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Valorization of sugarcane bagasse and sugar beet molasses using Kluyveromyces marxianus for producing value-added aroma compounds via solid-state fermentation
Martínez Avila, Oscar Mauricio (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sánchez Ferrer, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Barrena Gómez, Raquel (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date: 2017
Abstract: The growing demand for natural products has favored the development of bioprocesses for obtaining value-added products in the fragrance and flavor sector. Solid-state fermentation (SSF) of agro-industrial residues together with generally recognized as safe (GRAS) strains like Kluyveromyces marxianus appears as a remarkable alternative for producing aroma compounds. In this study, a continuous air supplied system was used for optimizing the production of fruit-like compounds via SSF of a mixture of sugarcane bagasse/sugar beet molasses employing K. marxianus. The main operational parameters were evaluated to identify the best conditions for their biosynthesis. Maximum cumulative volatile production was achieved at 40 °C, 35% molasses (dry basis) and specific air flow rate (SAFR) 0. 14 L h⁻¹g⁻¹ITS reaching 161 mgTVOL per gram of initial total solids content (ITS). The main components of the produced volatiles were alcohols (43%) while ester species constituted only 18%. Selectivity to ester species was enhanced working at 30 °C, 25% molasses and SAFR 0. 11 L h⁻¹g−1ITS, maximizing the ester content to 47. 6 mgEster g⁻¹ITS. In this case, a pleasant fruity odor was perceived thanks to the higher ester content (35%). Stressing conditions for K. marxianus like high temperatures and limiting nitrogen availability seem to be key factors for promoting the production of the volatile compounds.
Note: Número d'acord de subvenció MINECO/CTM2015-69513-R
Note: Número d'acord de subvenció AGAUR/TECSPR15-1-0051
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Language: Anglès.
Document: article ; recerca ; submittedVersion
Subject: Solid-state fermentation ; Kluyveromyces marxianus ; Sugarcane bagasse ; Fruit-like compounds ; Agro-industrial residues
Published in: Journal of cleaner production, Vol. 158 (Aug. 2017) , p. 8-17, ISSN 0959-6526

DOI: 10.1016/j.jclepro.2017.04.155


Preprint
40 p, 1.4 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Engineering > Composting Research Group (GICOM)
Articles > Research articles
Articles > Published articles

 Record created 2018-10-03, last modified 2018-11-01



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