[en] A Box–Behnken experimental design and response surface methodology were employed to optimize the pretreatment parameters of a formic/acetic acid delignification treatment of Miscanthus ×giganteus for enzymatic hydrolysis. The effects of three independent variables, namely cooking time (1, 2 and 3 h), formic acid/acetic acid/water ratio (20/60/20, 30/50/20 and 40/40/20) and temperature (80, 90 and
107 ◦C) on pulp yield, residual Klason lignin content, concentration of degradation products (furfural and
hydroxymethylfurfural) in the black liquor, and enzymatic digestibility of the pulps were investigated. The major parameter influencing was the temperature for pulp yield, delignification degree, furfural production and enzymatic digestibility. According to the response surface analysis the optimum conditions predicted for a maximum enzymatic digestibility of the glucan (75.3%) would be obtained using a cooking time of 3 h, at 107 ◦C and with a formic acid/acetic acid/water ratio of 40/40/20%. Glucan digestibility was highly dependent on the delignification degree.
Disciplines :
Agriculture & agronomy
Author, co-author :
Vanderghem, Caroline ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Brostaux, Yves ; Université de Liège - ULiège > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie
Jacquet, Nicolas ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Blecker, Christophe ; Université de Liège - ULiège > Chimie et bio-industries > Technologie des industries agro-alimentaires
Paquot, Michel ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Language :
English
Title :
Optimization of formic/acetic acid delignification of Miscanthus ×giganteus for enzymatic hydrolysis using response surface methodology
Publication date :
2012
Journal title :
Industrial Crops and Products
ISSN :
0926-6690
eISSN :
1872-633X
Publisher :
Elsevier Science
Volume :
35
Pages :
280-286
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
TECHNOSE project number 716757; LIGNOFUEL project number 716721
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie
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