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Characteristics and mechanism of heterotrophic nitrification/aerobic denitrification in a novel Halomonas piezotolerans strain
- Source :
- Journal of basic microbiologyREFERENCES. 62(2)
- Publication Year :
- 2021
-
Abstract
- A strain was isolated from an activated sludge system and identified as Halomonas piezotolerans HN2 in this study, which is the first strain in H. piezotolerans with the capability of heterotrophic nitrification and aerobic denitrification. Strain HN2 showed the maximum nitrogen removal rate of 9.10 mg/L/h by utilizing ammonium at the salinity of 3.0%. Under saline environment, HN2 could remove nitrogen efficiently in neutral and slightly alkaline environments, with the carbon sources of sodium succinate and sodium citrate and the C/N ratio of 15-20, and the maximum removal efficiencies of ammonium, nitrite, and nitrate were 100%, 96.35%, and 99.7%, respectively. The genomic information revealed the presence of amoA, napA, and nosZ genes in strain HN2, and the target bands of nirS were obtained via a polymerase chain reaction. Therefore, we inferred that ammonium was mainly utilized for the growth of strain HN2 through assimilation, and another part of the initial ammonium was converted into nitrate through nitrification, and then into gaseous nitrogen through denitrification. This report indicated the potential application of strain HN2 and other nitrifying and denitrifying Halomonas strains in the removal of nitrogen pollution in marine-related environments and also implies the important role of Halomonas in the nitrogen cycle process of the ocean.
- Subjects :
- Halomonas
Denitrification
biology
Chemistry
Nitrogen
Heterotrophic Processes
General Medicine
biology.organism_classification
Applied Microbiology and Biotechnology
Nitrification
Aerobiosis
Denitrifying bacteria
chemistry.chemical_compound
Nitrate
Aerobic denitrification
Environmental chemistry
Ammonium Compounds
Ammonium
Nitrogen cycle
Nitrites
Subjects
Details
- ISSN :
- 15214028
- Volume :
- 62
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of basic microbiologyREFERENCES
- Accession number :
- edsair.doi.dedup.....30fd7da71d87c3d8ca5c03556536c59a