No abstract

The perspectives of oil milling technology have been evaluated with respect to the minimization of energy demand and emission rates (CO2-, hexane). Based on the computer modelling of the current oil milling process, steps like dehulling and extrusion are introduced in the process line. Characteristical data like energy consumption divided in electric and thermal energy, CO2-equivalent-emission, hexane-emission of various process lines have been computed. An optimization of heat flow has been performed with reference to the pinch technology. The energy demand of an oil mill, which process dehulled rape seeds could be generated by the thermal utilization of the hulls. In comparison to existing plants a reduction in process energy demand of 20 % can be predicted for the optimized oil milling process. Because of the energy generation using the hulls the CO2-emission is changed drastically. Existing plants emit 237 kg CO2-equivalent-emission per ton oil because of the consumption fossil ene rgy resources. Whereas the optimized plant could produce more electric and thermal energy as it needs. Therefore assuming new energy generation process negative value of 262 kg CO2-equivalent could be computed