Brewer's spent grain (BSG), an abundantly available side-stream from the brewing industry, was treated to extract lipids, hydrolyse carbohydrates to monosaccharides, isolate protein and depolymerize lignin to produce fractions valuable to the food, feed, fuel, and chemical industries. Steam explosion and organosolv cooking were found to improve the enzymatic digestibility of BSG carbohydrates from 30% to over 80% hydrolysis yield. The solids loading during the hydrolysis was shown to affect the hydrolysis yield, but promising results were reached even at 20% dry matter content. The treatment of the lignin-rich fraction with oxidative enzymes was found to lead into polymerization reactions suggesting that it would beneficiary to use radical scavengers and continuously separate low molecular weight compounds from the reaction medium.
|Publication status||Published - 2014|
|MoE publication type||Not Eligible|
|Event||18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014 - Rimini, Italy|
Duration: 5 Nov 2014 → 8 Nov 2014
Conference number: 18
|Conference||18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014|
|Abbreviated title||Ecomondo 2014|
|Period||5/11/14 → 8/11/14|
- brewer's spent grain
- lignin depolymerization
Kemppainen, K., Rommi, K., Gasser, C., Mucha, M., & Corvini, P. (2014). Brewer's spent grain: Future biorefinery raw material. Paper presented at 18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014, Rimini, Italy.