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Ammonium removal characteristics of an acid-resistant bacterium Acinetobacter sp. JR1 from pharmaceutical wastewater capable of heterotrophic nitrification-aerobic denitrification
- Source :
- Bioresource Technology. 274:56-64
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- A new acid-resistant bacterium Acinetobacter sp. JR1 was isolated, and its feasibility in nitrogen removal was investigated under acidic condition. Results show that JR1 indicated excellent ammonium and nitrate removal abilities with no accumulation of intermediates, and the maximum ammonium and nitrate removal efficiencies were 98.5% and 91.1%, respectively. Further experiments demonstrated that JR1 preferred to use ammonium with ammonium and nitrate as the mixed N-sources. For JR1, ammonium was assimilated directly as nutrients into cells and also converted into N2 through heterotrophic nitrification-aerobic denitrification. Under acidic condition, JR1 performed comparable nitrogen removal abilities to other strains under neutral or weak alkaline environment, and the efficient removal of ammonium occurred at pH 4.5–10, C/N 12–24, 20–40 °C, DO ≥4.72 mg/L, 0–1.5% of salinity, 10 mg/L Zn2+ or 20 mg/L Mn2+. All these make JR1 a promising candidate for treating acidic wastewater containing nitrogen.
- Subjects :
- 0106 biological sciences
Environmental Engineering
Denitrification
Nitrogen
chemistry.chemical_element
Bioengineering
Wastewater
010501 environmental sciences
01 natural sciences
chemistry.chemical_compound
Nitrate
010608 biotechnology
Aerobic denitrification
Ammonium Compounds
Ammonium
Waste Management and Disposal
Nitrites
0105 earth and related environmental sciences
Nitrates
Acinetobacter
Renewable Energy, Sustainability and the Environment
Heterotrophic Processes
General Medicine
Nitrification
Aerobiosis
Salinity
Pharmaceutical Preparations
chemistry
Environmental chemistry
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 274
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....4c5bdc047028fb16ef2dc2409f3adc53