摘要 |
<p>PURPOSE:To treat waste water with high efficiency by the procedure in which waste water is passed through a drawing path bored near the fluidizing interface of particles in apparatus and an ultrasonic wave is applied to the particles to separate spudge adhered to the particles. CONSTITUTION:The drawing path 4 is provided near the fluidizing interface 2 of particles inside the fluidized bed type waste water treatment apparatus 1, and the ultrasonic vibrator 6 is provided on the way of the path 4. The waste water supplied from the water feed pipe 9 to the waste water treatment apparatus 1 is treated in the expanded layer of fluidized particles formed in the apparatus 1 and then discharged from the drain pipe 10 provided near the upper water surface 3. On the other hand, a part of waste water to be treated is sent, together with sludge-adhered particles, to the separation tank 7 through the drawing path 4, during which ultrasonic wave from the oscillator 5 is applied through the ultrasonic vibrator 6 to separate sludge adhered to the particles. Then, the particles deprived of sludge, deposited at the bottom of the separation tank 7, is returned through the return pipe 8 to the apparatus 1 and also the waste water containing the sludge separated is discharged from the drain pipe 11.</p> |