Influence of Mass Loading on Water Removal and Potential Incineration Pollution of Municipal Solid Waste During Stacking and Fermentation

Abstract:

To investigate the relation between the mass loading and the improvement of incineration properties,four trials of municipal solid waste (MSW) stacking and fermentation under different mass loadings (0,3.20,8.00,12.7 kPa) were carried out in the laboratory for 3 days.The results show that water removal mainly occurs in the first 36 hours,and it has a nonlinear relationship with the mass loading.The water removal efficiency decreases when the mass loading is higher than the optimal value (8.00 kPa in these experiments).Although the concentrations of combustible Cl,S,and heavy metals in the pretreated waste increase,which are positively correlated with the quantity of the water removed,the decline of the total amount of these pollutants and their concentrations per unit of lower heating value is observed.Therefore,the incineration pollution potential improves greatly after the MSW stacking and fermentation process.

Key words:refuse storage pit in incineration plant; water removal; lower heating value; secondary pollution