Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product
Struvite precipitation is a well-known technology to recover and upcycle phosphorus from municipal wastewater as a slow-release fertiliser. However, the economic and environmental costs of struvite precipitation are constrained by using technical-grade reagents as a magnesium source. This research e...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Navarra |
| Repositorio: | Dadun. Depósito Académico Digital de la Universidad de Navarra |
| Idioma: | inglés |
| OAI Identifier: | oai:dadun.unav.edu:10171/67561 |
| Acceso en línea: | https://hdl.handle.net/10171/67561 |
| Access Level: | acceso abierto |
| Palabra clave: | Magnesium ammonium phosphate Circular economy Phosphorus recovery Wastewater treatment Low-grade MgO Magnesium by-product |
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Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-productAguilar-Pozo, V.B. (V. B.)|||/items/c081e18e-1e0a-45d8-8a3b-6905130dc8caChimenos, J.M. (J. M.)|||/items/709ec45f-a403-4b40-a64a-a0608b7560ebElduayen-Echave, B. (Beñat)|||/items/a656a24e-186d-4af3-9cab-b456995d446eOlaciregui-Arizmendi, K. (Kepa)|||/items/1281d052-11b0-4a01-be02-7627e111d41bLópez-Martin, A. (Andrea)|||/items/197c460c-ecd7-4096-ba44-6a81c7103f38Gómez, J. (J.)|||/items/9702e80e-d5e4-49f0-9b58-67e3b36ac4a1Guembe, M. (M.)|||/items/efd7434c-56df-4458-bb9e-1e6cb7b5851eGarcía-Zubiri, I.X. (Íñigo Xabier)|||/items/021cdf57-e4f2-4904-8453-abe43c0f5a28Ayesa-Iturrate, E. (Eduardo)|||/items/bb079310-65ee-46bf-a4dd-1e279afdddbaAstals-García, S.(Sergi)|||/items/b2baa261-5804-4471-9f53-39d1ea2d2d0bMagnesium ammonium phosphateCircular economyPhosphorus recoveryWastewater treatmentLow-grade MgOMagnesium by-productStruvite precipitation is a well-known technology to recover and upcycle phosphorus from municipal wastewater as a slow-release fertiliser. However, the economic and environmental costs of struvite precipitation are constrained by using technical-grade reagents as a magnesium source. This research evaluates the feasibility of using a low-grade magnesium oxide (LG-MgO) by-product from the calcination of magnesite as a magnesium source to precipitate struvite from anaerobic digestion supernatants in wastewater treatment plants. Three distinct LG-MgOs were used in this research to capture the inherent variability of this by-product. The MgO content of the LG-MgOs varied from 42 % to 56 %, which governed the reactivity of the by-product. Experimental results showed that dosing LG-MgO at P:Mg molar ratio close to stoichiometry (i.e. 1:1 and 1:2) favoured struvite precipitation, whereas higher molar ratios (i.e. 1:4, 1:6 and 1:8) favoured calcium phosphate precipitation due to the higher calcium concentration and pH. At a P: Mg molar ratio of 1:1 and 1:2, the percentage of phosphate precipitated was 53-72 % and 89-97 %, respectively, depending on the LG-MgO reactivity. A final experiment was performed to examine the composition and morphology of the precipitate obtained under the most favourable conditions, which showed that (i) struvite was the mineral phase with the highest peaks intensity and (ii) struvite was present in two different shapes: hopper and polyhedral. Overall,Dadun. Depósito Académico Digital Universidad de Navarra20232023-10-0320232023-01-0120232023-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10171/67561reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/675612026-06-21T12:47:57Z |
| dc.title.none.fl_str_mv |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| title |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| spellingShingle |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product Aguilar-Pozo, V.B. (V. B.)|||/items/c081e18e-1e0a-45d8-8a3b-6905130dc8ca Magnesium ammonium phosphate Circular economy Phosphorus recovery Wastewater treatment Low-grade MgO Magnesium by-product |
| title_short |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| title_full |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| title_fullStr |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| title_full_unstemmed |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| title_sort |
Struvite precipitation in wastewater treatment plants anaerobic digestion supernatants using a magnesium oxide by-product |
| dc.creator.none.fl_str_mv |
Aguilar-Pozo, V.B. (V. B.)|||/items/c081e18e-1e0a-45d8-8a3b-6905130dc8ca Chimenos, J.M. (J. M.)|||/items/709ec45f-a403-4b40-a64a-a0608b7560eb Elduayen-Echave, B. (Beñat)|||/items/a656a24e-186d-4af3-9cab-b456995d446e Olaciregui-Arizmendi, K. (Kepa)|||/items/1281d052-11b0-4a01-be02-7627e111d41b López-Martin, A. (Andrea)|||/items/197c460c-ecd7-4096-ba44-6a81c7103f38 Gómez, J. (J.)|||/items/9702e80e-d5e4-49f0-9b58-67e3b36ac4a1 Guembe, M. (M.)|||/items/efd7434c-56df-4458-bb9e-1e6cb7b5851e García-Zubiri, I.X. (Íñigo Xabier)|||/items/021cdf57-e4f2-4904-8453-abe43c0f5a28 Ayesa-Iturrate, E. (Eduardo)|||/items/bb079310-65ee-46bf-a4dd-1e279afdddba Astals-García, S.(Sergi)|||/items/b2baa261-5804-4471-9f53-39d1ea2d2d0b |
| author |
Aguilar-Pozo, V.B. (V. B.)|||/items/c081e18e-1e0a-45d8-8a3b-6905130dc8ca |
| author_facet |
Aguilar-Pozo, V.B. (V. B.)|||/items/c081e18e-1e0a-45d8-8a3b-6905130dc8ca Chimenos, J.M. (J. M.)|||/items/709ec45f-a403-4b40-a64a-a0608b7560eb Elduayen-Echave, B. (Beñat)|||/items/a656a24e-186d-4af3-9cab-b456995d446e Olaciregui-Arizmendi, K. (Kepa)|||/items/1281d052-11b0-4a01-be02-7627e111d41b López-Martin, A. (Andrea)|||/items/197c460c-ecd7-4096-ba44-6a81c7103f38 Gómez, J. (J.)|||/items/9702e80e-d5e4-49f0-9b58-67e3b36ac4a1 Guembe, M. (M.)|||/items/efd7434c-56df-4458-bb9e-1e6cb7b5851e García-Zubiri, I.X. (Íñigo Xabier)|||/items/021cdf57-e4f2-4904-8453-abe43c0f5a28 Ayesa-Iturrate, E. (Eduardo)|||/items/bb079310-65ee-46bf-a4dd-1e279afdddba Astals-García, S.(Sergi)|||/items/b2baa261-5804-4471-9f53-39d1ea2d2d0b |
| author_role |
author |
| author2 |
Chimenos, J.M. (J. M.)|||/items/709ec45f-a403-4b40-a64a-a0608b7560eb Elduayen-Echave, B. (Beñat)|||/items/a656a24e-186d-4af3-9cab-b456995d446e Olaciregui-Arizmendi, K. (Kepa)|||/items/1281d052-11b0-4a01-be02-7627e111d41b López-Martin, A. (Andrea)|||/items/197c460c-ecd7-4096-ba44-6a81c7103f38 Gómez, J. (J.)|||/items/9702e80e-d5e4-49f0-9b58-67e3b36ac4a1 Guembe, M. (M.)|||/items/efd7434c-56df-4458-bb9e-1e6cb7b5851e García-Zubiri, I.X. (Íñigo Xabier)|||/items/021cdf57-e4f2-4904-8453-abe43c0f5a28 Ayesa-Iturrate, E. (Eduardo)|||/items/bb079310-65ee-46bf-a4dd-1e279afdddba Astals-García, S.(Sergi)|||/items/b2baa261-5804-4471-9f53-39d1ea2d2d0b |
| author2_role |
author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Dadun. Depósito Académico Digital Universidad de Navarra |
| dc.subject.none.fl_str_mv |
Magnesium ammonium phosphate Circular economy Phosphorus recovery Wastewater treatment Low-grade MgO Magnesium by-product |
| topic |
Magnesium ammonium phosphate Circular economy Phosphorus recovery Wastewater treatment Low-grade MgO Magnesium by-product |
| description |
Struvite precipitation is a well-known technology to recover and upcycle phosphorus from municipal wastewater as a slow-release fertiliser. However, the economic and environmental costs of struvite precipitation are constrained by using technical-grade reagents as a magnesium source. This research evaluates the feasibility of using a low-grade magnesium oxide (LG-MgO) by-product from the calcination of magnesite as a magnesium source to precipitate struvite from anaerobic digestion supernatants in wastewater treatment plants. Three distinct LG-MgOs were used in this research to capture the inherent variability of this by-product. The MgO content of the LG-MgOs varied from 42 % to 56 %, which governed the reactivity of the by-product. Experimental results showed that dosing LG-MgO at P:Mg molar ratio close to stoichiometry (i.e. 1:1 and 1:2) favoured struvite precipitation, whereas higher molar ratios (i.e. 1:4, 1:6 and 1:8) favoured calcium phosphate precipitation due to the higher calcium concentration and pH. At a P: Mg molar ratio of 1:1 and 1:2, the percentage of phosphate precipitated was 53-72 % and 89-97 %, respectively, depending on the LG-MgO reactivity. A final experiment was performed to examine the composition and morphology of the precipitate obtained under the most favourable conditions, which showed that (i) struvite was the mineral phase with the highest peaks intensity and (ii) struvite was present in two different shapes: hopper and polyhedral. Overall, |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2023-10-03 2023 2023-01-01 2023 2023-01-01 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/10171/67561 |
| url |
https://hdl.handle.net/10171/67561 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 |
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openAccess |
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application/pdf |
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reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra instname:Universidad de Navarra |
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Universidad de Navarra |
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Dadun. Depósito Académico Digital de la Universidad de Navarra |
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Dadun. Depósito Académico Digital de la Universidad de Navarra |
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15,300719 |