Open AccessComparison of Conventional and Novel Pre-treatment Methods for Bioethanol Production from Fruit and Vegetable Wastes
Author(s) -
Tugba Keskin-Gundogdu
Publication year - 2020
Publication title -
chemical and biochemical engineering quarterly/chemical and biochemical engineering quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.334
H-Index - 40
eISSN - 1846-5153
pISSN - 0352-9568
DOI - 10.15255/cabeq.2019.1738
Subject(s) - biofuel , fermentation , ethanol fuel , pulp and paper industry , syngas , biochar , chemistry , waste management , yeast , food science , ethanol fermentation , bioenergy , ethanol , environmentally friendly , microbiology and biotechnology , environmental science , biochemistry , pyrolysis , organic chemistry , engineering , catalysis , biology , ecology
In this study, novel and conventional techniques for the production of bioethanol from fruit and vegetable wastes (FVWs) by yeast and bacterial fermentation were investigated experimentally. Different pretreatment techniques (acid, heat, acid/heat, and microwave) for yeast fermentation were compared. Maximum ethanol concentrations of 11.7 and 11.8 g L–1 were observed from acid/heat and microwave pretreatment, respectively, by using Saccharomyces cerevisiae. On the other hand, biochar production from FVWs and syngas fermentation from the waste gas of this process were integrated. From waste gas with 12 % CO content, 5.5 g L–1 and 2.5 g L–1 ethanol production was observed by using anaerobic mixed culture and Clostridium ljungdahlii, respectively. The overall results emphasize the potential of bioethanol production from FVWs by economically feasible and environmentally friendly methods.