Key factors governing the performance and microbial community of one-stage partial nitritation and anammox system with bio-carriers and airlift circulation

Hong Chen, Hong Wang, Guanlong Yu, Ying Xiong, Haipeng Wu, Min Yang, Rong Chen, Enzhe Yang, Changbo Jiang, Yu You Li

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A one-stage airlift internal circulation biofilm reactor was continuously operated for 668 days to treat 50 mg/L of ammonia wastewater to pursue the long-term stability of partial nitritation and anammox (PNA) process. The operational performance and microbial community structure of the biofilm and the flocs were investigated. A nitrogen removal efficiency (NRE) of 70% was obtained successfully at a dissolved oxygen (DO) of 0.05–0.15 mg/L by regulating aeration rate. The microbial analysis indicated Candidatus Brocadia (29.5%) and Nitrosomonas (6.8%) were dominant in both biofilms and flocs. It was found that DO control and aeration rate were the key factors in performance stability, and a stable performance could be recovered and maintained under oxygen-limiting conditions. Further, the achievement of activated ammonia oxidation bacteria (AOB), dominated anammox bacteria (AMX), suppressed NOB, and controlled heterotrophic bacteria (HB) in the biofilms played a major role in the long-term stable operation.

Original languageEnglish
Article number124668
JournalBioresource Technology
Volume324
DOIs
Publication statusPublished - 2021 Mar

Keywords

  • Airlift
  • Bio-carriers
  • Brocadia
  • Key factors
  • Partial nitritation and anammox (PNA)

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Fingerprint Dive into the research topics of 'Key factors governing the performance and microbial community of one-stage partial nitritation and anammox system with bio-carriers and airlift circulation'. Together they form a unique fingerprint.

Cite this