With the population exploding and improvement of urbanization, the sewage sludge production increases rapidly with
the increasing of sewage. However, high water content has been a big problem for sewage sludge treatment and
disposal. Thermo-heating is one of the mature methods to reduce the water content in sewage sludge, but the
promotion of thermo drying is very restricted by its high cost because of abundant consumption of energy and its
expensive equipments. In order to save energy and reduce investment for equipments, we studied the low-temperature
thermo-drying efficiency by varying the temperature from 100