*****The stack screw type sludge dewatering  machine belongs to the screw press dewatering machine, it can reduce the sedimentation tank and the sludge concentration pool,and save the construction cost of the sewage station. The double screw type sludge dewatering machine is a new type of solid liquid separation device, which can replace the traditional filter, and the filter technology is used to ensure the continuous and stable slurry separation.