Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR
Excessive discharge of ammonia nitrogen wastewater from intensive aquaculture has worsened in recent years. Therefore, there is an urgent need to develop an effective and energy-saving denitrification technology. This study intends to adopt a moving bed biofilm reactor (MBBR) to remove ammonia nitro...
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MDPI AG
2023-03-01
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| author | Liangkai Wang Xinyu Mao Yousef Alhaj Hamoud Ningyuan Zhu Xiaohou Shao Qilin Wang Hiba Shaghaleh |
| author_facet | Liangkai Wang Xinyu Mao Yousef Alhaj Hamoud Ningyuan Zhu Xiaohou Shao Qilin Wang Hiba Shaghaleh |
| author_sort | Liangkai Wang |
| collection | DOAJ |
| description | Excessive discharge of ammonia nitrogen wastewater from intensive aquaculture has worsened in recent years. Therefore, there is an urgent need to develop an effective and energy-saving denitrification technology. This study intends to adopt a moving bed biofilm reactor (MBBR) to remove ammonia nitrogen through the combination of adsorption and shortcut simultaneous nitrification and denitrification (SND). The research focuses on the operational parameters and regeneration mechanism of the MBBR adsorption-shortcut SND process. The optimal operating parameters in the adsorption stage were a hydraulic retention time of 8 h and an agitation rate of 120 r/min. For the shortcut SND stage, the ideal optimal parameters were two times alkalinity and dissolved oxygen (DO) 1.0 mg/L. Under optimal operating parameters conditions, the SND rate, TN removal rate, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>-N removal rate and nitrite accumulation rate were 89.1%, 84.0%, 94.3%, and 86.4%, respectively. The synergetic actions of ion exchange and microorganisms were the main driving force for regenerating ceramsite zeolite components. The synergistic inhibitory effect of high-concentration free ammonia and low-level DO on nitrite-oxidizing bacteria was the key to achieving stable and efficient <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N accumulation. <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N produced in shortcut nitrification entered the ceramsite through complex mass transfer, and denitrifying bacteria can reduce these <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N to N<sub>2</sub>. |
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| spelling | doaj.art-5756d94199c14e929fda84c4610fba672023-11-17T17:50:00ZengMDPI AGWater2073-44412023-03-01157133410.3390/w15071334Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBRLiangkai Wang0Xinyu Mao1Yousef Alhaj Hamoud2Ningyuan Zhu3Xiaohou Shao4Qilin Wang5Hiba Shaghaleh6College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Environment, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Agricultural Science and Engineering, Hohai University, Nanjing 210098, ChinaCollege of Environment, Hohai University, Nanjing 210098, ChinaExcessive discharge of ammonia nitrogen wastewater from intensive aquaculture has worsened in recent years. Therefore, there is an urgent need to develop an effective and energy-saving denitrification technology. This study intends to adopt a moving bed biofilm reactor (MBBR) to remove ammonia nitrogen through the combination of adsorption and shortcut simultaneous nitrification and denitrification (SND). The research focuses on the operational parameters and regeneration mechanism of the MBBR adsorption-shortcut SND process. The optimal operating parameters in the adsorption stage were a hydraulic retention time of 8 h and an agitation rate of 120 r/min. For the shortcut SND stage, the ideal optimal parameters were two times alkalinity and dissolved oxygen (DO) 1.0 mg/L. Under optimal operating parameters conditions, the SND rate, TN removal rate, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NH</mi></mrow><mn>4</mn><mo>+</mo></msubsup></mrow></semantics></math></inline-formula>-N removal rate and nitrite accumulation rate were 89.1%, 84.0%, 94.3%, and 86.4%, respectively. The synergetic actions of ion exchange and microorganisms were the main driving force for regenerating ceramsite zeolite components. The synergistic inhibitory effect of high-concentration free ammonia and low-level DO on nitrite-oxidizing bacteria was the key to achieving stable and efficient <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N accumulation. <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N produced in shortcut nitrification entered the ceramsite through complex mass transfer, and denitrifying bacteria can reduce these <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mi>NO</mi></mrow><mn>2</mn><mo>−</mo></msubsup></mrow></semantics></math></inline-formula>-N to N<sub>2</sub>.https://www.mdpi.com/2073-4441/15/7/1334moving bed biofilm reactoradsorptionshortcut simultaneous nitrification and denitrificationaquaculture wastewaterlow concentration ammonium |
| spellingShingle | Liangkai Wang Xinyu Mao Yousef Alhaj Hamoud Ningyuan Zhu Xiaohou Shao Qilin Wang Hiba Shaghaleh Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR Water moving bed biofilm reactor adsorption shortcut simultaneous nitrification and denitrification aquaculture wastewater low concentration ammonium |
| title | Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR |
| title_full | Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR |
| title_fullStr | Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR |
| title_full_unstemmed | Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR |
| title_short | Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR |
| title_sort | nitrogen removal for low concentration ammonium wastewater by adsorption shortcut simultaneous nitrification and denitrification process in mbbr |
| topic | moving bed biofilm reactor adsorption shortcut simultaneous nitrification and denitrification aquaculture wastewater low concentration ammonium |
| url | https://www.mdpi.com/2073-4441/15/7/1334 |
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