Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.11960/3235
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DC Field | Value | Language |
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dc.contributor.author | Coura, Renata D'arc | - |
dc.contributor.author | Rodrigues, Ana Cristina | - |
dc.contributor.author | Alonso, Joaquim Mamede | - |
dc.contributor.author | Ferraz, Ana Isabel | - |
dc.contributor.author | Brito, Luis Miguel | - |
dc.contributor.author | Abrantes, João Carlos Castro | - |
dc.contributor.author | Brito, António Guerreiro | - |
dc.date.accessioned | 2023-03-08T15:25:30Z | - |
dc.date.available | 2023-03-08T15:25:30Z | - |
dc.date.issued | 2021-02-18 | - |
dc.identifier.citation | Coura, R. D., Rodrigues, A. C., Alonso, J. M., Ferraz, A. I., Brito, L. M., Abrantes, J. C. & Brito, A. G. (2021). Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems. Sustainability. 13, 2175. https://doi.org/10.3390/su13042175 | pt_PT |
dc.identifier.uri | http://hdl.handle.net/20.500.11960/3235 | - |
dc.description.abstract | The present study aimed to optimize the struvite chemical precipitation process in nitrogenrich anaerobic co-digestion systems. Struvite precipitation experiments were carried out using a mixture of cattle slurry liquid fraction and sewage sludge, with and without ultrasound pretreatment. Marine salt or MgCl2 were used as magnesium source in NH4 + :Mg2+ stoichiometric proportions of 1:1.5 and 1:3. Under the tested conditions, ammonium nitrogen and orthophosphate were removed from the mixed liquor with a maximum observed efficiency of 43% and 92%, respectively, when the ultrasound treatment was applied prior to struvite precipitation, using MgCl2 as source of magnesium (NH4 + :Mg2+ of 1:3). The operating time was 40 min. Different pretreatments were tested prior to the biomethanization experiments, struvite precipitation, ultrasound, or a combination of both pretreatments. The application of ultrasound (with an energy input of 218 kJ L−1 ) and struvite precipitation (NH4 + :Mg2+ of 1:3) increased the methane content in the biogas by 82% and reduced hydraulic retention time by 28%, when compared to the anaerobic co-digestion assays without pretreatment. The hydrolytic pretreatment increased the bioavailability of nitrogen by 5%, thus enhancing the removal efficiency of ammonium nitrogen by 20%. Consequently, an increase in the carbon to nitrogen ratio was observed, favoring the methanogenesis process. | pt_PT |
dc.language.iso | eng | pt_PT |
dc.rights | openAccess | pt_PT |
dc.subject | Ultrasound pretreatment | pt_PT |
dc.subject | Struvite precipitation | pt_PT |
dc.subject | Nutrient recovery | pt_PT |
dc.subject | Circular economy | pt_PT |
dc.subject | Anaerobic (co)digestion | pt_PT |
dc.title | Combined pretreatment by ultrasound and struvite precipitation of raw substrates: a strategy to overcome C/N ratio unbalance in nitrogen-rich anaerobic co-digestion systems | pt_PT |
dc.type | article | pt_PT |
dc.date.updated | 2022-11-02T19:12:28Z | - |
dc.description.version | 6B1D-516F-1A2A | Luís Miguel Cortez Mesquita de Brito | - |
dc.description.version | N/A | - |
dc.identifier.slug | cv-prod-2309502 | - |
degois.publication.firstPage | 2175 | pt_PT |
degois.publication.lastPage | 2175 | pt_PT |
degois.publication.volume | 13 | pt_PT |
degois.publication.issue | 4 | pt_PT |
degois.publication.title | Sustainability | pt_PT |
dc.identifier.doi | 10.3390/su13042175 | - |
dc.identifier.eid | 2-s2.0-85102180555 | - |
Appears in Collections: | ESA - Artigos indexados à WoS/Scopus |
Files in This Item:
File | Description | Size | Format | |
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17_2021_Sustainability.pdf | 1.68 MB | Adobe PDF | View/Open |
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