How to deal with high TOC in pure water system?

High TOC is commonly seen in: 1. When the lifespan of UV lamps expires (it is recommended to replace them after 8000-10000 hours); 2. Activated carbon filter cartridge adsorption saturation; 3. The TOC of the incoming water suddenly increases; 4. Biofilm grows in water tanks or pipelines. Suggested solution: Check the usage time of the UV lamp first, and replace it if it has expired; Simultaneously check the service life of activated carbon (6-12 months); If the problem still cannot be solved, engineers can be arranged to perform systematic chemical cleaning.