Débutant 32++ Alkaline Pretreatment Of Lignocellulosic Biomass. Alkaline pretreatment is one of several chemical pretreatment technologies that has been intensively investigated. Lignocellulosic biomass is one of the most abundant organic resources worldwide and is a promising source of renewable energy and bioproducts. Lcbs are resistant to chemical and biological breakdown. The use of an alkali causes the degradation of ester and glycosidic side chains resulting in structural alteration of lignin, cellulose.