Main Article Content
Acid hydrolysis of Cowpea seed husk was carried out using sulphuric acid with the concentrations of 0.1 M and 0.5 M at a reaction time of 10 to 90 minutes and temperatures of 130ºC to 170ºC. The substrates were characterised using proximate analysis. The effects of process parameters that were studied on glucose yield were; time, temperature, substrate concentration, and acid concentration. The experimental data obtained for glucose yield were fitted into the Saeman’s model and Two –fraction models. The result obtained from the proximate analysis shows that cowpea seed husk has a cellulose content of 31.7%, hemicelluloses of 26.7% and lignin 6.1%. The maximum glucose yield of 27.1% was obtained at temperature of 150ºC, a reaction time of 50 minutes, 0.02 g/ml substrate concentration, and 0.5 M acid concentration. The two-fraction model gave a better fit of the experimental data over saeman’s model. From the study it is concluded that cowpea seed husk can be a good source for glucose production.
Obot IB, Isreal AU, Umoren SA, Mkpenie V, Asuquo JE. Production of cellulosic polymers from agricultural wastes. E. Journal of Chemistry. 2008;5(1):81-85.
International institute of tropical Agriculture Cowpea; 2014.
(Accessed January 23, 2015)
Latinwa GK, Agary SE. Experimental and kinetic modelling studies on the acid-hydrolysis of Bayan wood cellulose to glucose. Journal of Natural Sciences Research. 2015;14(5):2224-3156.
Joseph TA, Chioma MO, Okechukwu EO. Ethanol production from cassava root sevieate. International Journal of Science and Engineering investigation. 2015;43: 2251-8843.
Schell DJ, Mcmillan JD, Philipidis GP, Hinman ND, Riley C. In advances in solar energy Boer KW, ed, American solar energy society boulder, Co. The residues of today. Trends in Biotechnology. 1992; 7:373-448.
Balat M, Balat H. Recent trend in global production and utilization of bioethanol fuel. Applied Energy. 2009;86(11):2273-2282.
Onyelucheya OE, Adeyemo OE, Onyelucheya CM. Mathematical modelling for the prediction of liquid glucose and xylose produced from cassava peel. American Journal of Engineering Research. 2017;(5):274-280.
Sridevi A, Narasimha G, Ramanjaneyulu G, Suvarnalata Devi P. Saccharification of pretreated sawdust by Aspergillus Niger. Journal of Biotechnology. 2015;5(6):883-892.
AOAC. Official Methods of Analysis of the Association of Official Analytical Chemists,15th edition, Arlington, VA; 1990.
Amenaghawon NA, Ighodalo H, Agbonghae E. Modelling and optimisation of dilute acid hydrolysis of corn stover using Box- Behnken design. Journal of Engineering Science and Technology. 2014;4:442-454.
Saeman JF. ‘Kinetics of wood saccharification hydrolysis of cellulose and decomposition of sugars in dilute acid at high temperature. Industrial and Engineering Chemistry. 1945;37-52.
Lavarack BP, Griffin GJ, Rodman D. The acid hydrolysis of sugarcane bagasse hemicelllulose to produce xylose, arabinose, glucose and other products. Biomass and Bio Energy. 2002;23;367-380.
Gamez S, Gonzalez-cabriales JJ, Alberto-Ramerez J, Garrote G, Vazquez M. Study of the hydrolysis of sugar cane bagasse using phosphoric acid. Journal of Food Engineering. 2006;74:78-88.
Adebiyi OA, Ologhogbo AD, Adu OA, Olasehinde TO. Evaluation of the Nutrional potentials of physical treated cowpea Seed hulls in poultry feed. Emir. J. Food Agric. 2010;22(3):232-239.
Meinita MD, Hong YK, Jeong GT. Comparison of sulphuric acid and hydrochloric acid as a catalyst in hydrolysis of Kappaphycu alvarezii (cotton). Journal of Bioprocess and Biosystem Engineering. 2012;35:123-128.
Uppal K, Kaur R. Hemicellulosic furfural production from sugarcane bagasse using different acid. Sugar Technology. 2011; 13:166–169.
Ajani AO, Agarry SE, Agbede OO. A comparative kinetics study of acidic hydrolysis of waste cellulose from agricultural derived biomass. Journal of Applied Science for Environmental Management; 2011.
Lenihan P, Orozco A, O’Neil E, Ahmad MNM, Rooney DW, Walker GM. Dilute acid Hydrolysis of Lignocellulosic Biomass Chemical Engineering Journal. 2010;156: 395-403.
Haiwei R, Fangxian P, Junmei X, Bingyum Z, Yi Z. Optimization of dilute acid hydrolysis of distillers grains and ethanol fermentation. Journal of Residual Science and Technology. 2015;12:1544-8054.
Aguilar R, Ramirez JA, Garrote G, Vazquez M. Kinetic study of the acid of sugarcane bagasse. Journal of Food Engineering. 2002;55:309-318.