Feasibility of Bioethanol Production from Tubers of Dioscorea Sansibarensis and Pyrenacantha Kaurabassana
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Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Inedible tubers from Dioscorea sansibarensis (DS) and Pyrenacantha kaurabassana (PK) were found to be suitable feedstock for bioethanol production. Important composition parameters for bioethanol production for DS and PK are dry matter (% fresh tubers) ca. 20 and 6, total carbohydrates % dry weight base (db) ca. 68 and 47 and total protein (% db) ca. 16 and 10, respectively. DS and PK were found to contain inulin and galactomannan as principal polysaccharides (% of total carbohydrate) ca. 90 and 70, respectively.
Diluted acid hydrolysis yielded ca. 100% of total reducing sugars. Ethanol yield ca. 56 and 35 g/L was obtained at high efficiency through batch fermentation of acid hydrolysate (25% w/v) of DS and PK, respectively. A simple technique of recording and monitoring ethanol through CO2 generated during fermentation correlated strongly with HPLC measurement R2 = 0.99. Thus, tubers from these plants are potential feedstocks for bioethanol production with no competing uses.
Description
Full text can be accessed at
http://www.sciencedirect.com/science/article/pii/S0960852415011323
Keywords
Dioscorea sansibarensis, Pyrenacantha kaurabassana, Feedstock composition, Bioethanol, Carbon dioxide measurement
Citation
Moshi, A.P., Nyandele, J.P., Ndossi, H.P., Eva, S.M. and Hosea, K.M., 2015. Feasibility of bioethanol production from tubers of Dioscorea sansibarensis and Pyrenacantha kaurabassana. Bioresource technology, 196, pp.613-620.