The invention's as installing membranes submerged for use in radioactive waste water treatment plants of nuclear power plants in the solid-liquid separation tank of waste water treatment apparatus, it is possible to reduce the radiation dose of the treatment capacity of the radioactive waste liquid increases with submerged membrane replacement convenience of a work improvement and worker in that providing the waste processing apparatus is an object.
The waste liquid tank which is not transmitted through the inlet and exhaust filtration for implementing the objectives as described above; Waste liquid inlet which waste liquid is introduced into the water tank; A plurality of immersion type, which are arranged spaced in an annular inside the water tank filtering the foreign substances contained in the waste liquid flows through the inlet the waste film; Sucking the permeated water of the waste liquid that has passed through the submerged membrane to permeate suction unit to discharge to the outside the water tank; An air supply for supplying compressed air to the submerged membrane to prevent sticking of foreign matters to the submerged surface of the film; In addition, surface and submerged membrane should support the lower portion includes a plurality of holes formed in the base plate is known.