Monitoring organic matter transformation of olive oil production residues in a full-scale composting plant by fluorescence spectroscopy

P. Rueda, Marta; Domínguez-Vidal, Ana; Llorent-Martínez, Eulogio J.; Aranda, Víctor; Ayora-Cañada, María José

Monitoring organic matter transformation of olive oil production residues in a full-scale composting plant by fluorescence spectroscopy

dc.contributor.author	P. Rueda, Marta
dc.contributor.author	Domínguez-Vidal, Ana
dc.contributor.author	Llorent-Martínez, Eulogio J.
dc.contributor.author	Aranda, Víctor
dc.contributor.author	Ayora-Cañada, María José
dc.date.accessioned	2024-10-22T07:17:20Z
dc.date.available	2024-10-22T07:17:20Z
dc.date.issued	2024-08
dc.description.sponsorship	Composting wet olive mill pomace, the main by-product of two-phase centrifugation systems, is an attractive valorization strategy in the context of regenerative agriculture. A comprehensive study of the changes in fluorescence signatures during the co-composting of this residue with olive tree pruning wastes and animal manure in a full-scale composting plant was performed. This compost showed more complex features than others at the initial stages of the process, exhibiting a singular band in the synchronous spectrum (500 nm) here attributed to polyphenol-pectin interactions. PARAFAC-derived components from Excitation-Emission matrices (EEMs) of water extracts were compared with those of fractions isolated following alkaline extraction at different maturity stages. The increase with composting of the component associated with humic-like substances (Ex 225, 365 nm/Em 476 nm) was more marked in the isolated humic acid fraction than in water extracts. Thus, the predominance of fulvic-like substances in water extracts explains inconsistencies previously reported about the relevance of the humic-like component during the composting process and the extent of humification. Finally, the correlation between PARAFAC components and several compost maturity parameters was studied. The negative correlation between the protein-like component and the germination index was explained by the protein-polyphenol interactions reflected in the emission spectra of this component. A strong positive correlation between both fulvic and humic fluorescent components and cation exchange capacity was found. In general, mature compost showed C/N ≤ 20 and no phytotoxicity (GI around 60%) although differences related to the heterogeneity of the large composting pile were important.	es_ES
dc.identifier.citation	Environmental Technology & Innovation, 2024; 35: 103695	es_ES
dc.identifier.issn	2352-1864	es_ES
dc.identifier.other	10.1016/j.eti.2024.103695	es_ES
dc.identifier.uri	https://hdl.handle.net/10953/3309
dc.language.iso	eng	es_ES
dc.publisher	Elsevier	es_ES
dc.relation.ispartof	Environmental Technology & Innovation, 2024; 35: 103695	es_ES
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 España	*
dc.rights.accessRights	info:eu-repo/semantics/openAccess	es_ES
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/es/	*
dc.subject	Olive mill pomace	es_ES
dc.subject	Compost maturity	es_ES
dc.subject	Dissolved organic matter	es_ES
dc.subject	Humification	es_ES
dc.subject	Fluorescence spectroscopy	es_ES
dc.subject	PARAFAC	es_ES
dc.title	Monitoring organic matter transformation of olive oil production residues in a full-scale composting plant by fluorescence spectroscopy	es_ES
dc.type	info:eu-repo/semantics/article	es_ES
dc.type.version	info:eu-repo/semantics/publishedVersion	es_ES