Optimization of enzymatic hydrolysis and fermentation conditions for improved bioethanol production from potato peel residues - Université de Rennes Access content directly
Journal Articles Biotechnology Progress Year : 2017

Optimization of enzymatic hydrolysis and fermentation conditions for improved bioethanol production from potato peel residues

Abstract

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.
Fichier principal
Vignette du fichier
Ben Taher et al. - 2016 - Optimization of enzymatic hydrolysis and fermentat.pdf (3.64 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Comment : Accepted manuscript online: 20 December 2016
Loading...

Dates and versions

hal-01518035 , version 1 (19-05-2017)

Identifiers

Cite

Imen Ben Taher, Patrick Fickers, Sofien Chniti, Mnasser Hassouna. Optimization of enzymatic hydrolysis and fermentation conditions for improved bioethanol production from potato peel residues. Biotechnology Progress, 2017, 33 (2), pp.397-406. ⟨10.1002/btpr.2427⟩. ⟨hal-01518035⟩
224 View
587 Download

Altmetric

Share

Gmail Facebook X LinkedIn More