Patent ID: 6273270
Filing Date: 2001-08-14
Classification: B01D

Abstract:
A waste water treatment apparatus, comprising:a waste water storage tank for storing waste water containing oily substances and supplied thereinto;a waste water treatment tank for storing the waste water having been treated;a dam with a prescribed width formed to the upper end edge of said waste water storage tank on a downstream side for causing at least the upper surface of the waste water to flow out of said dam;a strip-shaped permeable sheet fed from a roll just below said dam so as to traverse obliquely upward the waste water flowing out of said dam in the flowing direction of the waste water;a plurality of guide rollers causing said strip-shaped permeable sheet to be folded along its length; anda winding member to wind the resultant folded sheet into a roll;wherein the waste water having been treated by passing through said permeable sheet is stored in said waste water treatment tank.