Bio-ethanol production from saccharified sawdust cellulose obtained from twenty different trees along the Lagos Lagoon in Nigeria
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Date
2018-06-26
Authors
Okiei, W O
Journal Title
Journal ISSN
Volume Title
Publisher
BIOSCIENCE RESEARCH
Abstract
Lignocellulosic biomass can be adequately utilized in the production of bio-ethanol, a promising
alternative energy resource for non-renewable fossil fuels. The development of renewable energy
resources involves mainly the hydrolysis of the cellulose component of waste biomass into glucose and
the successive fermentation of the resulting sugars into ethanol. An investigation into the use of
sawdust waste from twenty different tropical hardwoods for bio-ethanol production has been performed.
Kraft-pretreated waste cellulose from the various trees have been saccharified with T. viride cellulase as
well as sulphuric acid. The resulting sugars were converted into bio-ethanol by means of separate
hydrolysis and fermentation (SHF) as well as simultaneous saccharification and fermentation (SSF).
The highest alcohol concentration of 3.71 mg.ml-1 was obtained during the separate hydrolysis and
fermentation process converting K. ivorensis wood sawdust whilst the lowest alcohol concentration of
2.54 mg.ml-1 was recorded with Ipomoea asarifolia cellulose. During SSF the highest alcohol production
was calculated at a value of 3.89 mg.ml-1
, produced from K. ivorensis cellulose with the lowest
concentration obtained at 2,73 mg.ml-1
obtained from cellulose extracted from Erythropleum suaveolens.
Fermentation of sugars obtained after sulphuric acid catalyzed degradation of these cellulose materials
produced the highest ethanol concentration of 3.32 mg.ml-1 with the lowest bio-ethanol concentration
(1,86 mg.ml-1
) obtained from Masonia altissima cellulose. The highest relative percentage yield of
alcohol obtained after acid catalyzed saccharification was 40% calculated with cellulose from Kyaya
ivorensis whilst a maximum extent of 65% alcohol production was evident during the fermentation of
sugars produced from T. viride cellulase catalyzed saccharification of Masonia altissima cellulose.
Description
Keywords
Bio-ethanol , Lignocellulosic biomass