Sludge disposal is becoming more and more difficult. For political reasons, in the long term, the option of utilizing sludge on agricultural land is on a downward trend, especially due to residues composed of substances specific to the pharmaceutical industry. Sludge must be transported long distances to available disposal facilities. Sludge drying reduces transport and disposal costs, contributing to sustainable resource conservation. With a positive carbon dioxide balance, dry sludge is an increasingly sought after energy source. Combining incineration with sludge drying is energy neutral.