitrifying glycogen-accumulating organisms (DGAOs). The optimized system, featuring a recycle loop and reduced aerobic phase duration, achieved nitrogen and phosphorus removal efficiencies of (95.13%±0.35%) and (94.70%±0.96%), respectively. Mechanistic analysis suggested that the A1 phase created an anoxic environment conducive to DPAO-mediated denitrifying phosphorus removal, while the A2 phase supported DGAO-driven denitrifying nitrogen removal using polyhydroxyalkanoates (PHAs) and glycogen (Gly). Extracellular polymeric substance (EPS) analysis revealed increases of 35.38mg/gVSS in protein (PN) and 12.39mg/gVSS in polysaccharide (PS) content, enhancing sludge aggregation. Microbial community analysis demonstrated significant enrichment of Dechloromonas and Ca. Competibacter, with their abundances increasing from 2.24% and 1.53% in R1to 7.61% and 7.94% in R2, respectively. The A/A1/O/A2 mode effectively created a synergistic environment for key DPAOs and DGAOs, achieving superior nitrogen and phosphorus removal performance compared to conventional modes.

nitrogen and phosphorus removal  /  denitrifying phosphorus removal  /  endogenous denitrification  /  EPS
Dong LI, Sai-yue QI, Si-bo FU, Yan-jun ZHU, Qin-yuan WANG, Jie ZHANG. Highly efficient nitrogen and phosphorus removal by a novel denitrifying phosphorus removal system operated in an anaerobic-anoxic-aerobic-anoxic mode[J]. China Environmental Science, 2025 , 45 (6) : 3001 -3009 .
Appendix
Less
Year 2025 volume 45 Issue 6
PDF
35
14
Cite this Article
BibTeX
Article Info
  • Receive Date：2024-11-08
  • Online Date：2026-02-27
  • Published：2025-06-20
Article Data
Affiliations
History
  • Received：2024-11-08
Funding
Affiliations
    1.Beijing Key Laboratory of Water Quality Science and Water Environment Restoration Project, Beijing University of Technology, Beijing 100124, China
    2.State Key Laboratory of Urban Water Resources and Water Environment, Harbin University of Technology, Harbin 150090, China
References
Share
https://castjournals.cast.org.cn/joweb/zghjkx/EN/
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House