The focus of the second-generation biochemical route is to produce fermentable sugars from lignocellulosic feedstock.
lignocellulosic feedstock, can only be properly fermented using different microorganisms.
A variety of biomass pretreatment technologies has been investigated; their main purpose is to modify or remove hemicellulose and/or lignin from the lignocellulosic matrix, further exposing cellulose ?
In this process, the lignocellulosic feedstock is submitted to steam treatment for a few minutes, followed by quick depressurization and cooling, during which hemicellulose is converted to pentoses (C5 sugars) through reactions catalyzed by acids released during pretreatment (autohydrolysis) or added to the reactor (Menon and Rao 2012; Pourbafrani et al. 2014).
Hemicellulose removal from the lignocellulosic feedstock signi?
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