Method and arrangement for dewatering sludge

Method for processing sludge to increase the dry solid concentration of the sludge, wherein provided sludge to be processed is characterized in terms of at least one sludge characteristic, the method comprising steps of:

• distributing the sludge for continuous transport in a specific form factor, providing a distributed sludge;
• cooling the distributed sludge into a frozen state using a refrigerating medium, providing a frozen sludge;
• thawing the frozen sludge using a first heating medium, providing a thawed sludge;
• drying the thawed sludge to a targeted dry solid concentration using a second heating medium,
• wherein at least one aspect of the method is controlled by a processing parameter, wherein the distributed sludge is continuously transported at a transport speed during at least one of the steps relating to distributing, cooling, thawing, and drying, the method further comprising steps of
• monitoring at least one processing parameter, and
• adjusting at least one processing parameter with respect to a corresponding reference value based on said at least one sludge characteristic or user input to improve sludge processing.