Abstract:In this work different ways of optimally producing bioethanol at various pH with thermotolerant yeasts and their cocultures using a non-human edible starchy food as feedstock was examined. African wild cocoyam, Xanthosoma roseum, sourced from abandoned farmlands in Obukpa, Nsukka, Nigeria was used as the substrate, while strains of Kluyveromyces marxianus and Pichia stipitis were used to ferment them. First the tubers were gelatinized by boiling under pressure above 100oC before hydrolysis with concentrated H2… Show more
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