Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland
This study investigates the impact of aeration strategy on the performance of total nitrogen (TN) removal in a compact hybrid aerated treatment wetland (TW), called Rhizosph'air®. The system combines a single-stage French vertical flow wetland with an aerated horizontal-flow wetland, offering a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IWA Publishing
2023-12-01
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| Series: | Blue-Green Systems |
| Subjects: | |
| Online Access: | http://bgs.iwaponline.com/content/5/2/321 |
| _version_ | 1797369630096883712 |
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| author | Caroline Kimie Miyazaki Ania Morvannou Elodie Higelin Jaime Nivala Pascal Molle |
| author_facet | Caroline Kimie Miyazaki Ania Morvannou Elodie Higelin Jaime Nivala Pascal Molle |
| author_sort | Caroline Kimie Miyazaki |
| collection | DOAJ |
| description | This study investigates the impact of aeration strategy on the performance of total nitrogen (TN) removal in a compact hybrid aerated treatment wetland (TW), called Rhizosph'air®. The system combines a single-stage French vertical flow wetland with an aerated horizontal-flow wetland, offering a unique and flexible approach for optimizing TN removal. In total, seven experimental conditions were tested, with different aeration modes, hydraulic loading rates and ammonium addition. The wetland system demonstrated high performance in terms of chemical oxygen demand removal (>85%) and solids removal (>90%), regardless of the experimental condition. However, TN removal was found to be directly impacted by operational changes. Increasing the hydraulic loading rate from 0.15 to 0.25 m/day led to an improvement in TN removal, achieving over 60%. Furthermore, when ammonium was added to the inlet and when the aeration timing was synced with the timing of the influent batch load, the environmental conditions facilitated the denitrification process, resulting in TN removal of approximately 70% and the lowest effluent NO3-N concentrations (8.70 ± 4.40 mg/L). In summary, the timing of the aeration strategy according to influent batch loading improved TN removal, suggesting its potential for optimization in future studies.
HIGHLIGHTS
This study explored different experimental conditions to understand the impact of aeration on the dynamics of nitrogen removal in a hybrid aerated treatment wetland.;
The total nitrogen removal is limited when the aeration is controlled according to time.;
The transition from time-based to batch-hour aeration strategy increased the denitrification process, resulting in 70% removal of total nitrogen.; |
| first_indexed | 2024-03-08T17:49:41Z |
| format | Article |
| id | doaj.art-fc75880da587456babc3dbe1065f92aa |
| institution | Directory Open Access Journal |
| issn | 2617-4782 |
| language | English |
| last_indexed | 2024-03-08T17:49:41Z |
| publishDate | 2023-12-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Blue-Green Systems |
| spelling | doaj.art-fc75880da587456babc3dbe1065f92aa2024-01-02T09:27:46ZengIWA PublishingBlue-Green Systems2617-47822023-12-015232133510.2166/bgs.2023.045045Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetlandCaroline Kimie Miyazaki0Ania Morvannou1Elodie Higelin2Jaime Nivala3Pascal Molle4 INRAE, UR REVERSAAL, 5 Rue de la Doua, 69100 Villeurbanne, Villeurbanne, France Eco Bird, 3 route du Dôme, 69630 Chaponost, France INRAE, UR REVERSAAL, 5 Rue de la Doua, 69100 Villeurbanne, Villeurbanne, France INRAE, UR REVERSAAL, 5 Rue de la Doua, 69100 Villeurbanne, Villeurbanne, France INRAE, UR REVERSAAL, 5 Rue de la Doua, 69100 Villeurbanne, Villeurbanne, France This study investigates the impact of aeration strategy on the performance of total nitrogen (TN) removal in a compact hybrid aerated treatment wetland (TW), called Rhizosph'air®. The system combines a single-stage French vertical flow wetland with an aerated horizontal-flow wetland, offering a unique and flexible approach for optimizing TN removal. In total, seven experimental conditions were tested, with different aeration modes, hydraulic loading rates and ammonium addition. The wetland system demonstrated high performance in terms of chemical oxygen demand removal (>85%) and solids removal (>90%), regardless of the experimental condition. However, TN removal was found to be directly impacted by operational changes. Increasing the hydraulic loading rate from 0.15 to 0.25 m/day led to an improvement in TN removal, achieving over 60%. Furthermore, when ammonium was added to the inlet and when the aeration timing was synced with the timing of the influent batch load, the environmental conditions facilitated the denitrification process, resulting in TN removal of approximately 70% and the lowest effluent NO3-N concentrations (8.70 ± 4.40 mg/L). In summary, the timing of the aeration strategy according to influent batch loading improved TN removal, suggesting its potential for optimization in future studies. HIGHLIGHTS This study explored different experimental conditions to understand the impact of aeration on the dynamics of nitrogen removal in a hybrid aerated treatment wetland.; The total nitrogen removal is limited when the aeration is controlled according to time.; The transition from time-based to batch-hour aeration strategy increased the denitrification process, resulting in 70% removal of total nitrogen.;http://bgs.iwaponline.com/content/5/2/321aerated wetlandconstructed wetlandfrench vertical flowhorizontal flowwastewater |
| spellingShingle | Caroline Kimie Miyazaki Ania Morvannou Elodie Higelin Jaime Nivala Pascal Molle Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland Blue-Green Systems aerated wetland constructed wetland french vertical flow horizontal flow wastewater |
| title | Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| title_full | Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| title_fullStr | Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| title_full_unstemmed | Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| title_short | Aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| title_sort | aeration strategies and total nitrogen removal in a hybrid aerated treatment wetland |
| topic | aerated wetland constructed wetland french vertical flow horizontal flow wastewater |
| url | http://bgs.iwaponline.com/content/5/2/321 |
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