| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane washing method, or the like, capable of preventing local excess or lack of aeration and stably maintaining uniform washing of the whole of membrane surface of a separation film membrane. SOLUTION: In a treating apparatus 10, a monitoring device 5 for monitoring the aeration state of a liquid level part S of a liquid L0 to be treated in a treating tank 1 is provided above the treating tank 1 installed with a membrane module 2 and a diffuser 70. An image photographed by the monitoring device 5 is outputted to a control device 6 and the existence of bubbles is determines by a light and shade treatment of the image. From this determination result, an amount of aeration at a presumed area unit corresponding to a diffusing unit 7 is taken-in and adjustment of the amount of aeration is carried out based thereon when excess of or lack in the amount of aeration is generated. As a result, local excess or lack in the amount of aeration is made appropriate and a uniform membrane washing can be accomplished. |
