Has not been a problem in the past, but we now find ourselves with a batch of contaminated hydrosol. Checked with the supplier, they do not microbial test their hydrosols, and they are not preserved.
We have Zero yeasts/fungi, but 5 CFU/cm2 total plate count bacteria. Issue is that the hydrosol is now filled in 100 mL bottles. (I know, bulk supply should have been tested before filling)
Question now is, has anyone had experience with pasteurising hydrosols? Any suggestions appreciated.