Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization
Anaerobic Membrane Bioreactor technology has great advantages for treating wastewater, including energy recovery from organic matter. However, when the legislation requires that effluent standards be met in sensitive areas, this treatment cannot remove the nutrients, thus the permeate generated need...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/6/1007 |
| _version_ | 1797608646330286080 |
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| author | Jesús Godifredo José Ferrer Aurora Seco Ramón Barat |
| author_facet | Jesús Godifredo José Ferrer Aurora Seco Ramón Barat |
| author_sort | Jesús Godifredo |
| collection | DOAJ |
| description | Anaerobic Membrane Bioreactor technology has great advantages for treating wastewater, including energy recovery from organic matter. However, when the legislation requires that effluent standards be met in sensitive areas, this treatment cannot remove the nutrients, thus the permeate generated needs post-treatment. Apart from the biological processes, ion exchange is an alternative treatment for this stream since it can remove nutrients and concentrate them for later recovery as fertilizers. In this work, the feasibility of using a natural zeolite (clinoptilolite) for treating NH<sub>4</sub> from AnMBR permeate was studied and tests were carried out on the adsorption kinetics of ammonium. Isotherm tests verified that activating natural zeolite to its -Na form improves its performance by 20% and increases <i>q<sub>e</sub></i> from 2.37 to 2.86 mg NH<sub>4</sub>-N/g for a Co of 30 mg NH<sub>4</sub>-N/L. It was also found that the cations present in the water (especially Ca<sup>2+</sup> and Na<sup>+</sup>) caused a 22% reduction in ammonium adsorption while organic matter was responsible for improving the retained ammonium by 22%. It was also found that the working pH (7.2 ± 0.2) is close to the optimal pH range (6–7) for zeolite performance. The tests on the AnMBR permeate indicate that clinoptilolite is a suitable material since treating this stream can retain up to 7.44 mg NH<sub>4</sub>-N/g. |
| first_indexed | 2024-03-11T05:46:07Z |
| format | Article |
| id | doaj.art-c11db68937354e60a7eeec694ab3758b |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T05:46:07Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-c11db68937354e60a7eeec694ab3758b2023-11-17T14:25:06ZengMDPI AGWater2073-44412023-03-01156100710.3390/w15061007Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite CharacterizationJesús Godifredo0José Ferrer1Aurora Seco2Ramón Barat3Instituto de Ingeniería del Agua y Medioambiente, IIAMA, Universitat Politècnica de València, 46022 Valencia, SpainInstituto de Ingeniería del Agua y Medioambiente, IIAMA, Universitat Politècnica de València, 46022 Valencia, SpainCALAGUA—Unidad Mixta UV-UPV, Departament d’Enginyeria Química, Universitat de València, 46100 Burjassot, SpainInstituto de Ingeniería del Agua y Medioambiente, IIAMA, Universitat Politècnica de València, 46022 Valencia, SpainAnaerobic Membrane Bioreactor technology has great advantages for treating wastewater, including energy recovery from organic matter. However, when the legislation requires that effluent standards be met in sensitive areas, this treatment cannot remove the nutrients, thus the permeate generated needs post-treatment. Apart from the biological processes, ion exchange is an alternative treatment for this stream since it can remove nutrients and concentrate them for later recovery as fertilizers. In this work, the feasibility of using a natural zeolite (clinoptilolite) for treating NH<sub>4</sub> from AnMBR permeate was studied and tests were carried out on the adsorption kinetics of ammonium. Isotherm tests verified that activating natural zeolite to its -Na form improves its performance by 20% and increases <i>q<sub>e</sub></i> from 2.37 to 2.86 mg NH<sub>4</sub>-N/g for a Co of 30 mg NH<sub>4</sub>-N/L. It was also found that the cations present in the water (especially Ca<sup>2+</sup> and Na<sup>+</sup>) caused a 22% reduction in ammonium adsorption while organic matter was responsible for improving the retained ammonium by 22%. It was also found that the working pH (7.2 ± 0.2) is close to the optimal pH range (6–7) for zeolite performance. The tests on the AnMBR permeate indicate that clinoptilolite is a suitable material since treating this stream can retain up to 7.44 mg NH<sub>4</sub>-N/g.https://www.mdpi.com/2073-4441/15/6/1007clinoptiloliteadsorptionammoniumPermeate Anmbr |
| spellingShingle | Jesús Godifredo José Ferrer Aurora Seco Ramón Barat Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization Water clinoptilolite adsorption ammonium Permeate Anmbr |
| title | Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization |
| title_full | Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization |
| title_fullStr | Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization |
| title_full_unstemmed | Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization |
| title_short | Zeolites for Nitrogen Recovery from the Anaerobic Membrane Bioreactor Permeate: Zeolite Characterization |
| title_sort | zeolites for nitrogen recovery from the anaerobic membrane bioreactor permeate zeolite characterization |
| topic | clinoptilolite adsorption ammonium Permeate Anmbr |
| url | https://www.mdpi.com/2073-4441/15/6/1007 |
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