Reasons for Odor from Laboratory Ultrapure Water System

Core Causes and Key Points for Addressing Odors in Laboratory Ultrapure Water Systems:

I. Filter Cartridge Failure

• Activated Carbon Saturation: Decreased adsorption capacity, residual chlorine and organic matter → Irritating or putrid odor

• Poor Installation/Sealing: Unfiltered water bypass → Odor contamination
  

II. Storage Tank Contamination

• Microbial Growth: Bacteria and mold on the inner wall → Musty or putrid odor

• Clogged Vent Valve: Negative pressure draws in external contaminants → Secondary contamination
  

III. Piping Problems

• Inferior Piping Materials: Leakage of plasticizers → Plastic odor

• Long-Term Lack of Cleaning: Scale and biofilm shedding → Odor, turbidity
  

IV. Sudden Changes in Inlet Water Quality

• Sudden Increase in Residual Chlorine: Exceeding the activated carbon's capacity → Chlorine odor

• Impurities after Piping Repair: Sediment, rust → Metallic odor
  

V. Improper Operation and Maintenance

• Lack of Disinfection: Internal biological contamination

• Contamination during Water Dispensing: Hands and containers carrying bacteria → Immediate odor
  

VI. Troubleshooting Order

Filter Cartridge → Storage Tank → Piping → Inlet Water Quality → Maintenance Records

VII. Key Points for Handling

• Replace filter cartridges (especially activated carbon) on time

• Regularly disinfect the storage tank and flush the piping
  

• Monitor residual chlorine in the inlet water; pre-treat if necessary
  

• Establish and implement a daily/weekly/monthly maintenance schedule