| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a multi-stage UASB(upflow an aerobic sludge bed) device simplified in device structure by simplifying the structure of a gas, liquid, solid/ liquid separating part (GSS part) and collecting a generated gas to one place and removing it. SOLUTION: An outer cylinder 1 and an inner cylinder 2 are provided, the outer cylinder 1 opens a gas vent opening 3 at the upper part, the inner cylinder 2 has a flow-out opening 10 for a treated water, which runs through the outer cylinder 1 in the vicinity of the upper end and is communicated with the outside, a gas vent means for discharging a gas between the inner cylinder peripheral wall and the outer cylinder peripheral wall from the inner cylinder is provide in the side wall, a flow-in opening for a water to be treated is opened to be communicated with the outer cylinder in the bottom, the diameter of the outer cylinder 1 decreases toward the lower part to be conical and flow-in pipe 5 for the water to be treated is opened at the lower end of the diameter decreased part. The gas vent means has notched openings 8 in the side wall and a baffle plate 9 or preferably can have a flap plate and a stopper.</p> |
