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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.creator | Oliveira, Verónica | - |
Autor(es): dc.creator | Ferreira, Célia | - |
Autor(es): dc.creator | González-García, Isabel | - |
Autor(es): dc.creator | Labrincha, João | - |
Autor(es): dc.creator | Horta, Carmo | - |
Autor(es): dc.creator | García-González, María Cruz | - |
Data de aceite: dc.date.accessioned | 2022-09-01T13:00:46Z | - |
Data de disponibilização: dc.date.available | 2022-09-01T13:00:46Z | - |
Data de envio: dc.date.issued | 2022-03-04 | - |
Data de envio: dc.date.issued | 2022-03-04 | - |
Data de envio: dc.date.issued | 2021-04-15 | - |
Data de envio: dc.date.issued | 2022-01-14 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/10400.2/11801 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/10400.2/11801 | - |
Descrição: dc.description | The recovery of valuable materials from waste fits the principle of circular economy and sustainable use of resources, but contaminants in the waste are still a major obstacle. This works proposes a novel approach to recover high-purity phosphorus (P) and nitrogen (N) from digestate of municipal solid waste based on the combination of two independent membrane processes: electrodialytic (ED) process to extract P, and gas permeable membranes (GPM) for N extraction. A laboratory ED cell was adapted to accommodate a GPM. The length of waste compartment (10 cm; 15 cm), current intensity (50 mA; 75 mA) and operation time (9 days; 12 days) were the variables tested. 81% of P in the waste was successfully extracted to the anolyte when an electric current of 75 mA was applied for 9 days, and 74% of NH4 + was extracted into an acid-trapping solution. The two purified nutrient solutions were subsequently used in the synthesis of a biofertilizer (secondary struvite) through precipitation, achieving an efficiency of 99.5%. The properties of the secondary struvite synthesized using N and P recovered from the waste were similar to secondary struvite formed using synthetic chemicals but the costs were higher due to the need to neutralize the acid-trapping solution, highlighting the need to further tune the process and make it economically more competitive. The high recycling rates of P and N achieved are encouraging and widen the possibility of replacing synthetic fertilizers, manufactured from finite sources, by secondary biofertilizers produced using nutrients extracted from wastes. | - |
Descrição: dc.description | info:eu-repo/semantics/publishedVersion | - |
Idioma: dc.language | en | - |
Direitos: dc.rights | restrictedAccess | - |
Palavras-chave: dc.subject | Phosphorus | - |
Palavras-chave: dc.subject | Nitrogen | - |
Palavras-chave: dc.subject | Struvite | - |
Palavras-chave: dc.subject | Nutrient recycling | - |
Palavras-chave: dc.subject | Waste valorization | - |
Palavras-chave: dc.subject | Seawate | - |
Título: dc.title | A novel approach for nutrients recovery from municipal waste as biofertilizers by combining electrodialytic and gas permeable membrane technologies | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Aberto - Universidade Aberta (Portugal) |
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