Abstract
BACKGROUND: Pretreatment methods used to break down lignocellulose structure lead to the generation of compounds that inhibit ethanol fermentation. Hence, removal of these compounds is essential for improved fermentability. The surfactant-based cloud point extraction (CPE) aqueous two phase system is a new method having the potential for separation and recovery of inhibitors. The present work examines the potential of surfactants-based CPE systems as a detoxification method. RESULTS: Surfactants L62D and L62LF achieved more than 90% removal of phenolic compounds and less than 20% removal of acetic acid and HMF from a model system when the surfactant concentration was 1% and 5%. With untreated simulated hydrolysate containing inhibitors the fermentation was inhibited completely. Detoxification of the same hydrolysate with L62D (1% and 5%) and L62LF (1% and 5%) showed complete fermentation with high ethanol productivity (0.61gL-1h-1). Similarly, the detoxified corn stover hydrolysate showed delayed fermentation. The productivity increased by 30% after detoxification with 1% of the two surfactants and by 100% with 5% of the surfactants (L62D and L62LF). CONCLUSION: The new surfactant-based detoxification method significantly improved the fermentability of simulated hydrolysate and corn stover hydrolysate.
Original language | English (US) |
---|---|
Pages (from-to) | 1744-1749 |
Number of pages | 6 |
Journal | Journal of Chemical Technology and Biotechnology |
Volume | 88 |
Issue number | 9 |
DOIs | |
State | Published - Sep 1 2013 |
Keywords
- Corn stover
- Detoxification
- Ethanol
- Surfactant
ASJC Scopus subject areas
- Biotechnology
- Chemical Engineering(all)
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Waste Management and Disposal
- Pollution
- Organic Chemistry
- Inorganic Chemistry