What causes DI water resin beds' lifespan to suddenly decrease?

The lifetime of our DI resin columns recently reduced to less than 1/2 of the cycle times we experienced for the past 5 years. Our vendor believes that CO2 saturation is the culprit, however the water source has remained constant, and I have a hard time identifying a source for the increased CO2. Does anyone have any other suggestions as to what could cause a sudden (overnight) reduction in resin lifetime?

 

[dfmorvan]

Bliff,<br><br>There may be several reasons for cycle reduction, for instance a change of water quality. However I think it's probably a regeneration problem. Please tell me what your system is. How many vessels, resin type, flowrate, regenerant type (what acid), regenerant level, raw water analysis. I'll try to help<br><br>df morvan, Nalco France SAS<br><br><br>&nbsp;