TW257699B - Waste pulping and liquid extraction system and method including automatic bag feeding - Google Patents

Abstract

A waste compaction and liquid extraction system and method are provided. The system includes a tank for containing liquid and solids, and a tray that seats on the tank. The tray includes a feeding mechanism for moving bags of waste across the tray, and a stuffing mechanism for pushing the bags down into the tank. A rotary disc impeller is mounted in the tank for grinding the solids to form a mixture of liquid and solids. The impeller has a rotating blade with inclined and bevelled cutting members. A stationary helical screw is horizontally mounted to the output port of the tank. The screw has a receiving end adjacent to the output port and a discharge end. The tank conducts the mixture to the receiving end of the screw. A sieve is provided having a cylindrical sieve surface surrounding the screw. The liquid drains through the sieve. The sieve is rotatably mounted to the output port of the tank. The sieve rotates about the screw to move the solids longitudinally towards the discharge end of the screw. A restrictor at the end of the sieve maintains backpressure to squeeze liquid out of the partially dried solids. A housing surrounds the sieve. The housing is mounted to the input port of the tank for communicating liquid that drains from the sieve back to the tank by way of the input port.