Aqueous ammonia pretreatment of oil palm empty fruit bunches for ethanol production

Published Date
October 2011, Vol.102(20):9806–9809, doi:10.1016/j.biortech.2011.07.050

Short Communication

Author 

Young Hoon Jung ^a

In Jung Kim ^a

Jong-In Han ^b

In-Geol Choi ^a

Kyoung Heon Kim ^a,,

aSchool of Life Sciences and Biotechnology, Korea University, Seoul 136-713, Republic of Korea

bDepartment of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea

Received 13 May 2011. Revised 12 July 2011. Accepted 15 July 2011. Available online 22 July 2011.

Abstract

Oil palm empty fruit bunches (EFB) were pretreated by aqueous ammonia soaking for ethanol production. Pretreated EFB, which were pretreated at the optimal conditions of 60 °C, 12 h, and 21% (w/w) aqueous ammonia, showed 19.5% and 41.4% glucose yields during an enzymatic digestibility test for 96 h when using 15 and 60 FPU of cellulase, respectively. Using the pretreated EFB, simultaneous saccharification and fermentation for 168 h with 5% (w/v) glucan loading and 60 FPU of cellulase and 30 CBU of β-glucosidase per gram glucan resulted in ethanol production of 18.6 g/L titer, 65.6% of theoretical maximum yield, and 0.11 g/L/h of productivity.

Keywords

Oil palm empty fruit bunches

Aqueous ammonia pretreatment

Ethanol

Lignocelluloses

Biomass

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