Against pathogens Against pathogens Against pathogens Sludge Sludge Sludge
Process Bacteria Viruses Eggs Sludge stability Volume reduction Odor potential Remarks
Composting +++ ++ +++ +++ +++ Effect depends on mixture
Autothermal aerobic digestion +++ +++ +++ ++ ++ ++ Effect depends on operational regime
Pasteurization +++ +++ +++ ++ + ++ Must be previously stabilized
Lime treatment
+++
+++
+++
++
+++
Effect depends on maintaining pH
Thermal drying +++ +++ +++ +++ +++ + Stabilization and total inactivation
Incineration +++ +++ +++ +++ +++ + Stabilization and total inactivation