Brewer's spent grain: Future biorefinery raw material

Katariina Kemppainen, Katariina Rommi, C. Gasser, M. Mucha, P. Corvini

Research output: Contribution to conferenceConference articleProfessional

Abstract

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.
Original languageEnglish
Publication statusPublished - 2014
MoE publication typeNot Eligible
Event18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014 - Rimini, Italy
Duration: 5 Nov 20148 Nov 2014
Conference number: 18

Conference

Conference18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014
Abbreviated titleEcomondo 2014
CountryItaly
CityRimini
Period5/11/148/11/14

Fingerprint

spent grains
brewers grains
biorefining
raw materials
hydrolysis
lignin
carbohydrates
brewing industry
chemical industry
protein isolates
free radical scavengers
explosions
monosaccharides
enzymatic hydrolysis
dry matter content
polymerization
steam
cooking
molecular weight
extracts

Keywords

  • brewer's spent grain
  • fractionation
  • pretreatment
  • lignin depolymerization

Cite this

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.
Kemppainen, Katariina ; Rommi, Katariina ; Gasser, C. ; Mucha, M. ; Corvini, P. / 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.
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author = "Katariina Kemppainen and Katariina Rommi and C. Gasser and M. Mucha and P. Corvini",
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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, 5/11/14 - 8/11/14, .

Brewer's spent grain : Future biorefinery raw material. / Kemppainen, Katariina; Rommi, Katariina; Gasser, C.; Mucha, M.; Corvini, P.

2014. Paper presented at 18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014, Rimini, Italy.

Research output: Contribution to conferenceConference articleProfessional

TY - CONF

T1 - Brewer's spent grain

T2 - Future biorefinery raw material

AU - Kemppainen, Katariina

AU - Rommi, Katariina

AU - Gasser, C.

AU - Mucha, M.

AU - Corvini, P.

N1 - Project code: 77179

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - brewer's spent grain

KW - fractionation

KW - pretreatment

KW - lignin depolymerization

M3 - Conference article

ER -

Kemppainen K, Rommi K, Gasser C, Mucha M, Corvini P. Brewer's spent grain: Future biorefinery raw material. 2014. Paper presented at 18th International Trade Fair of Material and Energy Recovery and Sustainable Development, Ecomondo 2014, Rimini, Italy.