| 摘要 |
<p>A membrane separation device comprises a membrane unit that includes membrane modules piled in a direction of a depth of a biological reactor, an air diffusing member arranged below the membrane unit to diffuse air for cleaning membranes of the membrane unit and an air bubble group splitting member arranged between the membrane unit and the air diffusing member to split an air bubble group supplied from the air diffusing member into air bubble groups. The air bubble group splitting member has a diameter larger than that of the air diffusing member and is a three-dimensional obstruction member arranged in parallel with an axis of the air diffusing member. The air bubble group splitting member has a vertical cross section of which a lower part is projected downward, and has a vertical cross section of which an upper part is triangular and a lower part is semicircular.</p> |
