By-products resulting from lignocellulose pretreatment and their inhibitory effect on fermentations for (bio)chemicals and fuels

E.C. van der Pol, R.R. Bakker, P. Baets, G. Eggink

Research output: Contribution to journalArticleAcademicpeer-review

85 Citations (Scopus)

Abstract

Lignocellulose might become an important feedstock for the future development of the biobased economy. Although up to 75 % of the lignocellulose dry weight consists of sugar, it is present in a polymerized state and cannot be used directly in most fermentation processes for the production of chemicals and fuels. Several methods have been developed to depolymerize the sugars present in lignocellulose, making the sugars available for fermentation. In this review, we describe five different pretreatment methods and their effect on the sugar and non-sugar fraction of lignocellulose. For several pretreatment methods and different types of lignocellulosic biomass, an overview is given of by-products formed. Most unwanted by-products present after pretreatment are dehydrated sugar monomers (furans), degraded lignin polymers (phenols) and small organic acids. Qualitative and quantitative effects of these by-products on fermentation processes have been studied. We conclude this review by giving an overview of techniques and methods to decrease inhibitory effects of unwanted by-products.
Original languageEnglish
Pages (from-to)9579-9593
JournalApplied Microbiology and Biotechnology
Volume98
Issue number23
DOIs
Publication statusPublished - 2014

Keywords

  • dilute-acid hydrolysis
  • steam-explosion pretreatment
  • fiber expansion afex
  • saccharomyces-cerevisiae
  • degradation-products
  • escherichia-coli
  • ethanol fermentation
  • wheat-straw
  • sugarcane bagasse
  • wet oxidation

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