Abstract
A master equation was derived for a batch composting process, considering the principal state variables of the process as random variables. Using the first and second moments of the random variables obtained from the master equation, a method was developed for predicting the expected values and their standard deviation theoretically. After estimating the value of unit concentration step ε for the stochastic process, from the experimental results of standard deviation of temperature in the compost mass, the stochastic model simulation was carried out. Calculated result of standard deviation of substrate concentration at the end of the experiment agreed well with the experimental result.
