堆肥化反応における水分の影響

抄録

Moisture control is required for optimum composting. In this paper, the effect of moisture was examined by measuring decomposition ratio which is dimensionless loss of mass. In benchi-scale composting, temperature was controlled constant at 50°C with the mixture of newsprint and dog food (sample N) or the mixture of sawdust and dog food (sample S). For each run, moisture content was set differently and maintained constant throughout. To make kinetic consideration, Contois' model is used for expressing the time course of decomposition ratio. Since other experiments confirm that it is suitable for composting compared to Monod's model. Fitting of this model, the experimental results show that optimum moisture content is 50 to 60% for both samples, and the ratio of Contois' constant to maximum specific growth rate (k/μm) is the adequate index for expressing the decompositio rate.