| 摘要 |
In a water treating device with a water wheel arranged on upper side of an immersion filter bed for performing surface aeration, the immersion filter bed is composed of a plurality of filter bed elements including a net-shaped substance as main element, which elements are stood in parallel or laminated. In this constitution, the microorganisms are adhered and activated throughout the whole filter bed, and closing due to waste substances is not easily produced, thereby the water treating efficiency is significantly improved. |
