In Japan, mushrooms such as shiitake are produced in a method known as mycorrhizal culture. The mycorrhizal medium consists of a woody substrate such as sawdust and a nutrient source such as wheat bran as raw materials.Due to the recent increase in health consciousness and demand for nest eggs, consumption of oga flour has been increasing along with the increase in mushroom production. Deciduous broadleaf forests, the raw material for oga flour, are decreasing year by year, suggesting that the supply of oga flour suitable for mushroom cultivation may be in short supply.In addition, the disposal of waste mycorrhizal media (waste mycorrhizal beds) after mycorrhizal bed cultivation is problematic due to the high cost of the fuel required for incineration and the generation of greenhouse gases by the incineration process. Therefore, the use of an effective material to replace woody substrate has been considered, but due to problems of availability and supply, no practical material has been found.Therefore, we will try to develop a cultivation technology for mushrooms that will contribute to the construction of a decarbonized society and global environmental conservation by using shredded waste paper.
