Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3
The discharge of organic and inorganic nitrogenous pollutants in wastewater leads to eutrophication and disrupts the ecological balance. Therefore, the pressing need for an effective treatment method has become increasingly evident. A robust bacterium <i>Pseudomonas stutzeri</i> H3 capab...
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MDPI AG
2025-03-01
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| author | Jie Hu Bing Xu Jiabao Yan Guozhi Fan |
| author_facet | Jie Hu Bing Xu Jiabao Yan Guozhi Fan |
| author_sort | Jie Hu |
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| description | The discharge of organic and inorganic nitrogenous pollutants in wastewater leads to eutrophication and disrupts the ecological balance. Therefore, the pressing need for an effective treatment method has become increasingly evident. A robust bacterium <i>Pseudomonas stutzeri</i> H3 capable of simultaneous organic and inorganic nitrogen removal was isolated from the activated sludge in the coking wastewater treatment system. The optimal conditions for the simultaneous removal of ammonium nitrogen and quinoline were as follows: C/N ratio of 15–20, initial pH of 7–8, culture temperature of 30 °C, and shaking speed of 150–300 rpm. At 200 mg/L ammonium nitrogen and 100 mg/L quinoline, strain H3 achieved above 90% of removal efficiency, exhibiting excellent simultaneous nitrogen removal capabilities. The outstanding nitrogen removal efficiencies in the presence of quinoline and different inorganic nitrogen sources further confirmed the simultaneous organic and inorganic nitrogen removal capability of strain H3. The whole genome sequencing and nitrogen metabolic intermediates determination of strain H3 were performed to elucidate the gene function annotations, nitrogen removal function genes, and nitrogen metabolic pathways. The findings provide a promising pathway to treat the organic and inorganic nitrogenous pollutants in wastewater. |
| format | Article |
| id | doaj-art-4dc67c82fc3f4a7f96e4da50be46c48d |
| institution | DOAJ |
| issn | 2076-2607 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Microorganisms |
| spelling | doaj-art-4dc67c82fc3f4a7f96e4da50be46c48d2025-08-20T02:42:22ZengMDPI AGMicroorganisms2076-26072025-03-0113368710.3390/microorganisms13030687Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3Jie Hu0Bing Xu1Jiabao Yan2Guozhi Fan3School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, ChinaSchool of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, ChinaHubei Province Key Laboratory of Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, ChinaThe discharge of organic and inorganic nitrogenous pollutants in wastewater leads to eutrophication and disrupts the ecological balance. Therefore, the pressing need for an effective treatment method has become increasingly evident. A robust bacterium <i>Pseudomonas stutzeri</i> H3 capable of simultaneous organic and inorganic nitrogen removal was isolated from the activated sludge in the coking wastewater treatment system. The optimal conditions for the simultaneous removal of ammonium nitrogen and quinoline were as follows: C/N ratio of 15–20, initial pH of 7–8, culture temperature of 30 °C, and shaking speed of 150–300 rpm. At 200 mg/L ammonium nitrogen and 100 mg/L quinoline, strain H3 achieved above 90% of removal efficiency, exhibiting excellent simultaneous nitrogen removal capabilities. The outstanding nitrogen removal efficiencies in the presence of quinoline and different inorganic nitrogen sources further confirmed the simultaneous organic and inorganic nitrogen removal capability of strain H3. The whole genome sequencing and nitrogen metabolic intermediates determination of strain H3 were performed to elucidate the gene function annotations, nitrogen removal function genes, and nitrogen metabolic pathways. The findings provide a promising pathway to treat the organic and inorganic nitrogenous pollutants in wastewater.https://www.mdpi.com/2076-2607/13/3/687simultaneous nitrogen removalorganic nitrogeninorganic nitrogennitrogen metabolic pathwaywhole genome sequencing |
| spellingShingle | Jie Hu Bing Xu Jiabao Yan Guozhi Fan Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 Microorganisms simultaneous nitrogen removal organic nitrogen inorganic nitrogen nitrogen metabolic pathway whole genome sequencing |
| title | Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 |
| title_full | Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 |
| title_fullStr | Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 |
| title_full_unstemmed | Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 |
| title_short | Characteristics and Mechanisms of Simultaneous Quinoline and Ammonium Nitrogen Removal by a Robust Bacterium <i>Pseudomonas stutzeri</i> H3 |
| title_sort | characteristics and mechanisms of simultaneous quinoline and ammonium nitrogen removal by a robust bacterium i pseudomonas stutzeri i h3 |
| topic | simultaneous nitrogen removal organic nitrogen inorganic nitrogen nitrogen metabolic pathway whole genome sequencing |
| url | https://www.mdpi.com/2076-2607/13/3/687 |
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