Retention time and organic loading rate as anaerobic co-digestion key-factors for better digestate valorization practices : C and N dynamics in soils

Copyright © 2024 Elsevier Ltd. All rights reserved.

Détails bibliographiques
Publié dans:Waste management (New York, N.Y.). - 1999. - 181(2024) vom: 30. Mai, Seite 1-10
Auteur principal: Fernández-Domínguez, David (Auteur)
Autres auteurs: Sourdon, Logan, Pérémé, Margaud, Guilayn, Felipe, Steyer, Jean-Philippe, Patureau, Dominique, Jimenez, Julie
Format: Article en ligne
Langue:English
Publié: 2024
Accès à la collection:Waste management (New York, N.Y.)
Sujets:Journal Article Biogas effluent Food waste Land application Matter characterization Nutrient mineralization Organic fertilizer Soil Carbon 7440-44-0 plus... Nitrogen N762921K75
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100 1 |a Fernández-Domínguez, David  |e verfasserin  |4 aut 
245 1 0 |a Retention time and organic loading rate as anaerobic co-digestion key-factors for better digestate valorization practices  |b C and N dynamics in soils 
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520 |a The growing use of anaerobic co-digestion (AcoD) in processing organic waste has led to a significant digestate production. To effectively recycle digestate back into soils, it is crucial to understand how operational variables in the AcoD process influence the conversion of organic matter (OM). To address this, a combination of biochemical fractionation and various soil incubation tests were employed to assess the stability of OM in digestates generated from anaerobic continuous reactors fed with a food waste-hay mixture and operating at different hydraulic retention times (HRT) and organic loading rates (OLR). This study revealed that digester performance and operating parameters impacted carbon dynamics in soils. A decrease in the carbon mineralization in soils when increasing the HRT was reported (48 ± 4 % for 70 days compared to 59 ± 1 % for 42 days). Specific HRT and OLR values were found to be linked to carbon accessibility and complexity, confirming that longer HRT lead to higher OM removal and increased complexity in soluble OM, despite minor discrepancies in relative carbon distribution. Furthermore, comparable rates of nitrogen mineralization in soils were observed for all digestates, consistent with the accessibility of nitrogen from the particulate OM. Nevertheless, AcoD converted substrates with the potential to immobilize nitrogen in soils into fast-acting fertilizers. In summary, this study underscores the importance of controlling the AcoD performances to evaluate the suitability of digestates for sustainable agricultural practices 
650 4 |a Journal Article 
650 4 |a Biogas effluent 
650 4 |a Food waste 
650 4 |a Land application 
650 4 |a Matter characterization 
650 4 |a Nutrient mineralization 
650 4 |a Organic fertilizer 
650 7 |a Soil  |2 NLM 
650 7 |a Carbon  |2 NLM 
650 7 |a 7440-44-0  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Sourdon, Logan  |e verfasserin  |4 aut 
700 1 |a Pérémé, Margaud  |e verfasserin  |4 aut 
700 1 |a Guilayn, Felipe  |e verfasserin  |4 aut 
700 1 |a Steyer, Jean-Philippe  |e verfasserin  |4 aut 
700 1 |a Patureau, Dominique  |e verfasserin  |4 aut 
700 1 |a Jimenez, Julie  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Waste management (New York, N.Y.)  |d 1999  |g 181(2024) vom: 30. Mai, Seite 1-10  |w (DE-627)NLM098197061  |x 1879-2456  |7 nnas 
773 1 8 |g volume:181  |g year:2024  |g day:30  |g month:05  |g pages:1-10 
856 4 0 |u http://dx.doi.org/10.1016/j.wasman.2024.03.031  |3 Volltext 
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