Andrew,
Did you do a wash
test ("shake test") before washing the biodiesel?
Do you perform
quality tests on your biodiesel?
(See JTF: "Quality Testing")
An emulsion at any point
in the wash, even "minor emulsion problems in the first
wash that I could handle pretty good with hot water or some vinegar."
suggest processing problems. I lean towards incomplete reactions, as
glycerine contamination and soaps produced during the reaction would
produce emulsions or a thick soap layer in the wash test.
I've only had emulsions
occur in the wash, after having good wash test results, when I've had incomplete
reactions (BD failed quality tests).
The problem may be an incomplete reaction.
Quality test will tell.
Why did it show up in 5th
wash, not first or second ....
I could only speculate.
Let me know how the
quality test goes,
Tom
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