期刊
JOULE
卷 2, 期 2, 页码 280-295出版社
CELL PRESS
DOI: 10.1016/j.joule.2017.11.008
关键词
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资金
- Alexander von Humboldt Foundation
- New York State Department of Environmental Conservation [C009762]
- Cornell University Agricultural Experiment Station federal formula funds [1007200]
- USDA National Institute of Food and Agriculture
- National Science Foundation Graduate Research Fellowship [DGE-1144153, DGE-1650441]
Acid whey is a Greek-yogurt waste stream and can be a resource to produce biofuel precursors. Our objective was to convert acid whey into medium-chain carboxylic acid (MCCA) oil with the open-culture carboxylate platform. Here, we developed a temperature-phased bioprocess with different anaerobic reactor microbiomes, performing thermophilic lactic acid production and mesophilic chain elongation, to produce MCCAs (C6-C9) from acid whey via lactic acid as an intermediate. For the lactic acid-producing bioreactor, we achieved a volumetric lactic acid production rate of 1,230 mmol C L-1 day(-1) (1.54 g L-1 hr(-1)). For the chain-elongating bioreactor, we achieved a volumetric MCCA production rate of 111 mmol C L-1 day(-1) and a volumetric n-caproic acid (C6) production rate of 81 mmol C L-1 day(-1) (0.07 g L-1 hr(-1)). We converted a real waste stream into mainly MCCAs without the external addition of an electron donor.
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