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Golan,
I have experienced similar
results ..... not quite as dramatic a difference as yours.
I don't know why, but it
could be that as water settles, some acids may settle with it. Heat
definitely helps settle the water out.
About 6 - 8 months ago I
brought home WVO that looked good, but titrated 3.2g lye/L. It also had a
peculiar (bad) smell when heated. I washed a sample of the WVO (w. water)
and dried it. It titrated 2.2g lye/L.
I spoke to the chef at the
restaurant. She told me that the WVO came from a fryer they use to fry
vegetables.
I set up 2 settling tanks
(200+L) one for the restaurant's french fry oil, the other for their veg fry
oil. The veg-fry oil goes in 3 - 3.2 came out 6 weeks later (top 150+ gal)
2.4
Be careful to titrate each
time you use the oil. There may be a gradient as you go down the tank.
(Increasing titration#)
Best
of luck.
Congratulations on the quality tests
Tom
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