Hi,
We've recently switched from PBW to Caustic in hope of better results and more accurate cleaning. At the end of the PBW wash cycle on an FV the tank came out spotless but it's what we don't see that was worrying us so we switched to caustic.
Concentration is between a PH of 13-14 at 160F (we've let a sample cool before taking PH reading.)
After a few wash we realized that the krausen line was still in the tank and needed a light brush to take it off, this was after an hour recirc. So next wash we decided to monitor the PH at every 10 minutes. Well within the first 10 mins the PH dropped to 6. I'm sure this affects the effectiveness of the caustic to do its job properly.
Why is that? We made sure there wasn't any C02 remaining by flushing the FV with compressed air, we also let it open for at least 30 minutes in case of any remaining C02, then we proceeded to the wash cycle.
Could it be because there was "some" C02 left in the FV? Could a very small amount cause such PH swing?
Maybe it's our water?
Any suggestions?
Thanks!
We've recently switched from PBW to Caustic in hope of better results and more accurate cleaning. At the end of the PBW wash cycle on an FV the tank came out spotless but it's what we don't see that was worrying us so we switched to caustic.
Concentration is between a PH of 13-14 at 160F (we've let a sample cool before taking PH reading.)
After a few wash we realized that the krausen line was still in the tank and needed a light brush to take it off, this was after an hour recirc. So next wash we decided to monitor the PH at every 10 minutes. Well within the first 10 mins the PH dropped to 6. I'm sure this affects the effectiveness of the caustic to do its job properly.
Why is that? We made sure there wasn't any C02 remaining by flushing the FV with compressed air, we also let it open for at least 30 minutes in case of any remaining C02, then we proceeded to the wash cycle.
Could it be because there was "some" C02 left in the FV? Could a very small amount cause such PH swing?
Maybe it's our water?
Any suggestions?
Thanks!
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