Journal article
Heterotrophic nitrogen removal by a newly isolated Acinetobacter calcoaceticus HNR
Bioresource technology, v 101(14), pp 5194-5200
01 Jul 2010
PMID: 20202830
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Strain HNR, isolated from a Membrane Bioreactor (MBR), demonstrates a surprising ability to convert ammonium to nitrogen gas under aerobic conditions while growing heterotrophically. On the basis of phylogenetic analysis of the 16S rRNA gene sequence, strain HNR was related to Acinetobacter calcoaceticus (98.9% identity). Nitrogen balance during heterotrophic growth with 120 mg/l of NH4+-N showed that 40.2% of NH4+-N was in the form of N-2 and 52.1% was found in biomass. Only a trace production was either nitrite or nitrate. Further tests demonstrated that nitrite and nitrate were not reduced by strain HNR under aerobic conditions. Neither nitrate reductase (NR) nor nitrite reductase (NiR) activity was detectable in the aerobic reaction mixtures. However, a 0.051 U activity of hydroxylamine oxidase (HAO) was observed. The nitrogen removal was speculated to be via a hydroxylamine intermediate instead of nitrite, which was different from the conventional nitrogen removal pathway. (C) 2010 Elsevier Ltd. All rights reserved.
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Details
- Title
- Heterotrophic nitrogen removal by a newly isolated Acinetobacter calcoaceticus HNR
- Creators
- Bin Zhao - Shanghai Jiao Tong UniversityYi Liang He - Shanghai Jiao Tong UniversityJoseph Hughes - Georgia Institute of TechnologyXiao Fan Zhang - Shanghai Jiao Tong University
- Publication Details
- Bioresource technology, v 101(14), pp 5194-5200
- Publisher
- Elsevier
- Number of pages
- 7
- Grant note
- 20676078 / National Science Foundation of China; National Natural Science Foundation of China (NSFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000277581100020
- Scopus ID
- 2-s2.0-77950339809
- Other Identifier
- 991021931900104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Agricultural Engineering
- Biotechnology & Applied Microbiology
- Energy & Fuels