METHOD FOR MEMBRANE INTEGRITY TEST USING REDUCTION OF SURFACE TENSION

摘要

PURPOSE: An integrity testing method of a film using a surface tension reduction is provided to prevent the treated water quality degradation due to the damage of a film by easily discovering the damage of film when cleaning a polluted film with chemical. CONSTITUTION: An integrity testing method of a film using a surface tension reduction comprises the following steps. The medicine reducing the surface tension of the water is mixed with the water and the test solvent is made(100). The test solvent in which the surface tension is reduced than the water is injected into a filter film module(200). In the filter film module, the source water supply valve and filtered water exhaust valve are closed except for the pneumatic pressure feeding valve and air exhaust valve(300). The pneumatic pressure feeding valve gives and closes the pneumatic pressure(400). The change of the pneumatic pressure is measured after a predetermined time in advance(500). The damage of the film is determined by comparing with a predetermined standard value(600).