Journal
CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
Volume 33, Issue 4, Pages 471-483Publisher
CROATIAN SOC CHEMICAL ENGINEERING TECHNOLOGY
DOI: 10.15255/CABEQ.2019.1738
Keywords
bioethanol; fruit and vegetable wastes; pretreatment; syngas fermentation; yeast fermentation
Funding
- TUBITAK-CAYDAG [118Y305]
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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.
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