Journal article
Ethanol production from cotton gin trash using optimised dilute acid pretreatment and whole slurry fermentation processes
Bioresource Technology, Vol.173, pp.42-51
01/12/2014
PMID: 25280112
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Abstract
Cotton ginning trash (CGT) collected from Australian cotton gins was evaluated for bioethanol production. CGT composition varied between ginning operations and contained high levels of extractives (26-28%), acid-insoluble material (17-22%) and holocellulose (42-50%). Pretreatment conditions of time (4-20 min), temperature (160-220 degrees C) and sulfuric acid concentration (0-2%) were optimised using a central composite design. Response surface modelling revealed that CGT fibre pretreated at 180 degrees C in 0.8% H2SO4 for 12 min was optimal for maximising enzymatic glucose recoveries and achieved yields of 89% theoretical, whilst the total accumulated levels of furans and acetic acid remained relatively low at <1 and 2 g/L respectively. Response surface modelling also estimated maximum xylose recovery in pretreated liquors (87% theoretical) under the set conditions of 150 degrees C in 1.9% H2SO4 for 23.8 min. Yeast fermentations yielded high ethanol titres of 85%, 88% and 70% theoretical from glucose generated from: (a) enzymatic hydrolysis of washed pretreated fibres, (b) enzymatic hydrolysis of whole pretreated slurries and (c) simultaneous saccharification fermentations, respectively. Crown Copyright
Details
- Title
- Ethanol production from cotton gin trash using optimised dilute acid pretreatment and whole slurry fermentation processes
- Creators
- S McIntosh - NSW Department of Primary IndustriesT Vancov - NSW Department of Primary IndustriesJ Palmer - NSW Department of Primary IndustriesS Morris - Wollongbar Primary Ind Inst, NSW Dept Primary Ind, Wagga Wagga, NSW, Australia
- Publication Details
- Bioresource Technology, Vol.173, pp.42-51
- Publisher
- ELSEVIER SCI LTD
- Number of pages
- 10
- Grant note
- NSW Department of Primary Industries, Australia CRDC-DAN1306 / Cotton Research and Development Corporation
- Identifiers
- 991013015698402368
- Copyright
- (C) 2014 Published by Elsevier Ltd. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article