| 摘要 |
<p>PURPOSE:To certainly and easily perform the discharge treatment of sludge, by providing a sludge accumulation part to the bottom part of a water channel while arranging a screw conveyor to said sludge accumulation part to extrude sludge to a sludge discharge passage. CONSTITUTION:When raw water is flowed into a tank 1 from a raw water inflow port 3, said raw water is flowed into a water channel 5 and passed between packing materials 6 to be transferred along the water channel 5 in a zigzag pattern. At this time, the contact oxidation of raw water with the microorganism films deposited to the packing materials is well performed while sludge detached from the packing materials 6 is accumulated to the sludge accumulation part 7 provided to the bottom part of the water channel 5. Subsequently, when a screw conveyor 8 is rotated by a motor 10 to extrude sludge into a sludge discharge passage 9, said sludge is flowed into the sludge discharge passage 9 and flowed out to a precipitation tank through said discharge passage 9.</p> |
