| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an air diffusion method and an air diffusion system capable of surely removing the deposits to air diffusion bores and of maintaining treatment efficiency at a high level in a biological treatment by shortening the time for stopping ventilation in diffusing air to water to be treated by using an air diffuser provided with air diffusion membranes. <P>SOLUTION: The air diffusion method comprises using the air diffuser which is provided with plates and the air diffusion membranes arranged to cover the plates and has air housing sections between the plates and the air diffusion membranes. The method includes an air diffusion step of supplying air to the air housing sections of the air diffuser arranged in the water to be treated and spouting air bubbles into the water to be treated from the air diffusion bores produced by expanding the air diffusion membranes by the pressure of the air, and a washing step of stopping the supply of the air while keeping the air diffuser arranged in the water to be treated and washing the air diffusion bores by washing water. <P>COPYRIGHT: (C)2004,JPO</p> |
