| Literature DB >> 28605728 |
Yanan Yin1, Yifeng Zhang2, Dimitar Borisov Karakashev3, Jianlong Wang1, Irini Angelidaki3.
Abstract
Caproate is a valuable industrial product and chemical precursor. In this study, batch tests were conducted to investigate the fermentative caproate production through chain elongation from acetate and ethanol. The effect of acetate/ethanol ratio and initial ethanol concentration on caproate production was examined. When substrate concentration was controlled at 100mM total carbon, hydrogen was used as an additional electron donor. The highest caproate concentration of 3.11g/L was obtained at an ethanol/acetate ratio of 7:3. No additional electron donor was needed upon an ethanol/acetate ratio ≥7:3. Caproate production increased with the increase of carbon source until ethanol concentration over 700mM, which inhibited the fermentation process. The highest caproate concentration of 8.42g/L was achieved from high ethanol strength wastewater with an ethanol/acetate ratio of 10:1 (550mM total carbon). Results obtained in this study can pave the way towards efficient chain elongation from ethanol-rich wastewater.Entities:
Keywords: Chain elongation; Clostridium kluyveri; Ethanol/acetate ratio; Fermentation; n-Caproate
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Year: 2017 PMID： 28605728 DOI： 10.1016/j.biortech.2017.05.184
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642