Removal of Furfurals (Inhibitory By-Products After Biomass Acid Pretreatment) by Activated BiocharDecember 16, 2011
Acid treatment is a common and non-expensive method for the pretreatment of lignocellulosic biomass for biofuel ethanol production. One of the possible effects of acid pretreatment, however, is the formation of compounds which might be inhibitory to ethanol fermenting microorganisms. The dehydration of hexose and pentose sugars in the biomass after acid pretreatment can lead to the formation of a class of inhibitory compounds called, furans: (1) furfural from dehydration of pentose sugars, and (2) hydroxymethyl furfural (HMF) from dehydration of hexose sugars. Further degradation of furfurals may produce organic acids, which are also known to inhibit ethanol fermentation.
Researchers from the Southern Regional Research Center of the United States Department of Agriculture (USDA), Agricultural Research Service (ARS) report the removal of furans through the use of ‘activated biochar". The activated biochar was obtained from the pyrolysis (air-free heating) and subsequent chemical activation of agricultural residues, such as cotton seed hull, flax shive and cotton gin waste. The chars were tested on model solutions containing furural and HMF.
Results showed that phosphoric-acid-activated biochars and steam-activated biochars from cotton/linen production residues could adsorb furfural and HMF, with steam-activated biochars giving the best results. The addition of 2.5% biochar to a sugar solution containing 1 g per liter of either furfural of HMF, could achieve a 99% furan removal efficiency. The full paper is published in the journal, Bioresources (URL above).
The Crop Biotech Update is a weekly newsletter of ISAAA, a non-for-profit organization. The CBU is distributed for free to over 23,000 subscribers worldwide to inform them about the key developments in biosciences, especially in agricultural biotechnology. Your support will help us in our mission to feed the world with knowledge. You can help by donating as little as $10.
See more articles:
News from Around the World
- Health Impact Assessment of GM Crops Shows No Health Hazards
- FAO Report: The State of Land and Water Resources
- Major Gains in Efficiency of Livestock Systems Needed
- Bt Cotton Study Tour in Burkina Faso by Stakeholders from Eastern and Southern Africa
- New Vitamin A-fortified Cassava Released in Nigeria
- Science Reporting Workshop on Biotech and Biosafety
- Scientists Search for Virus Resistant Cassava
- Africa-wide Task Forces to Accelerate Delivery of Rice Technologies
- Economist: Biotechnology Could Contribute to Field Crop Yield Trends
- Study Aimed for Drought-Stress Resistant Wheat
- Key Plant Immune Response in Fight Against Bacteria
- Argenbio: Argentina Benefits from Biotech Crops
- Purdue and USDA Scientists Find a Way to Stop Hessian Fly Attacks
- Researchers Investigate Genes in Medicinal Plants
- Resequencing 50 Accessions of Cultivated and Wild Rice to Hasten Rice Improvement
- Insight Could Help Develop New Crops
- Hormones in High Soil Temperatures Affects Seed Dormancy
- Biotech Mulberry Expressing Barley Gene Displays Enhanced Stress Tolerance
- Use of Neomycin Phosphotransferase Gene as Marker in Cassava Transformation
- Scientists Use Wild Potatoes as Source of Potato Virus Y Resistance
Beyond Crop Biotech
- Tiny Protein Helps Bacteria ‘Talk' and Triggers Defensive Response in Plants
- Developments on Retina Implant Research in Europe and the U.S.
- Scientists Develop New Research Tool on Cell Mechanics
- Breeding with Molecular Markers – February 2012
- Conference on Agribiotechnology
- International Conference on Plant Biotech for Food Security: New Frontiers
- International Conference on Advances in Biotech 2012
Subscribe to CBU: