Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment
Low C/N wastewater results from a wide range of factors that significantly harm the environment. They include insufficient carbon sources, low denitrification efficiency, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semanti...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/12/911 |
| _version_ | 1827671235907026944 |
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| author | Kun Dong Xinghui Feng Wubin Wang Yuchao Chen Wei Hu Haixiang Li Dunqiu Wang |
| author_facet | Kun Dong Xinghui Feng Wubin Wang Yuchao Chen Wei Hu Haixiang Li Dunqiu Wang |
| author_sort | Kun Dong |
| collection | DOAJ |
| description | Low C/N wastewater results from a wide range of factors that significantly harm the environment. They include insufficient carbon sources, low denitrification efficiency, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N concentrations in low C/N wastewater that are too high to be treated. In this research, the membrane biofilm reactor and hydrogen-based membrane biofilm reactor (MBR-MBfR) were optimized and regulated under different operating parameters: the simulated domestic sewage with low C/N was domesticated and the domestic sewage was then denitrified. The results of the MBR-MBfR experiments indicated that a C/N ratio of two was suitable for <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, and chemical oxygen demand (COD) removal in partial nitrification-denitrification (PN-D) and hydrogen autotrophic denitrification for further treatment. The steady state for domestic wastewater was reached when the MBR-MBfR in the experimental conditions of HRT = 15 h, SRT = 20 d, 0.04 Mpa for H<sub>2</sub> pressure in MBfR, 0.4–0.8 mg/L DO in MBR, MLSS = 2500 mg/L(MBR) and 2800 mg/L(MBfR), and effluent concentrations of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N were 4.3 ± 0.5, 1.95 ± 0.04, and 2.05 ± 0.15 mg/L, respectively. High-throughput sequencing results revealed the following: (1) The genus <i>Nitrosomonas</i> as the ammonia oxidizing bacteria (AOB) and <i>Denitratisoma</i> as potential denitrifiers were simultaneously enriched in the MBR; (2) at the genus level, <i>Meiothermus,</i><i>Lentimicrobium</i><i>, Thauera</i><i>,</i><i>Hydrogenophaga</i>, and <i>Desulfotomaculum</i> played a dominant role in leading to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N removal in the MBfR. |
| first_indexed | 2024-03-10T03:36:17Z |
| format | Article |
| id | doaj.art-8191ec99c17a4f5e847fe49ad9446d91 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-10T03:36:17Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
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| series | Membranes |
| spelling | doaj.art-8191ec99c17a4f5e847fe49ad9446d912023-11-23T09:29:47ZengMDPI AGMembranes2077-03752021-11-01111291110.3390/membranes11120911Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further TreatmentKun Dong0Xinghui Feng1Wubin Wang2Yuchao Chen3Wei Hu4Haixiang Li5Dunqiu Wang6College of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, 319 Yanshan Street, Guilin 541006, ChinaLow C/N wastewater results from a wide range of factors that significantly harm the environment. They include insufficient carbon sources, low denitrification efficiency, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N concentrations in low C/N wastewater that are too high to be treated. In this research, the membrane biofilm reactor and hydrogen-based membrane biofilm reactor (MBR-MBfR) were optimized and regulated under different operating parameters: the simulated domestic sewage with low C/N was domesticated and the domestic sewage was then denitrified. The results of the MBR-MBfR experiments indicated that a C/N ratio of two was suitable for <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, and chemical oxygen demand (COD) removal in partial nitrification-denitrification (PN-D) and hydrogen autotrophic denitrification for further treatment. The steady state for domestic wastewater was reached when the MBR-MBfR in the experimental conditions of HRT = 15 h, SRT = 20 d, 0.04 Mpa for H<sub>2</sub> pressure in MBfR, 0.4–0.8 mg/L DO in MBR, MLSS = 2500 mg/L(MBR) and 2800 mg/L(MBfR), and effluent concentrations of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></semantics></math></inline-formula>-N, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N, and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N were 4.3 ± 0.5, 1.95 ± 0.04, and 2.05 ± 0.15 mg/L, respectively. High-throughput sequencing results revealed the following: (1) The genus <i>Nitrosomonas</i> as the ammonia oxidizing bacteria (AOB) and <i>Denitratisoma</i> as potential denitrifiers were simultaneously enriched in the MBR; (2) at the genus level, <i>Meiothermus,</i><i>Lentimicrobium</i><i>, Thauera</i><i>,</i><i>Hydrogenophaga</i>, and <i>Desulfotomaculum</i> played a dominant role in leading to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>3</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></semantics></math></inline-formula>-N removal in the MBfR.https://www.mdpi.com/2077-0375/11/12/911partial nitrification-denitrificationhydrogen autotrophic denitrificationMBR-MBfR |
| spellingShingle | Kun Dong Xinghui Feng Wubin Wang Yuchao Chen Wei Hu Haixiang Li Dunqiu Wang Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment Membranes partial nitrification-denitrification hydrogen autotrophic denitrification MBR-MBfR |
| title | Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment |
| title_full | Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment |
| title_fullStr | Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment |
| title_full_unstemmed | Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment |
| title_short | Simultaneous Partial Nitrification and Denitrification Maintained in Membrane Bioreactor for Nitrogen Removal and Hydrogen Autotrophic Denitrification for Further Treatment |
| title_sort | simultaneous partial nitrification and denitrification maintained in membrane bioreactor for nitrogen removal and hydrogen autotrophic denitrification for further treatment |
| topic | partial nitrification-denitrification hydrogen autotrophic denitrification MBR-MBfR |
| url | https://www.mdpi.com/2077-0375/11/12/911 |
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