The Effect of Selected Parameters on the Stabilization Efficiency of the Organic Fraction of Municipal Solid Waste (OFMSW) in the Mechanical and Biological Treatment Plant (MBT)

Composting is a natural process; however, many artificial factors have been developed to improve process efficiency for the organic fraction of municipal solid waste (OFMSW) stabilization in the mechanical - biological treatment (MBT) plant. The study aimed to assess the effect of aeration (X1), irrigation (X2), process time (X3) and turning frequency (X4)on OFMSW stabilization after the intensive degradation phase of compositing in a full-scale MBT plant. The four-factorial design on two levels with two replicates was used to the optimization of compost stabilization yield. Among analyzed factors, mechanical turning was found not to significantly influence the effect of stabilization. The achieved determination coefficient (R-2) of 0.94 suggests an adequate representation of the process model and a good correlation between the experimental and predicted values. The achieved stabilization yield obtained in the control run was 47.5%, where the aeration (X1) was set up as blower working cycle: 10 minutes blowing and 5 minutes break, the irrigation level (X2) was set up for 10000 dm(3)/d and process was performed 4 weeks (X3).