Document Detail


Biotechnological conversion of waste cooking olive oil into lipid-rich biomass using Aspergillus and Penicillium strains.
MedLine Citation:
PMID:  21281409     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Aims:  In this study we have investigated the biochemical behavior of Aspergillus sp. (5 strains) and Penicillium expansum (1 strain) fungi cultivated on waste cooking olive oil. The production of lipid-rich biomass was the main target of the work. In parallel, the biosynthesis of other extra-cellular metabolites (organic acids) and enzyme (lipase) and the substrate fatty acid specificity of the strains were studied. Methods and Results:  Carbon-limited cultures were performed on waste oil, added in the growth medium at 15 g l(-1) , and high biomass quantities were produced (up to ∼18 g l(-1) , conversion yield of ∼1 0 g of dry biomass formed per g of fat consumed or higher). Cellular lipids were accumulated in notable quantities in almost all cultures. Aspergillus sp. ATHUM 3482 accumulated lipid up to 64 0% (wt/wt) in dry fungal mass. In parallel, extra-cellular lipase activity was quantified and it was revealed to be strain and fermentation time dependent, with a maximum quantity of 645 U ml(-1) being obtained by A. niger NRRL 363. Storage lipid content significantly decreased at the stationary growth phase. Some differences in the fatty acid composition of both cellular and residual lipids as compared with the initial substrate fat used were observed; in various cases cellular lipids more saturated and enriched with arachidic acid were produced. Aspergillus strains produced oxalic acid up to 5 0 g l(-1) . Conclusions:  Aspergillus and Penicillium strains are able to convert waste cooking olive oil into high added value products. Significance and Impact of the Study:  Increasing fatty wastes amounts are annually produced. The current study provided an alternative way of bio-valorization of these materials, by using them as substrates, in order to produce added-value compounds.
Authors:
Seraphim Papanikolaou; Andreas Dimou; Stylianos Fakas; Panagiota Diamantopoulou; Antonios Philippoussis; Maria Galiotou-Panayotou; George Aggelis
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-31
Journal Detail:
Title:  Journal of applied microbiology     Volume:  -     ISSN:  1365-2672     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-2-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 The Society for Applied Microbiology.
Affiliation:
Department of Food Science and Technology, Agricultural University of Athens, Iera Odos 75, 11855 - Athens, Greece Unit of Microbiology, Department of Biology, Division of Genetics, Cell and Development Biology, University of Patras, 26504 - Patras, Greece National Agricultural Research Foundation, Institute of Agricultural Machinery and Constructions, Laboratory of Edible Fungi, 61 Dimocratias street, 13561 - Agii Anargyri, Athens, Greece.
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