期刊名称：International Journal of Environmental Science and Development
印刷版ISSN：2010-0264
出版年度：2014
卷号：5
期号：4
页码：367-369
DOI：10.7763/IJESD.2014.V5.511
摘要：In the study rice husks and groundnut shells were hydrolysed with 3, 4 and 5% concentrations of dilute hydrochloric acid and the reducing sugar concentration was determined using the dinitrosalicylic acid (DNS) colorimetric method.The concentration of the bioethanol produced was determined using the potassium dichromate method.The results revealed that there is no significance difference (p<0.05) in the yields of the reducing sugar obtained from the substrates at different treatment conditions (0.46mg/l from rice husks at 3%, 40oC for 30 minutes, 0.45mg/l from groundnut shells at 4%, 30oC for 25 minutes and 0.46mg/l from rice husks and groundnut shells at 5%, 30oC for 30 minutes).Similarly, the result revealed that both S.cerevisiae and Z.mobilis produced their highest bioethanol concentrations of 0.58% and 0.54% respectively from rice husks after 24 hours of fermentation while their combination produced its highest concentration (0.524%) after 72 hours.It is evidently clear that there despite the fact that there was no significance difference (p<0.05) in the yields of bioethanol produced by S.cerevisiae and Z.mobilis, S.cerevisiae proved to be a better choice in bioethanol production using these substrates that either Z.mobilis or their combination.
