A dynamic simulation model of in-situ composting of caged layer manure

A dynamic simulation model for in-situ composting of caged layer manure in- house, was developed and implemented on STELLA((R)) modeling environment. T he model formulation was based on solids mass balances, water balances and energy balances. The model was validated with the following parameters from pilot studies: temperature profiles, bulk wet weights, dry weights, and mo isture contents. Approximately all the simulated values of bulk wet weights , dry weights and moisture contents fell within one standard deviation of t he measured values over four different samplings within the year the experi ment was conducted. Similarly the simulated cyclic-temperature profiles pre dicted the measured temperature profiles fairly accurately, except at point s immediately after the weighing sessions.