Article (Scientific journals)
Optimization of enzymatic hydrolysis and fermentation conditions for improved bioethanol production from potato peel residues
Ben Taher, I.; Fickers, Patrick; Chniti, S. et al.
2017In Biotechnology Progress, 33 (2), p. 397-406
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Keywords :
Aspergillus; Bioethanol; Enzymes; Ethanol; Fermentation; Hydrolysis; Sugars; Surface properties; Yeast; Bio-ethanol production; Fermentation conditions; Hydrothermal pretreatment; Optimized conditions; Potato peels; Pre-Treatment; Response surface methodology; Second generation bioethanol; Enzymatic hydrolysis; Aspergillus niger; Trichoderma; Biodegradation, Environmental; Coculture Techniques; Industrial Waste; Plant Extracts; Refuse Disposal; Solanum tuberosum
Abstract :
[en] The aim of this work was the optimization of the enzyme hydrolysis of potato peel residues (PPR) for bioethanol production. The process included a pretreatment step followed by an enzyme hydrolysis using crude enzyme system composed of cellulase, amylase and hemicellulase, produced by a mixed culture of Aspergillus niger and Trichoderma reesei. Hydrothermal, alkali and acid pretreatments were considered with regards to the enhancement of enzyme hydrolysis of potato peel residues. The obtained results showed that hydrothermal pretreatment lead to a higher enzyme hydrolysis yield compared to both acid and alkali pretreatments. Enzyme hydrolysis was also optimized for parameters such as temperature, pH, substrate loading and surfactant loading using a response surface methodology. Under optimized conditions, 77 g L−1 of reducing sugars were obtained. Yeast fermentation of the released reducing sugars led to an ethanol titer of 30 g L−1 after supplementation of the culture medium with ammonium sulfate. Moreover, a comparative study between acid and enzyme hydrolysis of potato peel residues was investigated. Results showed that enzyme hydrolysis offers higher yield of bioethanol production than acid hydrolysis. These results highlight the potential of second generation bioethanol production from potato peel residues treated with onsite produced hydrolytic enzymes. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:397–406, 2017. © 2017 American Institute of Chemical Engineers
Disciplines :
Biotechnology
Author, co-author :
Ben Taher, I.;  Unité de recherche Sciences des Aliments, Ecole Supérieure des Industries Alimentaires de Tunis, Av Alain Savary, 58, Tunis, Tunisia, Laboratoire de génies biologique et agroalimentaire, Université Libre de Tunis, Av Kheireddine Pacha, 30, Tunis, Tunisia
Fickers, Patrick ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Microbial, food and biobased technologies
Chniti, S.;  Université de Rennes 1, ENSCR, CNRS, UMR 6226, avenue du Général Leclerc, CS 50837, Rennes Cedex 7, France
Hassouna, M.;  Unité de recherche Sciences des Aliments, Ecole Supérieure des Industries Alimentaires de Tunis, Av Alain Savary, 58, Tunis, Tunisia
Language :
English
Title :
Optimization of enzymatic hydrolysis and fermentation conditions for improved bioethanol production from potato peel residues
Publication date :
2017
Journal title :
Biotechnology Progress
ISSN :
8756-7938
eISSN :
1520-6033
Publisher :
John Wiley and Sons Inc.
Volume :
33
Issue :
2
Pages :
397-406
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 18 February 2021

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