Kazunori IWABUCHI* and Tomoyasu ISHIDA**

*Faculty of Agriculture, Yamagata University
**Faculty of Agriculture, Utsunomiya University

+ Correspondence should be addressed to Kazunori Iwabuchi:
Faculty of Agriculture, Yamagata University
(1-23, Wakaba-machi, Tsuruoka, Yamagata 997 Japan)

Abstract

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[Celsius degeree] 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[Celsius degeree] 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.

Key words: water diffusivity, the horizontal infiltration method, dairy cattle solid waste