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Old 16th July 2008, 07:18 AM
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Bubble washing
Hi fellas

Just a quick question.
I have been using the Idaho bubble washing tecnique for some time now and i am getting very good results, now and again i find that on top of my bio when bubble washing i get a very thin skin forming on the top, and i dont know what it is, could enybody enlighten me as to what it would be?

Thanking you

Alan Green
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Old 16th July 2008, 08:38 PM
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Re: Bubble washing
Gudday Alan - I think that is a film of Glycerine.

I mist wash first - 2 nozzles about 6 hours over 160L in a 200L drum - just til the fuel starts to clear, then I fill her up with clean water and bubble for about 24 hours - I call it polishing!

The film usually falls out or vanishes through the process.

Nothing to worry about.

Cheers
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Old 16th July 2008, 10:48 PM
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Re: Bubble washing
Agree with Paul. I bubble wash also and get a film, it falls to the bottom of the wash tank once the methanol is out of the bio.
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Old 16th July 2008, 11:54 PM
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Re: Bubble washing
Quote:
Originally Posted by mallcruiser View Post
Gudday Alan - I think that is a film of Glycerine.
Cheers
I don't see how it could be glycerine. Don't you find the glycerine at the bottom after you let the reaction settle?
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Old 17th July 2008, 12:00 AM
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Re: Bubble washing
Gday,I believe it could be soap.Skim some off and wash your hands with it and you may find it cleans your hands.regards westwinds.
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Old 17th July 2008, 12:19 AM
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Re: Bubble washing
The film on top is due to the soaps, held in solution by methanol in the biodiesel, coming out of solution as the methanol evaporates.

The skin breaks up and settles to the bottom of the container.

Regards,
Tony
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Old 17th July 2008, 06:07 AM
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Re: Bubble washing
Thanks guys, greatly appreciated
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