MBR membrane integrity detection

2023-12-05

The integrity of the membrane affects the quality of MBR produced water. When the hollow fiber membrane filament breaks for some reason, the raw water on the inlet side will enter the water-producing side directly through the broken membrane filament, resulting in the decline of the water-producing quality. Therefore, effective measures should be established to detect the integrity of the film in practical applications.There are two types of measures to detect membrane integrity: direct method and indirect method. The direct method is based on the principle of bubble point test. After the film is completely wetted, compressed air below the bubble point pressure is passed into one side of the film filament (the water producing side). Due to the surface tension of the liquid in the film hole, there is no obvious air flow through the wet film hole except for a very small amount of air through the diffusion effect. If the membrane is defective or the membrane filament is broken, a large am...