Pretreatments to enhance the digestibility of lignocellulosic biomass

Lignocellulosic biomass represents a rather unused source for biogas and ethanol production. Many factors, like lignin content, crystallinity of cellulose, and particle size, limit the digestibility of the hemicellulose and cellulose present in the lignocellulosic biomass. Pretreatments have as a go...

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Bibliographic Details
Published in:Bioresource technology 2009, Vol.100 (1), p.10-18
Main Authors: Hendriks, A.T.W.M., Zeeman, G.
Format: Article
Language:English
Subjects:
ammonia
Bacteria, Anaerobic - metabolism
biodegradability
Bioenergy
Biofuel production
biogas
Biological and medical sciences
biomass
bioreactors
Biotechnology
cellulose
chemical composition
chemical structure
chemical treatment
clostridium-thermocellum
corn stover
Digestibility
Energy
enzymatic-hydrolysis
Ethanol - chemistry
Ethanol - metabolism
ethanol production
ethanol-tolerant mutant
Fermentation
Fundamental and applied biological sciences. Psychology
heat treatment
hemicellulose
hot water treatment
Industrial applications and implications. Economical aspects
lignin
Lignin - chemistry
Lignin - metabolism
Lignocellulose
lignocellulosic wastes
lime pretreatment
liming materials
liquid hot-water
literature reviews
Methane - chemistry
Methane - metabolism
Methods. Procedures. Technologies
Microbial engineering. Fermentation and microbial culture technology
Pretreatment
steam-explosion pretreatment
steaming
wet oxidation pretreatment
wheat-straw
yellow-poplar sawdust
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Description
Summary:Lignocellulosic biomass represents a rather unused source for biogas and ethanol production. Many factors, like lignin content, crystallinity of cellulose, and particle size, limit the digestibility of the hemicellulose and cellulose present in the lignocellulosic biomass. Pretreatments have as a goal to improve the digestibility of the lignocellulosic biomass. Each pretreatment has its own effect(s) on the cellulose, hemicellulose and lignin; the three main components of lignocellulosic biomass. This paper reviews the different effect(s) of several pretreatments on the three main parts of the lignocellulosic biomass to improve its digestibility. Steam pretreatment, lime pretreatment, liquid hot water pretreatments and ammonia based pretreatments are concluded to be pretreatments with high potentials. The main effects are dissolving hemicellulose and alteration of lignin structure, providing an improved accessibility of the cellulose for hydrolytic enzymes.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2008.05.027