| 摘要 |
<p>PURPOSE:To efficiently treat waste water, by mounting a means for withdrawing pellets from the pellet bed formed to the upper part of a fluidized bed and a means for supplying a part of treated water to the lower part of a reaction tank. CONSTITUTION:Raw water is introduced into a reaction tank 1 from a raw water introducing pipe 2 and a receives anarobic decomposition treatment in a fluidized bed. The SS-component in raw water is slow in its decomposition speed within the fluidized bed 7 and the remarkable portion thereof is flowed out from the decomposition fluidized bed 7 to enter a pellet bed 8 where bonded to the other SS-component to form pellets or adhered to the surfaces of the pellets to grown pellets and the SS-component is sufficiently removed. The sewage, wherein a dissolvable org. substance and SS-type org. substance were removed sufficiently, is discharged from a take-out pipe 3 and a part thereof is recirculated and supplied to the lower part of the reaction tank 1 from piping 5.</p> |
