Liquor re-use strategy in lignocellulosic biomass fractionation with ethanol-water mixtures
- Resource Type
- Authors
- Felix Garcia-Ochoa; Miguel Ladero; Priscilla Vergara; Soledad Gutiérrez; Juan C. Villar
- Source
- Bioresource Technology. 280:396-403
- Subject
- 0106 biological sciences
Environmental Engineering
Lignocellulosic biomass
Bioengineering
Fractionation
Chemical Fractionation
010501 environmental sciences
Lignin
01 natural sciences
Hydrolysate
chemistry.chemical_compound
Acetic acid
010608 biotechnology
Enzymatic hydrolysis
Biomass
Cellulose
Waste Management and Disposal
Acetic Acid
0105 earth and related environmental sciences
Ethanol
Renewable Energy, Sustainability and the Environment
Chemistry
Alcoholic Beverages
Hydrolysis
Water
food and beverages
General Medicine
equipment and supplies
Pulp and paper industry
Glucose
Yield (chemistry)
- Language
- ISSN
- 0960-8524
Liquor recycle in lignocellulosic biomass fractionation with ethanol-water has been studied. Runs have been carried out in a 6 L tank reactor with liquor recirculation. The liquors obtained in six successive fractioning operations have been analyzed together with the solid phase remnant. Experimental results revealed that the number of re-uses reduces solids recovery (from 52.2 to 42.6%) and cellulose recovery (from 28.1 to 23.3%) with minor or no effect on the hemicelluloses and lignin removal. The more remarkable effect is an increase of the glucose yield (from 76.7 to 95.3% after enzymatic hydrolysis during 72 h). The accumulation of acetic acid in the spent liquors (until 1.3 g/L) seems to be responsible of the higher enzymatic hydrolysis yield, from 76.3 (first use) to 87.7% (fifth re-use). Liquor re-use is effective to improve the sustainability of the pre-treatment obtaining a cellulose-rich solid easy to hydrolysate to sugars reducing energy consumption.