Author Topic: Water retaining gel for drying bio  (Read 6663 times)

Offline knighty

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Re: Water retaining gel for drying bio
« Reply #15 on: December 27, 2014, 02:38:01 AM »
so... haven't made any bio yet

but why can;t you just heat bio to dry it like we do veg oil ?

Offline John Galt

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Re: Water retaining gel for drying bio
« Reply #16 on: December 27, 2014, 04:53:25 AM »
I've confirmed the effectiveness of the water absorbing polymer gels using a carbide manometer to accurately test for water content.  The water absorbing grains easily bring the BD to less than 250ppm H2O which is good enough for blending with petrol fuels that further inhibit water retention.

Offline John Galt

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Re: Water retaining gel for drying bio
« Reply #17 on: December 27, 2014, 04:57:03 AM »
so... haven't made any bio yet

but why can;t you just heat bio to dry it like we do veg oil ?

If you heat it long enough and bubble dry air through it you can get it below 500ppm.
The gels are best used for final 'polishing' to reduce water content to less than 200ppm.
That's way below what can be detected with the 'hot pan test' used for VO.

Offline Julian

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Re: Water retaining gel for drying bio
« Reply #18 on: December 27, 2014, 04:02:23 PM »
John ... any chance of putting a wiki page together on your setup?

I'm happy to help with the wiki markup, page layout and any diagrams required.
Used Cooking Oil Collection website ... http://www.surreyusedcookingoilcollection.palmergroup.co.uk

Offline John Galt

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Re: Water retaining gel for drying bio
« Reply #19 on: December 28, 2014, 04:00:41 AM »
John ... any chance of putting a wiki page together on your setup?

I'm happy to help with the wiki markup, page layout and any diagrams required.

I don't have a clue how to convert what I've posted in this discussion into a 'wiki page'.  You're more than welcome to copy what I've posted here to another place on the BioPowered site if that would be useful to others.

Offline John Galt

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Re: Water retaining gel for drying bio
« Reply #20 on: December 28, 2014, 04:03:18 AM »
... if you insist on making your bio wet to start with... 

Is that what folks on this side of the pond call water washing?

Offline Jonzeyboy43

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Re: Water retaining gel for drying bio
« Reply #21 on: December 28, 2014, 10:57:18 AM »
John, an ongoing debating over here about which is best water washing and drying or de-meth and settle. Both have merit and I donboth at different times of the year

Offline RichardP

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Re: Water retaining gel for drying bio
« Reply #22 on: December 28, 2014, 11:53:13 AM »
I used one of these for the gel

http://www.ebay.co.uk/itm/290713670527?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Hi Keith, what sort of flow rate are you using through that? Can you see a noticeable difference from just drying normally?

Offline K.H

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Re: Water retaining gel for drying bio
« Reply #23 on: December 28, 2014, 08:57:28 PM »
I used one of these for the gel

http://www.ebay.co.uk/itm/290713670527?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Hi Keith, what sort of flow rate are you using through that? Can you see a noticeable difference from just drying normally?
I didnt get too far, the pump on the wash tank was too powerful as i use it for transferring, i think if using a pump it would need a few passes, I didnt continue as touch wood the bio has always been perfectly clear after drying