Next Article in Journal
Synthesis of a Novel α-Glucosyl Ginsenoside F1 by Cyclodextrin Glucanotransferase and Its In Vitro Cosmetic Applications
Previous Article in Journal
Single Molecule FRET: A Powerful Tool to Study Intrinsically Disordered Proteins
Article Menu

Export Article

Open AccessArticle
Biomolecules 2018, 8(4), 141; https://doi.org/10.3390/biom8040141

Lignin Degradation Efficiency of Chemical Pre-Treatments on Banana Rachis Destined to Bioethanol Production

1
Department of Life Science and Biotechnology, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy
2
Laboratorio de Biotecnología, Universidad Poilitécnica Salesiana, Av. Isabel La Católica N 23-52 y Madrid, Quito-Ecuador 170109, Quito, Ecuador
*
Author to whom correspondence should be addressed.
Received: 28 August 2018 / Revised: 26 October 2018 / Accepted: 2 November 2018 / Published: 9 November 2018
Full-Text   |   PDF [2023 KB, uploaded 9 November 2018]   |  

Abstract

Valuable biomass conversion processes are highly dependent on the use of effective pretreatments for lignocellulose degradation and enzymes for saccharification. Among the nowadays available treatments, chemical delignification represents a promising alternative to physical-mechanical treatments. Banana is one of the most important fruit crops around the world. After harvesting, it generates large amounts of rachis, a lignocellulosic residue, that could be used for second generation ethanol production, via saccharification and fermentation. In the present study, eight chemical pretreatments for lignin degradation (organosolv based on organic solvents, sodium hypochlorite, hypochlorous acid, hydrogen peroxide, alkaline hydrogen peroxide, and some combinations thereof) have been tested on banana rachis and the effects evaluated in terms of lignin removal, material losses, and chemical composition of pretreated material. Pretreatment based on lignin oxidation have demonstrated to reach the highest delignification yield, also in terms of monosaccharides recovery. In fact, all the delignified samples were then saccharified with enzymes (cellulase and beta-glucosidase) and hydrolysis efficiency was evaluated in terms of final sugars recovery before fermentation. Analysis of Fourier transform infrared spectra (FTIR) has been carried out on treated samples, in order to better understand the structural effects of delignification on lignocellulose. Active chlorine oxidations, hypochlorous acid in particular, were the best effective for lignin removal obtaining in the meanwhile the most promising cellulose-to-glucose conversion. View Full-Text
Keywords: delignification; organosolv; oxidation; hypochlorous acid; rachis; lignocellulosic materials; Fourier transform infrared spectra delignification; organosolv; oxidation; hypochlorous acid; rachis; lignocellulosic materials; Fourier transform infrared spectra
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Costa, S.; Rugiero, I.; Larenas Uria, C.; Pedrini, P.; Tamburini, E. Lignin Degradation Efficiency of Chemical Pre-Treatments on Banana Rachis Destined to Bioethanol Production. Biomolecules 2018, 8, 141.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Biomolecules EISSN 2218-273X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top