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کشاورزی::
مواد اولیه
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.
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).
Second-generation ethanol production from sugarcane bagasse is particularly influenced by the process energy consumption, since the feedstock (bagasse) is also used as fuel for the production of the energy required in the process.
The higher the energy consumption of pretreatment, hydrolysis and subsequent concentration and fermentation steps, the lower the amount of feedstock that will be available for second-generation ethanol (Dias et al. 2013).
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