Ethanol production from Eucalyptus plantation thinnings

Bioresource Technology
S McIntoshM Spain

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 3(3) 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.

References

Feb 8, 2003·Bioresource Technology·G GarroteF López
Dec 14, 2004·Bioresource Technology·Nathan MosierMichael Ladisch
Feb 14, 2006·Bioresource Technology·Eliana Vieira CanettieriJoão Batista de Almeida e Silva
Feb 27, 2007·Trends in Biotechnology·Charles E Wyman
Mar 6, 2007·Biotechnology and Bioengineering·Tina JeohDavid K Johnson
Sep 29, 2007·Journal of Agricultural and Food Chemistry·Gil GarroteJuan Carlos Parajó
Dec 26, 2007·Bioresource Technology·Oscar J Sánchez, Carlos A Cardona
Jun 10, 2008·Nature Biotechnology·Trevor M FenningKevan M A Gartland
Jul 17, 2010·Bioresource Technology·Aloia RomaníJuan Carlos Parajó
Nov 25, 2011·Enzyme and Microbial Technology·Youngmi KimMichael R Ladisch

❮ Previous
Next ❯

Citations

Dec 5, 2015·Frontiers in Bioengineering and Biotechnology·Adam L HealeyRobert J Henry
Mar 3, 2015·Bioresource Technology·T VancovR Stuetz
Sep 15, 2015·ChemSusChem·Marcos Henrique Luciano SilveiraLuiz Pereira Ramos

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.