Optimization of saccharifi cation prospective from starch of sweet potato roots through acid-enzyme hydrolysis: struc- tural, chemical and elemental profi ling

Petroleum is the key source of energy for the consumption of automobiles. Above and beyond the adverse global warming effect of fossil fuels, unpredictable oil price and political instability in the oil trading nations ensured a substantial rise in world-wide attention for alternate fuels. Both developed and industrialized countries consider biofuels such as ethanol and hydrogen as appropriate sources for the reason of energy security. Ethanol is one of the finest fluid alternatives of fossil fuel and has emerged as a promising energy substitute (Busic et al. 2018). Meanwhile, it is also reported that the plant biomass containing starch and sugar can be easily fermented to produce alcohol; however, the rate ARTICLE