Patent ID: 9017555
Filing Date: 2015-04-28
Classification: B01D

Abstract:
1. A waste liquid treatment apparatus comprising: a water tank into which a waste liquid is introduced and from which filtered permeated water is discharged; a waste liquid introduction section through which the waste liquid is introduced into the water tank; a plurality of submerged membranes annularly disposed in the water tank, spaced apart from each other, and filtering foreign substances contained in the waste liquid introduced through the waste liquid introduction section; a permeated water suctioning section suctioning permeated water of the waste liquid which has passed through the submerged membranes, and discharging the permeated water outside of the water tank, wherein the permeated water suctioning section comprises a permeated water suctioning line; an air supplying section supplying compressed air to the submerged membranes to prevent the foreign substances from sticking to surfaces of the submerged membranes; a porous support plate supporting lower ends of the submerged membranes, and having a plurality of pores on a surface of the porous support plate; a rotary shaft coupled to the permeated water suctioning line and to the porous support plate within the water tank; and a coupling portion coupling the rotary shaft to the porous support plate and including engaged complementary screw threads on the rotary shaft and on the porous support plate so that, upon rotation of the rotary shaft, position of the porous support plate within the water tank is varied, relative to the permeated water suctioning line, upward and downward depending upon direction of rotation of the rotary shaft.