Balance of Supply and Demand of Sub-materials for Livestock Excreta Composting and Development of Model to Optimize the Balance

Abstract

It is necessary for composting of livestock excreta to adjust water content with sub-materials such as rice straw, and the acquisition of sub-materials was often a problem in composting plants. In this research, we developed a model to optimize the transportation of sub-materials. As the result of applying the model to Saitama prefecture, it was concluded that the utilization of sub-materials used for plowing in rice fields and the transportation of them over 20km from the northern east area to the western area is effective in the balance of their supply and demand.