Journal article
Ethanol production from Eucalyptus plantation thinnings
Bioresource Technology, Vol.110, pp.264-272
04/2012
PMID: 22342086
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Abstract
Conditions for optimal pretreatment of eucalypt (Eucalyptus dunnii) and spotted gum (Corymbia citriodora) forestry thinning residues for bioethanol production were empirically determined using a 33 factorial design. Up to 161mg/g xylose (93% theoretical) was achieved at moderate combined severity factors (CSF) of 1.0–1.6. At CSF>2.0, xylose levels declined, owing to degradation. Moreover at high CSF, depolymerisation of cellulose was evident and corresponded to glucose (155mg/g, ∼33% cellulose) recovery in prehydrolysate. Likewise, efficient saccharification with Cellic® CTec 2 cellulase correlated well with increasing process severity. The best condition yielded 74% of the theoretical conversion and was attained at the height of severity (CSF of 2.48). Saccharomyces cerevisiae efficiently fermented crude E. dunnii hydrolysate within 30h, yielding 18g/L ethanol, representing a glucose to ethanol conversion rate of 0.475g/g (92%). Based on our findings, eucalyptus forest thinnings represent a potential feedstock option for the emerging Australian biofuel industry.
Details
- Title
- Ethanol production from Eucalyptus plantation thinnings
- Creators
- S McIntosh - NSW Department of Primary IndustriesT Vancov - NSW Department of Primary IndustriesJ Palmer - NSW Department of Primary IndustriesM Spain - NSW Department of Primary Industries
- Publication Details
- Bioresource Technology, Vol.110, pp.264-272
- Publisher
- Elsevier Ltd
- Identifiers
- 991013015698202368
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article