Screw-press dewatering machine is an organic sludge dehydrator in which the feature of  dewatering machine is added on the principle of the screw press dewatering machine. The cylinder screen, that incorporates the screw shaft, is comprised of a large number of fixed discs and movable discs that are placed alternately. Since only the movable discs move by contacting the outer periphery of the rotating screw, it has made the dehydrator immune to clogging.

This dewatering machine can be, in addition to the use for excess sludge generated from various types of wastewater treatment methods, used for low concentration sludge (about 0.5%) and also for oily sludge. It saves energy as it is operated by small-sized motors. Moreover, the dehydrator does not produce noise and vibration problems, since the screw shaft rotates in a very low speed.

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