| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a monitoring method and monitoring device of slime adhesion state in a water system that can accurately obtain the continuous variation of the slime adhesion state in real time without being affected by a factor other than the slime, such as an underwater SS component.SOLUTION: Water (raw water) extracted from a water system is made to flow through a hollow fiber membrane by a crossflow method, and the slime adhesion state is monitored on the basis of the variation in differential pressure between the raw water inflow side and the permeated water outflow side of the hollow fiber membrane. By making the water extracted from a target water system flow through a hollow fiber membrane module by the crossflow method, the slime adhesion state can be continuously obtained in a relatively short time on the basis of the pressure change between the front and back of the membrane due to the slime adhering to the surface of the hollow fiber membrane. Furthermore, as in a total amount filtration method, this method is hardly been affected by a factor other than the slime, such as an underwater SS component.</p> |
