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Characterization and mechanism analysis of tylosin biodegradation and simultaneous ammonia nitrogen removal with strain Klebsiella pneumoniae TN-1
- Source :
- Bioresource technology. 336
- Publication Year :
- 2021
-
Abstract
- A novel bacterial strain that exhibited a high capacity for the simultaneous degradation and removal of tylosin and ammonia nitrogen, respectively, was isolated from tylosin fermentation dregs (TFDs) and identified as Klebsiella pneumoniae TN-1. The removal efficiencies of tylosin and ammonia nitrogen reached 95.31% and 83.26%, respectively, at initial concentrations of 300 mg/L for both. Three identified intermediates with less toxicity indicated that de-sugarization and hydrolysis were the proposed biodegradation pathways. The results also suggested that strain TN-1 could reduce nitrogen loss by transforming ammonium into nitrate nitrogen according to the transcriptional expression of nitrogen transformation-related genes and the activities of functional enzymes. Moreover, strain TN-1 effectively reduced ammonia volatilization by 65.20% and facilitated tylosin degradation, with a maximum removal efficiency of 57.35% in the simulated fermentation process of TFDs. This work provides an efficient bioaugmentation for simultaneous antibiotic degradation and nitrogen conservation during the composting process.
- Subjects :
- 0106 biological sciences
Bioaugmentation
Environmental Engineering
Nitrogen
chemistry.chemical_element
Bioengineering
010501 environmental sciences
Tylosin
01 natural sciences
Hydrolysis
chemistry.chemical_compound
Ammonia
010608 biotechnology
Ammonium
Food science
Waste Management and Disposal
0105 earth and related environmental sciences
Renewable Energy, Sustainability and the Environment
General Medicine
Biodegradation
Ammonia volatilization from urea
Klebsiella pneumoniae
chemistry
Denitrification
Fermentation
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 336
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....8756fb2a3e056848eb632b5a38faf06c