The GT series belt sludge thickener is designed to carry out condensation and dehydration for sludge containing solids in 0.1%-1.5%, for general non-digested municipal sewage sludge, the solid content of final sludge can reach 5-7%. When the equipment is provided with hydrophobic plough, pressure plate or pressure roll, the solid content of final sludge for some sludge can reach 10-12%. The operating speed of filter belt can be adjusted between 0.8-4 M / min.