Journal article
Yeast fermentation of carboxylic acids obtained from pyrolytic aqueous phases for lipid production
Bioresource technology, Vol.118, pp.177-186
08/2012
Handle:
https://hdl.handle.net/2376/117046
PMID: 22705522
Abstract
► A fractional condenser was used to separate pyrolytic aqueous phase and bio-oil. ► Model compounds representing C1–C4 pyrolytic molecules were fermented. ► The optimal acetate concentration for fermentation with C. curvatus was determined. ► A technology to produce lipid from the pyrolytic aqueous phase was proposed.
The presence of very reactive C1–C4 molecules adversely affects the quality bio-oils produced from the pyrolysis of lignocellulosic materials. In this paper a scheme to produce lipids with Cryptococcus curvatus from the carboxylic acids in the pyrolytic aqueous phase collected in fractional condensers is proposed. The capacities of three oleaginous yeasts C. curvatus, Rhodotorula glutinis, Lipomyces starkeyi to ferment acetate, formate, hydroxylacat-aldehyde, phenol and acetol were investigated. While acetate could be a good carbon source for lipid production, formate provides additional energy and contributes to yeast growth and lipid production as auxiliary energy resource. Acetol could slightly support yeast growth, but it inhibits lipid accumulation. Hydroxyacetaldehyde and phenols showed high yeast growth and lipid accumulation inhibition. A pyrolytic aqueous phase with 20g/L acetate was fermented with C. curvatus, after neutralization and detoxification to produce 6.9g/L dry biomass and 2.2g/L lipid.
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Details
- Title
- Yeast fermentation of carboxylic acids obtained from pyrolytic aqueous phases for lipid production
- Creators
- Jieni Lian - Biological Systems Engineering, Washington State University, WA 99164-6120, USAManuel Garcia-Perez - Biological Systems Engineering, Washington State University, WA 99164-6120, USARalph Coates - Amaron Energy, Salt Lake City, UT 84103, USAHongwei Wu - Fuels and Energy Tech. Institute, Curtin University, Box U1987, Perth WA 6845, AustraliaShulin Chen - Biological Systems Engineering, Washington State University, WA 99164-6120, USA
- Publication Details
- Bioresource technology, Vol.118, pp.177-186
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900582335801842
- Language
- English
- Resource Type
- Journal article