| 摘要 |
<p>PURPOSE:To miniaturize a fluidized bed septic tank without a precipitation tank and establish stable treated water quality by feeding oxygen to treated water from a solid and liquid separation layer outside a system and allowing it to circulate in a fluidized bed septic tank. CONSTITUTION:A fluidized bed septic tank 10 is filled with a filter material 14, and waste water is supplied from the bottom of the tank 10. then a part of treated water is extracted from a supernatant above which is available by solid and liquid separation. After this, oxygen is supplied to said treated water outside of a system with the removal of bubbles, and again the treated water is returned to the bottom as a fluidization source for filter material 14 in the tan 10. As a result, the fluidized bed septic tank 10 can be miniaturized without a precipitation tank and stable treated water quality be obtained.</p> |
