Mechanical Dewatering and Thermal Drying of Residual sludge

摘要

The optimal management of a residual sludge dewatering unit using mechanical dehydration and thermal drying needs a good evaluation of the interactions between those two processes. In particular it is necessary to appreciate the dependence between the mechanical step and the drying behaviour. This influence is estimated by the comparison of drying rate curves fitted on cakes obtained with different filtration-compression running conditions (various applied pressures, compression time, conditioning). Laboratory experiments were carried out on several residual sludges (organic, mineral, biological).