Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR: Fid-Bau Portal

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Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR

Liangkai Wang / Xinyu Mao / Yousef Alhaj Hamoud / Ningyuan Zhu / Xiaohou Shao / Qilin Wang / Hiba Shaghaleh

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, ${NH}_{4}^{+}$ -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 ${NO}_{2}^{-}$ -N accumulation. ${NO}_{2}^{-}$ -N produced in shortcut nitrification entered the ceramsite through complex mass transfer, and denitrifying bacteria can reduce these ${NO}_{2}^{-}$ -N to N₂.

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Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR

Liangkai Wang / Xinyu Mao / Yousef Alhaj Hamoud / Ningyuan Zhu / Xiaohou Shao / Qilin Wang / Hiba Shaghaleh

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, ${NH}_{4}^{+}$ -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 ${NO}_{2}^{-}$ -N accumulation. ${NO}_{2}^{-}$ -N produced in shortcut nitrification entered the ceramsite through complex mass transfer, and denitrifying bacteria can reduce these ${NO}_{2}^{-}$ -N to N₂.

Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR

Liangkai Wang / Xinyu Mao / Yousef Alhaj Hamoud / Ningyuan Zhu / Xiaohou Shao / Qilin Wang / Hiba Shaghaleh

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, ${NH}_{4}^{+}$ -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 ${NO}_{2}^{-}$ -N accumulation. ${NO}_{2}^{-}$ -N produced in shortcut nitrification entered the ceramsite through complex mass transfer, and denitrifying bacteria can reduce these ${NO}_{2}^{-}$ -N to N₂.

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Title:

Nitrogen Removal for Low Concentration Ammonium Wastewater by Adsorption, Shortcut Simultaneous Nitrification and Denitrification Process in MBBR

Contributors:

Liangkai Wang (author) / Xinyu Mao (author) / Yousef Alhaj Hamoud (author) / Ningyuan Zhu (author) / Xiaohou Shao (author) / Qilin Wang (author) / Hiba Shaghaleh (author)

Published in:

Water, Vol 15, Iss 7, p 1334 (2023)

Publication date:

2023

ISSN:

DOI:

https://doi.org/10.3390/w15071334

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

moving bed biofilm reactor , adsorption , shortcut simultaneous nitrification and denitrification , aquaculture wastewater , low concentration ammonium , Hydraulic engineering , TC1-978 , Water supply for domestic and industrial purposes , TD201-500

Metadata by DOAJ is licensed under CC BY-SA 1.0

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