Parameter Optimization for the Maximum Conversion of Organic Matter in Composting Process
In this paper, the optimization of process parameters for the composting process in a batch reactor was performed. Optimized process parameters are airflow and the initial moisture content. The objective function for the optimization problem the maximization of degradation of organic matter is selected. The mathematical relation for the objective function was derived from experimental data and data obtained by numerical simulations. The experimental data of variables were fitted using the multiple regression analysis and found it was statistically significant.Experimental data include a wide range of values for airflow and initial moisture content, which give a maximum degradation of organic matter of 50.1% for a process that lasts (the longest) continuously for 23 days. The optimization problem was solved by applying nonlinear optimization within the Matlab programming package. The obtained optimum values of airflow and moisture content are 0.296 m3/(kgomh) and 61.6%, respectively. Verification of the process for optimized process parameters was performed in the pilot batch reactor with controlled conditions (SD + 5% of the maximum conversion of organic matter).