| 摘要 |
<p>PURPOSE:To prevent the clogging of a ceramic filter by constituting the air diffusion pipe arranged under the filter module in an aeration tank so that the caliber of each of the air supply orifices thereof is larger than 0.2mm and smaller than 10mm. CONSTITUTION:A filter module 3 formed by collecting a large number of tubular ceramic filters is provided to the upper part in the tank main body 2 of an aeration treatment tank 1 and an air diffusion pipe 4 is provided to the lower part in said tank main body 2. The caliber of the air supply orifices of the air diffusion pipe 4 is formed so as to be larger than 0.2mm and smaller than 10mm. By this constitution, the diameter of each of air bubbles injected from the air supply orifices becomes large to forcibly clean the surface of the ceramic filters and the clogging of said filters is prevented.</p> |
