Please use this identifier to cite or link to this item:
Title: Organic matter transformation and detoxification in dry olive mill residue by the saprophytic fungus Paecilomyces farinosus
Authors: Sampedro, Inmaculada 
Cajthaml, Tomáš
Marinari, Sara
Petruccioli, Maurizio
Grego, Stefano
D'Annibale, Alessandro
Keywords: Dry olive mill residue;Phytotoxicity;Phenols;Paecilomyces farinosus;Humification;Laccase
Issue Date: 2011
Publisher: Elsevier Science
Source: Sampedro, I. et al. 2011. Organic matter transformation and detoxification in dry olive mill residue by the saprophytic fungus Paecilomyces farinosus. "Process Biochemistry" 44(2): 216-225.
Dry olive mill residue (DOR), the by-product of the two-phase extraction process, is very rich in organic matter and nutritionally relevant cations. For this reason, the agronomic use of this waste has been suggested although DOR exhibits significant phytotoxicity. The objective of this study was to investigate the impact of Paecilomyces farinosus on both organic matter modification and detoxification of this waste.Humification ratio in DOR colonized by the fungus for 20 weeks was increased by about 65% with respect to the abiotic control and humification index reached 0.38, a value that characterizes well-humified materials. High performance size-exclusion chromatography of humic acids from fungal cultures showed a marked increase in both weight-averaged and number-averaged molecular weights with respect to abiotic controls. Water-soluble phenols were reduced by 45% in 20-week-old P. farinosus cultures on DOR and mass-balance ultra-filtration showed that the relative abundance of the molecular weight fraction of phenols above 30 kDa increased from 31 to 72% suggesting the occurrence of polymerization.Experiments performed with alfalfa grown on soils containing 2.5% (w/w) of abiotic controls and fungaltreated DOR showed that phytotoxicity was totally suppressed in the waste that underwent fungal treatment.
L'articolo è disponibile sul sito dell'editore:
ISSN: 1359-5113
DOI: 10.1016/j.procbio.2008.10.016
Appears in Collections:DABAC - Archivio della produzione scientifica

Files in This Item:
File Description SizeFormat
Proc_bio_2009.pdf120.02 kBAdobe PDFView/Open
Show full item record

Citations 5

Last Week
Last month
checked on Feb 23, 2022

Page view(s)

Last Week
Last month
checked on Jul 13, 2024


checked on Jul 13, 2024

Google ScholarTM



All documents in the "Unitus Open Access" community are published as open access.
All documents in the community "Prodotti della Ricerca" are restricted access unless otherwise indicated for specific documents