Importance

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Abstract

The present invention relates to a grit chamber, wherein the chamber body of the grit chamber is in the shape of a hollow cylinder with a cone-shaped bottom; a grit channel is installed below the center of the cone-shaped bottom; a grit removing device is installed in the grit channel; a wall mixer, a plurality of vertical mixers and a spiral grit remover are installed in the chamber body; the wall mixer is installed on the wall of the hollow cylinder; the spiral grit remover is installed in the center of the cylinder, and is provided with a grit-removing blade for removing the grit on the cone-shaped bottom; and the vertical mixers are installed at the position close to the cone-shaped bottom and are vertical to the wall. The invention also provides a grit removing system containing a grit chamber and a grit removing method. With the vertical mixers and the wall mixer, the grit removing device is capable of efficiently and completely sinking the grit in the dung of domestic animals into water bottom so as to completely separate the grit from the dung of domestic animals. In the process of material transportation, the feathers contained in the dung of domestic animals pass through a cutting and filtering device so that the feathers become fermentation material.

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First Claim