Energy input/output analysis for technical innovation of non-grain based fuel ethanol production at COFCO(Anhui)
The technical innovation of non-grain raw material utilization at COFCO(Anhui) grain fuel ethanol plant with production capacity of 150000 tons has achieved the desired result. Based on the summary of technical innovation of non-grain raw material,the energy efficiencies of cassava and corn fuel ethanol production processes were analyzed and the impact of changes in raw material was evaluated using energy input/output analysis. The future development of non-grain biomass liquid fuel was discussed. The transformation of production process had a significant impact on energy efficiency. The net energy value of corn ethanol was 1.77MJ/L,while that of cassava ethanol was 7.82MJ/L, indicating higher energy efficiency of cassava ethanol fuel. However,considering such factors as energy efficiency,carbon emissions and land use,raw material for ethanol fuel should mainly be turned to agricultural and forestry waste,and the size of cassava ethanol should not continue to be expanded.