Enhanced direct fermentation from food waste to butanol and hydrogen by an amylolytic Clostridium

Chen Zhang, Tinggang Li, Guandong Su and Jianzhong He

Renewable Energy, 2020, vol. 153, issue C, 522-529

Abstract: This study developed a process using an amylolytic Clostridium sp. strain BOH3 to produce butanol and hydrogen from food waste without enzymatic pretreatment. Strain BOH3, which possesses genes encoding amylases, can produce 14.1 g/L butanol and 16.2 mmol hydrogen from 180 g/L food waste. Protein sequence analysis shows that the amylase in Clostridium sp. strain BOH3 may contain more active sites and possess a higher translation rate than that in Clostridium beijerinckii NCIMB 8052. After calcium was confirmed able to promote the activities of the amylase, the butanol production was improved to 16.6 g/L and the hydrogen production was increased to 18.2 mmol from 180 g/L food waste when external calcium ions were supplemented. Compared to a previous similar study (12.5 g/L), the butanol production is 1.3 - fold of that production. Butanol productivity was also enhanced to 0.17 g/L/h due to the shorter fermentation duration caused by enhanced amylase activities. Thus, Clostridium sp. strain BOH3 is a promising candidate for one-step butanol production using food waste to mitigate environmental sustainability issues.

Keywords: Butanol; Hydrogen; Food waste; Fermentation; Amylase; Clostridium (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:153:y:2020:i:c:p:522-529

DOI: 10.1016/j.renene.2020.01.151

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