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Journal article

Integrated production of cellulosic bioethanol and succinic acid from rapeseed straw after dilute-acid pretreatment

By Kuglarz, Mariusz1; Alvarado-Morales, Merlin2,3; Dąbkowska, Katarzyna4; Angelidaki, Irini2,3

From

University of Bielsko-Biala1

Department of Environmental Engineering, Technical University of Denmark2

Residual Resource Engineering, Department of Environmental Engineering, Technical University of Denmark3

Warsaw University of Technology4

The aim of this study was to develop an integrated biofuel (cellulosic bioethanol) and biochemical (succinic acid) production process from rapeseed straw after dilute-acid pretreatment. Rapeseed straw pretreatment at 20% (w/v) solid loading and subsequent hydrolysis with Cellic® CTec2 resulted in high glucose yield (80%) and ethanol output (122-125 kg of EtOH/Mg of rapeseed straw).

Supplementation the enzymatic process with 10% dosage of endoxylanases (Cellic® HTec2) reduced the hydrolysis time required to achieve the maximum glucan conversion by 44-46% and increased the xylose yield by 10% compared to the process with Cellic® CTec2. Significantly higher amounts of succinic acid were produced after fermentation of pretreatment liquor (48 kg/Mg of rapeseed straw, succinic acid yield: 60%) compared to fermentation of xylose-rich residue after ethanol production (35-37 kg/Mg of rapeseed straw, succinic yield: 68-71%).

Results obtained in this study clearly proved the biorefinery potential of rapeseed straw.

Language: English
Year: 2018
Pages: 191-199
ISSN: 18732976 and 09608524
Types: Journal article
DOI: 10.1016/j.biortech.2018.05.099
ORCIDs: Alvarado-Morales, Merlin and Angelidaki, Irini
Keywords

Cellic® CTec2 Cellulosic bioethanol Dilute-acid pretreatment Straw Succinic acid

Other keywords

Biofuels Brassica rapa Ethanol Fermentation Hydrolysis Succinic Acid

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