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Simultaneous removal of phosphorous and nitrogen by ammonium assimilation and aerobic denitrification of novel phosphate-accumulating organism Pseudomonas chloritidismutans K14
- Source :
- Bioresource Technology. 340:125621
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Pseudomonas chloritidismutans K14, a novel phosphate-accumulating organism with the capacity to perform ammonium assimilation, aerobic denitrification, and phosphorus removal, was isolated from aquaculture sediments. It produced no hemolysin, and showed susceptibility to most antibiotics. Optimum conditions were achieved with sodium pyruvate as a carbon source, a C/N ratio of 10, pH of 7.5, temperature of 27 °C, P/N ratio of 0.26, and shaking at 140 rpm. Under optimum conditions, the highest removal efficiencies of ammonium, nitrite, and nitrate were 99.82%, 99.11%, and 99.78%, respectively; the corresponding removal rates were 6.27, 4.51, and 4.99 mg/L/h. The strain removed over 98% of phosphorus, and over 87% of chemical oxygen demand. The highest biomass nitrogen during ammonium assimilation was 99.18 mg/L; no gaseous nitrogen was produced. The genes involved in nitrogen and phosphorus removal were amplified by PCR. This study demonstrated the potential application prospects of strain K14 for nitrogen and phosphorus removal.
- Subjects :
- Environmental Engineering
Nitrogen
Renewable Energy, Sustainability and the Environment
Phosphorus
Chemical oxygen demand
chemistry.chemical_element
Bioengineering
General Medicine
Phosphate
Nitrification
Aerobiosis
Phosphates
chemistry.chemical_compound
chemistry
Nitrate
Pseudomonas
Environmental chemistry
Aerobic denitrification
Ammonium Compounds
Denitrification
Ammonium
Nitrite
Waste Management and Disposal
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 340
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....558210e6fc891bddea18b4a9237390ad