Aerobic denitrification: A review of important advances of the last 30 years

• Published in: Biotechnology and bioprocess engineering Vol. 20; no. 4; pp. 643 - 651
• Main Authors: Ji, Bin, Yang, Kai, Zhu, Lei, Jiang, Yu, Wang, Hongyu, Zhou, Jun, Zhang, Huining
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Society for Biotechnology and Bioengineering 01.08.2015; Springer Nature B.V; 한국생물공학회
• Subjects: Alkalinity; Analysis; Bacteria; Batch reactors; biofilm; Biofilms; Bioreactors; Biotechnology; Chemistry; Chemistry and Materials Science; Civil engineering; Cytochrome; Denitrification; denitrifying microorganisms; Dissolved oxygen; Enzymes; gamma-Proteobacteria; genes; Gram-negative bacteria; History; Industrial and Production Engineering; Microbiology; Microorganisms; nitrate reductase; Nitrates; Nitric oxide; Nitrous oxide; oxidants; Oxidation; Oxidizing agents; Phylogenetics; phylogeny; Reactors; Respiration; Review Paper; Sludge; Studies; Trace elements; Water treatment; 생물공학; evolutionary tree; aerobic denitrification; periplasmic nitrate reductase
• ISSN: 1226-8372; 1976-3816
• DOI: 10.1007/s12257-015-0009-0

Understanding aerobic denitrification has become an important focus of environmental microbiology. Aerobic denitrification can be performed by various genera of microorganisms and describes the use of nitrate (NO ₃ ⁻) as oxidizing agents under an aerobic atmosphere. Isolation of aerobic denitrifiers, enzymes involved in aerobic denitrifiers, phylogenetic distribution of aerobic denitrifiers, factors affecting the performance of aerobic denitrifiers, attempts of applications and possible future trends are depicted. The periplasmic nitrate reductase is vital for aerobic denitrifiers and NapA gene may be the proof of aerobic denitrification. Phylogenetic analysis revealed that aerobic denitrifiers mainly belong to α-, β- and γ-Proteobacteria. Aerobic denitrifiers tend to work efficiently at 25 ~ 37°C and pH 7 ~ 8, when dissolved oxygen concentration is 3 ~ 5 mg/L and C/N load ratio is 5 ~ 10. In addition, recent progresses and applications on aerobic denitrifiers are described, including single aerobic reactors, sequencing batch reactor and biofilm reactors. The review attempts to shed light on the fundamental understanding in aerobic denitrification.