Investigation of Water Diffusivity of Dairy Cattle Solid Waste by the Horizontal Infiltration Method

This paper describes an investigation of the water diffusivity of dairy cattle solid waste including cattle manure and the sawdust of Japanese cedar. The dairy cattle solid waste was dried at 40°C in an electric drying oven, then the dried matter was packed in an acrylic column to be used for measurements. The water diffusivity was measured by the horizontal infiltration method at 20°C atmosphere. The result shows that the water diffusivity of the dairy cattle solid waste is from 10-9 to 10-7 m2⋅ s-1. The water diffusivity is presented as a function of volumetric water ratio (water vol. / solid vol.) at the range of 9.2-13.8% of solid ratio.