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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11157

Title: Comparative Study on Fungal Pretreatment and Hydrolysis of Cassava Peelings and Rice Husks for Second-Generation Bioethanol Production
Authors: Worfa, Michael N.
Salifu, Samson Pandam
Afotey, Benjamin
Mensah, Moses
Keywords: Second-generation bioethanol
Pleurotus ostreatus
Aspergillus niger
Saccharomyces cerevisiae
Issue Date: 2017
Publisher: American Journal of Biochemistry
Citation: American Journal of Biochemistry 2017, 7(2): 27-36, DOI: 10.5923/j.ajb.20170702.03
Abstract: Fluctuating oil prices and its increasing environmental concerns have revived widespread interest in production of biofuel from renewable (lignocellulose) materials. Rice husk and cassava peelings (agro-wastes with little or negligible values to industries in Ghana) were evaluated as a substitute cost effective feed stock for bioethanol production. This project investigated second-generation bioethanol production by pretreating and hydrolysing agro-waste using Pleurotus ostreatus, Aspergillus niger and a combination of the two fungi. The various hydrolysates obtained were subsequently fermented to ethanol using Saccharomyces cerevisiae. The analysis of lignocellulose fractions was conducted using van Soest refractometer whilst fermentable sugars and bioethanol produced were analysed using gravimetric method. The combination of the fungi gave a better yield of fermentable sugars compared to the yield obtained from hydrolysis by either P. ostreatus or A. niger. Of the two fungi, P. ostreatus hydrolysis of rice husk and cassava peelings gave optimum fermentable sugar concentrations of 2.0 g/L and 34.11 g/L respectively, which were higher than 1.33 g/L and 28.64 g/L obtained from A. niger hydrolysis of rice husk and cassava peelings, respectively. The combination of the two fungi for hydrolysis gave the best results for fermentable sugar of 3.0 g/L and 36.51 g/L for rice husk and cassava peelings respectively, for equal weights of the two substrates. The fermentations results revealed that the maximum ethanol yields for cassava peelings and rice husk were 19.36% and 1.53% (w/w dry biomass), respectively. Hence, it can be concluded that cassava peelings can serve as a better feedstock for production of second-generation bioethanol.
Description: An article published by American Journal of Biochemistry 2017, 7(2): 27-36, DOI: 10.5923/j.ajb.20170702.03
URI: http://hdl.handle.net/123456789/11157
Appears in Collections:College of Science

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