Enhancement of the denitrification in low C/N condition and its mechanism by a novel isolated Comamonas sp. YSF15
| Autor: | Jia ran Liu, Jun Feng Su, Shu Yang, Min Li, Ting lin Huang, Yi xin Yao |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nitrogen balance
Denitrification 010504 meteorology & atmospheric sciences Nitrogen Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Wastewater Toxicology 01 natural sciences chemistry.chemical_compound Denitrifying bacteria Bioremediation Extracellular polymeric substance Nitrate Nitrite Nitrites 0105 earth and related environmental sciences Nitrates Extracellular Polymeric Substance Matrix General Medicine Pollution Aerobiosis Carbon Biodegradation Environmental chemistry Comamonas Nuclear chemistry |
| Zdroj: | Environmental pollution (Barking, Essex : 1987). 256 |
| ISSN: | 1873-6424 |
| Popis: | A novel denitrifying bacterium YSF15 was isolated from the Lijiahe Reservoir in Xi’an and identified as Comamonas sp. It exhibited excellent nitrogen removal ability under low C/N conditions (C/N = 2.5) and 94.01% of nitrate was removed in 18 h, with no accumulation of nitrite. PCR amplification and nitrogen balance experiments were carried out, showing that 68.92% of initial nitrogen was removed as gas products and the nitrogen removal path was determined to be NO3−-N→NO2−-N→NO→N2O→N2. Scanning electron microscopy and three-dimensional fluorescence spectroscopy were used to track extracellular polymeric substances (EPS). The results show that complete-denitrification under low C/N conditions is associated with EPS, which may provide a reserve carbon source in extreme environments. These findings reveal that Comamonas sp. YSF15 can provide novel basic materials and a theoretical basis for wastewater bioremediation under low C/N conditions. |
| Databáze: | OpenAIRE |
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