Assessment of quantities and composition of corn stover in Ghana and their conversion into bioethanol

Abstract

Corn stover (CS) has currently received great attention worldwide as a potential feedstock for the production of bioethanol as alternative renewable fuel or additive to gasoline. This work evaluates the quantities and chemical characteristics of the CS available in Ghana and their conversion into bioethanol. The average quantity of CS production in Ghana per year was estimated to be 1.77 × 106 t. The cellulose, hemicellulose, and lignin contents of CS obtained from Pioneer 30 W 40, a local maize variety, were found to be 37.72 %, 20.62 %, and 30.50 %, respectively. Alkali pretreatment and enzymatic hydrolysis of the CS yielded a reducing sugar concentration of 157.96 mg/ml within 24 h and an ethanol yield of 0.045 l/kg. It was estimated that 40 % of the average annual CS production has the potential of yielding 140.855 × 106 l of bioethanol.

Keywords

• Renewable energy
• Feedstock
• Corn stover
• Bioethanol