Recently, the Ministry of Industry has made efforts to expand renewable energy by 2030, and the Ministry of Environment has sought to revitalize solid fuels from livestock manure, which is a type of bio-energy source, such as reviving laws to activate solid livestock fuels. However, the operating costs of fuel-manufacturing facilities must be reduced to activate solid livestock fuels. The proper dryer must be selected to reduce the drying cost, which comprises the majority of the operating expenses. Laboratory-scale experiments were conducted to confirm the possibility of drying cow manure, the feasibility of utilizing waste heat and the existence of an adhesion solution. Some adhesion phenomena were detected from the disk-dryer results. However, this phenomenon disappeared when the water content of the cow manure was below 50%. A water content of 41% was used to confirm this adhesion phenomenon in the cow manure. Because of the high viscosity of cow manure, a recycling method had to be applied through the disk to match the water content in the dryer. A drying test with a duct rotary dryer confirmed that waste heat that is generated from power plants can be utilized to lower the moisture content of solid fuels in livestock waste to 20%.