Fractionation of the main components of barley spent grains from a microbrewery

Sökning: L773:0576 9787 > Fractionation of th...

The chemical composition of barley spent grains generated in a microbrewery and their fractionation by acid hydrolysis and delignification were investigated. The material contained high amount of carbohydrates (60%), while its lignin content was lower than that reported for other sorts of barley spent grains. Different dilute-acid hydrolysis methods were evaluated for separating the main components of the spent grains, without affecting the sugars generated by starch hydrolysis. The utilization of a two-step dilute-acid hydrolysis approach allowed to hydrolyse starch in a first step, at 100 ºC, and hemicelluloses in a second step, at 121 ºC. Acetosolv and alkaline delignification were used for solubilising the lignin fraction. A higher lignin solubilisation (95% of the lignin contained in the raw material) was achieved after alkaline delignification, whereas only 34% of the initial lignin was removed by direct acetosolv. When the acetosolv treatment was combined with acid hydrolysis, lignin solubilisation increased to 74%. Lignin was precipitated from the liquors at recovery rates from 40 to 93%, as depending on the hydrolysis/delignification method used.

Lauceria, Jose L. (författare)
Rodriguez, Dani (författare)
Beaton, Milagros (författare)
Taherzadeh, Mohammad J.Högskolan i Borås,Institutionen Ingenjörshögskolan,Biotechnology(Swepub:hb)mjt (författare)
Martin, Carlos (författare)
Högskolan i BoråsInstitutionen Ingenjörshögskolan (creator_code:org_t)

Av författaren/redakt...: Dehnavi, Gholama ...; Lauceria, Jose L ...; Rodriguez, Dani; Beaton, Milagros; Taherzadeh, Moha ...; Martin, Carlos

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.