Journal
BIORESOURCE TECHNOLOGY
Volume 218, Issue -, Pages 1140-1150Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.07.067
Keywords
Odd-carbon-number carboxylates; n-Caproate; n-Caprylate; n-Heptanoate; Medium-chain carboxylic acids (MCCAs)
Funding
- 973 Program [2012CB719801]
- National Natural Science Foundation of China [51378375, 51178327, 21177096]
- Fundamental Research Funds for Central Universities [0400219341]
- Collaborative Innovation Center for Regional Environmental Quality
Ask authors/readers for more resources
The objective of the study was to investigate whether the ratio of ethanol to acetate affects yield and product structure in chain elongation initiated by unacclimatized mixed cultures. The effect of varying the substrate concentration, while maintaining the same ratio of alcohol to acid, was also investigated. With a high substrate concentration, an alcohol to acid ratio >2:1 provided sufficient electron donor capacity for the chain elongation reaction. With an ethanol to acetate ratio of 3:1 (300 mM total carbon), the highest n-caproate concentration (3033 +/- 98 mg/L) was achieved during the stable phase of the reaction. A lower substrate concentration (150 mM total carbon) gave a lower yield of products and led to reduced carbon transformation efficiency compared with other reaction conditions. The use of unacclimatized inoculum in chain elongation can produce significant amounts of odd-carbon-number carboxylates as a result of protein hydrolysis. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available