Publication
Combining novel membrane technologies for sustainable nutrient recovery from digestate: effect of solid content
| datacite.subject.fos | Engenharia e Tecnologia::Engenharia do Ambiente | |
| datacite.subject.sdg | 11:Cidades e Comunidades Sustentáveis | |
| dc.contributor.author | Riaño, Berta | |
| dc.contributor.author | Oliveira, Verónica | |
| dc.contributor.author | Ferreira, Célia | |
| dc.contributor.author | Molinuevo-Salces, Beatriz | |
| dc.contributor.author | García-González, Maria Cruz | |
| dc.date.accessioned | 2025-05-05T10:30:12Z | |
| dc.date.available | 2025-05-05T10:30:12Z | |
| dc.date.issued | 2025-03-25 | |
| dc.description.abstract | Nutrient recovery from anaerobic digestate has gained increasing importance in recent years due to its potential to reduce resource dependency and to close nutrient cycles. The aim of this work is to evaluate the influence of a previous solid–liquid separation phase on nutrient recovery efficiency using two innovative membrane technologies, namely, gas-permeable membranes (GPM) and electrodialytic (ED) processes, applied individually or in combination. The obtained results were compared with those obtained through the centrifugation of the raw digestate and direct chemical precipitation followed by centrifugation in terms of the efficiency in the recovery of N (nitrogen) and P (phosphorous). A total of nine scenarios of digestate processing were compared. GPM technology allowed for the recovery of 65% of the N content in the raw digestate (41.5 g total solids (TS) kg−1) and 67% of N in the liquid fraction (28.0 g TS kg−1), without any significant difference between the two scenarios. However, the results revealed significant differences in the Precovery with ED from the raw digestate (15%) and the liquid fraction (34%), suggesting that phosphorous extraction can be improved by the application of a prior solid–liquid phase. The recovery of N with the GPM technology also enhanced the further recovery of total P with the ED processes. Furthermore, the combination of these technologies allowed for the recovery of N- and P-rich solutions, which were used to precipitate secondary struvite with an efficiency of up to 85%. This research provides a practical framework for sustainable nutrient management, advancing solutions for resource efficiency and environmental stewardship. | eng |
| dc.description.sponsorship | B. Molinuevo-Salces thanks the AEI for the financial support through the grant RYC-2020-029030-I/AEI/10.13039/501100011033. V. Oliveira gives thanks for the National funding by FCT—Foundation for Science and Technology, P.I., through the institutional scientific employment program contract (doi: 10.54499/CEECINST/00077/2021/CP2798/CT0002) | |
| dc.identifier.citation | Riaño, B.; Oliveira, V.; Dias-Ferreira, C.; Molinuevo-Salces, B.; García-González, M.C. Combining Novel Membrane Technologies for Sustainable Nutrient Recovery from Digestate: Effect of Solid Content. Sustainability2025,17,2917. https:// doi.org/10.3390/su17072917 | |
| dc.identifier.doi | 10.3390/su17072917 | |
| dc.identifier.uri | http://hdl.handle.net/10400.2/19856 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | MDPI | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Nitrogen | |
| dc.subject | Phosphorous | |
| dc.subject | Chemical precipitation | |
| dc.subject | Gas-permeable membrane | |
| dc.subject | Electrodialytic process | |
| dc.subject | Sustainable use of resources | |
| dc.subject | Azoto | |
| dc.subject | Fósforo | |
| dc.subject | Precipitação química | |
| dc.subject | Membrana permeável a gás | |
| dc.subject | Processo electrodialítico | |
| dc.subject | Recursos sustentáveis | |
| dc.title | Combining novel membrane technologies for sustainable nutrient recovery from digestate: effect of solid content | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 19 | |
| oaire.citation.issue | 2917 | |
| oaire.citation.startPage | 1 | |
| oaire.citation.title | Sustainability | |
| oaire.citation.volume | 17 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Ferreira | |
| person.givenName | Célia | |
| person.identifier.ciencia-id | 931E-FBDE-2098 | |
| person.identifier.orcid | 0000-0002-7456-2538 | |
| relation.isAuthorOfPublication | e30010dd-0512-4da6-a0c9-910b47f18b4f | |
| relation.isAuthorOfPublication.latestForDiscovery | e30010dd-0512-4da6-a0c9-910b47f18b4f |