Abstract

Furfural and 5-hydroxymethylfurfural (HMF) are degradation products of lignocellulose during pretreatment operations. Furfural compounds are a group of chemical compounds whose common thread is an aldehyde group attached to a furan ring, and they constitute a problem for the development of second-generation biofuels because they act as fermentation inhibitors of the lignocellulose hydrolysates. Up to date, very few bacteria have been described to be able to eliminate them. The objective of this work was to isolate and characterize bacterial strains able to use, as the sole carbon source, 5-(hydroxymethyl)-furfural (HMF) and furan derivatives.

Highlights

  • The production of biofuels from lignocellulosic residues constitutes a viable option for reducing the greenhouse effect and for providing an alternative to fossil fuels [1]

  • Furfural compounds are a group of chemical compounds whose common thread is an aldehyde group attached to a furan ring, and they constitute a problem for the development of second-generation biofuels because they act as fermentation inhibitors of the lignocellulose hydrolysates

  • Furfural compounds are a group of chemical compounds whose common thread is an aldehyde group attached to a furan ring, and they constitute a problem for the development of second-generation biofuels because they act as fermentation inhibitors of the lignocellulose hydrolysates [2]

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Summary

Introduction

The production of biofuels from lignocellulosic residues constitutes a viable option for reducing the greenhouse effect and for providing an alternative to fossil fuels [1]. Numerous by-products, including furan derivatives, weak acids, and phenolic compounds, are generated in the pretreatment step [1]. Some degradation products from lignocellulose pretreatment strongly inhibit the activities of cellulolytic enzymes and ethanol fermentation strains, for this reason the removal of the inhibitor compounds is very important for the biotransformation processes [3]. Furfural and 5-hydroxymethylfurfural (HMF) are among these degradation products of lignocellulose during [4]. Furfural compounds are a group of chemical compounds whose common thread is an aldehyde group attached to a furan ring, and they constitute a problem for the development of second-generation biofuels because they act as fermentation inhibitors of the lignocellulose hydrolysates [2]. Investigations on optimization of pretreatment process to minimize the formation of furfural and HMF are being addressed, this approach is non-optimal [5].

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