Construction and demolition lignocellulosic wastes to bioethanol
Journal article, 2011

This work deals with conversion of four construction and demolition (C&D) lignocellulosic wastes including OSB, chipboard, plywood, and wallpaper to ethanol by separate enzymatic hydrolysis and fermentation (SHF). Similar to other lignocelluloses, the wastes were resistant to the enzymatic hydrolysis, in which only up to 7% of their cellulose was hydrolyzed. Therefore, the lignocellulosic wastes were treated with phosphoric acid, sodium hydroxide, or N-methylmorpholine-N-oxide (NMMO), which resulted in improving the subsequent enzymatic hydrolysis to 38.2-94.6% of the theoretical yield. The best performance was obtained after pretreatment by concentrated phosphoric acid, followed by NMMO. The pretreated and hydrolyzed C&D wastes were then successfully fermented by baker's yeast to ethanol with 70.5-84.2% of the theoretical yields. The results indicate the possibility of producing 160 ml ethanol from each kg of the C&D wastes at the best conditions.

Pretreatment

Construction engineered wood waste

ethanol-production

NMMO

biogas production

saccharification

alkaline pretreatment

spruce

Wallpaper

Ethanol

Phosphoric acid

enhanced enzymatic-hydrolysis

cellulose

Author

V. Jafari

University of Borås

S. R. Labafzadeh

University of Borås

Azam Jeihanipour

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

K. Karimi

Isfahan University of Technology

University of Borås

Mohammad Taherzadeh Esfahani

University of Borås

Renewable Energy

0960-1481 (ISSN)

Vol. 36 11 2771-2775

Subject Categories

Industrial Biotechnology

DOI

10.1016/j.renene.2011.04.028

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3/8/2018 9