| 摘要 |
PURPOSE:To purify effectively treating waterways by separating the treating waterway with a baffle plate, floating a biological filter medium in each partition, and providing a sludge discharging channel piercing through the bottom part of the waterway in each partition and a sludge collecting trap. CONSTITUTION:Air is injected by turning intermittently a control valve 13 on and off. In this case, simultaneous injection of air into each partition A, B, and C is unnecessary, and successive injection into each partition is effective in consideration of the amt. and pressure of the air. The water and the biological filter medium 1 are shaken by air injection, and the flowing out of the biological filter medium 1 is prevented by baffle plates 5 which are inverted alternately. The sludge, earth, and sand sticking to the surface of the biological filter medium 1 are released, and settled into a sludge discharging channel 3 of the waterway. The sludge which is moved to the downstream side of the sludge discharging channel 3 is collected by a sludge collecting trap 8, and discharged to the outside of the waterway through a slurry pump 9, a sludge discharging pipe 10, and a control system.
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