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Microbial strategies for cellulase and xylanase production through solid-state fermentation of digestate from biowaste
Mejías, Laura (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Cerda Llanos, Alejandra Patricia (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)
Gea Leiva, Teresa (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)

Date: 2018
Abstract: Solid-state fermentation (SSF) is a promising technology for producing bioproducts from organic wastes. The objective of this study is to assess the feasibility of using digestate as substrate to produce hydrolytic enzymes, mainly cellulase and xylanase, by exploring three different inoculation strategies: (i) SSF with autochthonous microbiota; (ii) non-sterile SSF inoculated with Trichoderma reesei and (iii) sequential batch operation to select a specialized inoculum, testing two different residence times. Native microbial population did not show a significant cellulase production, suggesting the need for a specialized inoculum. The inoculation of Trichoderma reesei did not improve the enzymatic activity. On the other hand, inconsistent operation was achieved during sequential batch reactor in terms of specific oxygen uptake rate, temperature and enzymatic activity profile. Low cellulase and xylanase activities were attained and the main hypotheses are non-appropriate biomass selection and some degree of hydrolysis by non-targeted proteases produced during fermentation.
Note: Altres ajuts: Generalitat de Catalunya pre-doctoral grant (reference 2017 DI019)
Note: Número d'acord de subvenció EC/H2020/689229
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Cellulase ; Digestate ; Solid-state fermentation ; Specialized inoculum ; Xylanase
Published in: Sustainability, Vol. 10, issue 7 (Jul. 2018) , art. 2433, ISSN 2398-9629

DOI: 10.3390/su10072433


15 p, 1.9 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 2018-10-04, last modified 2019-01-24



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