Pretreatment of lignocellulosic wastes to improve ethanol and biogas production: A review

Pretreatment of lignocellulosic wastes to improve ethanol and biogas production : A review

Lignocelluloses are often a major or sometimes the sole components of different waste streams from various industries, forestry, agriculture and municipalities. Hydrolysis of these materials is the first step for either digestion to biogas (methane) or fermentation to ethanol. However, enzymatic hydrolysis of lignocelluloses with no pretreatment is usually not so effective because of high stability of the materials to enzymatic or bacterial attacks. The present work is dedicated to reviewing the methods that have been studied for pretreatment of lignocellulosic wastes for conversion to ethanol or biogas. Effective parameters in pretreatment of lignocelluloses, such as crystallinity, accessible surface area, and protection by lignin and hemicellulose are described first. Then, several pretreatment methods are discussed and their effects on improvement in ethanol and/or biogas production are described. They include milling, irradiation, microwave, steam explosion, ammonia fiber explosion (AFEX), supercritical CO2 and its explosion, alkaline hydrolysis, liquid hot-water pretreatment, organosolv processes, wet oxidation, ozonolysis, dilute- and concentrated-acid hydrolyses, and biological pretreatments.

TEKNIK OCH TEKNOLOGIER Industriell bioteknik Annan industriell bioteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Other Industrial Biotechnology hsv//eng
chitin
glucosamine
ethanol
biomass
biogas
lignocelluloses
baker's yeast
saccharomyces
cerevisiae
encapsulation
flocculation
superabsorbents
chitosan
zygomycetes
mucor
rhizopus
rhizomucor
MTBE
biopolymers
furfural
acetic acid
HMF
fed-batch
continuous cultivation
immobilization
denitrification
activated sludge
bread
orange peels
citrus
waste
keratin
methyl tertiary butyl ether
superabsorbents
chitosan
Energi och material

Karimi, K.Högskolan i Borås,Institutionen Ingenjörshögskolan(Swepub:hb)kei (författare)
Högskolan i BoråsInstitutionen Ingenjörshögskolan (creator_code:org_t)

Ingår i:International Journal of Molecular Sciences: Molecular Diversity Preservation International (MDPI) AG.9:9, s. 1621-16511661-65961422-0067

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