Abstract: A waste disposal device includes a grinder tank disposed within a housing and having an inner rounded surface angularly extending about an axis for loading of kitchen waste therein, and a grinder assembly rotatably mounted in the tank about the axis to stir and shred the waste and configured to force the waste to advance forward so that the shredding and drying process can be carried out efficiently. A condensing unit is disposed to cool and condense hot air in the housing into water which is drained through a drain port to thereby reduce leakage of unpleasant odor through an access opening of the housing.

Abstract: A grinder assembly for a waste disposal device includes a rotary shaft mounted rotatably in a grinder tank about an axis, a shredding blade unit, and a plurality of interconnecting ribs extending radially to interconnect the shredding blade unit and the rotary shaft. The shredding blade unit is configured to be rotated along a spiral path and has a forward-facing major surface which forces kitchen waste in the grinder tank to advance forward so as to render the stirring and shredding operation efficiently.