International Journal of Engineering and Techniques – Volume 6 Issue 1, January 2020ISSN: 2395-1303 http://www.ijetjournal.org Page 1HaProduction of bioethanol by hydrolysis and alcoholicfermentation of sugar present in the wood: Case of FrakéBoniface EFON1⃰,2,4, Paul Fabrice NGUEMA2, Denis NTAMACK3,AnicetRodrigue NGANDJON KAYE4*Corresponding author, E-mail: efonboniface@yahoo.fr; Tel: (+237) 677 75 1083/691 71 52 97; Fax: (+237) 222 23 00 071,2,4(School of wood, Water and Natural Resources, Faculty of Agronomy and AgriculturalSciences, the University of Dschang, P.O Box 786 Ebolowa, Cameroon ; Email :efonboniface@yahoo.fr, nguema.fabrice@gmail.com, evan.ngandjon@gmail.com )3(Laboratory of Civil Engineering and Design Sciences, Department of Civil Engineering, ENSP,the University of Yaoundé I, P.O Box 8390, Cameroon ; denisntamack@yahoo.fr)
Abstract:
Bioethanol is one of the most promising and friendly alternatives of our environment to fossil fuels, which is
produced from renewable energy sources. Although the current fuel ethanol is generated from edible sources (sugar
and starched plants), the lignocellulosic biomass (LB) because of its potential, has attracted the attention of users
from Central African countries who have a huge potential in trees. Fraké is one of those tropical tree species from the
Combretaceae family that overloads the Congo Basin. Obtaining bioethanol by recovering Fraké wood waste was
done by anaerobic fermentation process using the Saccharomyces cerevisiae yeast strain. The results achieved
showed a polysaccharide rate of 55.1%; a extractable rate of 24.7%; the percentage of polysaccharide conversion
was 4.6%; the analysis of the ethanol obtained gave the values of boiling point (79 ° C), the density (0.82 g / ml) as
well as the relative density (0.82). These results show that waste from Fraké is a lignocellulosic biomass with little
wood which takes an interesting energy benefit because of its high level of polysaccharides which can be hydrolysed
to produce bioethanol, particularly in sub-Saharan Africa where the access to energy still remaining at a very low
rate.
Keywords – Bioethanol, cellulase, enzymatic hydrolysis, saccharomyces cerevisiae.
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