A cell wall or cell membrane crushing device, comprising a fixed disk, a rotating disk, a rotating shaft for driving the rotating disk, a decompression means, and a housing, wherein at least one set of the fixed disk and the rotating disk is disposed to face each other, and the central portion of the fixed disk is , Having a cavity larger than the outer diameter of the rotating shaft passing through the central portion, and the shear force generated between the rotating disk and the fixed disk is applied to the object fluid having a moisture content of 89% or more introduced into the device, and the pressure in the cell wall or cell membrane crushing device, Provided is an apparatus for crushing cell walls and / or cell membranes of microorganisms, seaweeds, and the like contained in organic sludge, etc., which are reduced to -0.08 MPa or less by a pressure reducing means. The device can contribute to increasing the amount of biogas, reducing sludge, cultivating seaweed, cultivating plants, and cultivating aquatic products. For example, CH
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