Next Article in Journal
Production and Quality Analysis of Wine from Honey and Coconut Milk Blend Using Saccharomyces cerevisiae
Next Article in Special Issue
Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review
Previous Article in Journal
Microbial Production of Malic Acid from Biofuel-Related Coproducts and Biomass
Previous Article in Special Issue
Anhydrous Ammonia Pretreatment of Corn Stover and Enzymatic Hydrolysis of Glucan from Pretreated Corn Stover
Article Menu

Export Article

Open AccessFeature PaperArticle
Fermentation 2017, 3(2), 15; doi:10.3390/fermentation3020015

A Sequential Steam Explosion and Reactive Extrusion Pretreatment for Lignocellulosic Biomass Conversion within a Fermentation-Based Biorefinery Perspective

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Department of Energy, Biofuels Unit, Avda. Complutense 40, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Thaddeus Ezeji
Received: 16 March 2017 / Revised: 12 April 2017 / Accepted: 14 April 2017 / Published: 20 April 2017
(This article belongs to the Special Issue Biofuels and Biochemicals Production)
View Full-Text   |   Download PDF [1523 KB, uploaded 20 April 2017]   |  

Abstract

The present work evaluates a two-step pretreatment process based on steam explosion and extrusion technologies for the optimal fractionation of lignocellulosic biomass. Two-step pretreatment of barley straw resulted in overall glucan, hemicellulose and lignin recovery yields of 84%, 91% and 87%, respectively. Precipitation of the collected lignin-rich liquid fraction yielded a solid residue with high lignin content, offering possibilities for subsequent applications. Moreover, hydrolysability tests showed almost complete saccharification of the pretreated solid residue, which when combined with the low concentration of the generated inhibitory compounds, is representative of a good pretreatment approach. Scheffersomyces stipitis was capable of fermenting all of the glucose and xylose from the non-diluted hemicellulose fraction, resulting in an ethanol concentration of 17.5 g/L with 0.34 g/g yields. Similarly, Saccharomyces cerevisiae produced about 4% (v/v) ethanol concentration with 0.40 g/g yields, during simultaneous saccharification and fermentation (SSF) of the two-step pretreated solid residue at 10% (w/w) consistency. These results increased the overall conversion yields from a one-step steam explosion pretreatment by 1.4-fold, showing the effectiveness of including an extrusion step to enhance overall biomass fractionation and carbohydrates conversion via microbial fermentation processes. View Full-Text
Keywords: lignocellulosic biomass; steam explosion; extrusion; Scheffersomyces stipitis; Saccharomyces cerevisiae; simultaneous saccharification and fermentation lignocellulosic biomass; steam explosion; extrusion; Scheffersomyces stipitis; Saccharomyces cerevisiae; simultaneous saccharification and fermentation
Figures

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 alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Oliva, J.M.; Negro, M.J.; Manzanares, P.; Ballesteros, I.; Chamorro, M.Á.; Sáez, F.; Ballesteros, M.; Moreno, A.D. A Sequential Steam Explosion and Reactive Extrusion Pretreatment for Lignocellulosic Biomass Conversion within a Fermentation-Based Biorefinery Perspective. Fermentation 2017, 3, 15.

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]
Fermentation EISSN 2311-5637 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top