The futility of 1u filtering

[julianf]

I fill up from ex MOD jerry cans.  They have a clip on nozzle, which i keep in a plastic bag in the car.

That nozzle is glazed with a glyc coloured film, as is the inside of the plastic bag.


Now this could be oxidised (?) bio, or it could be gyc.  Im thinking if its bio, then it would still be there if i water washed, but, if its glyc etc. then im wondering if water washing or fuging would free me of it.

I cant think its great for it to go in the car.

[dgs]

if you water wash (aggressivley) until the water is clear there will be no glyc left. I know this is a pain as then the bio has also to be dried, I have dry washed but have never been happy with it.

Having said that , a bio friend from the next village has been experimenting with a slightly different way of dry washing, his 50/50 shake up's are the clearest I have ever seen. I am going to try this with my next batch and report.

[Twenty4Seven]

I fill up from ex MOD jerry cans.  They have a clip on nozzle, which i keep in a plastic bag in the car.

That nozzle is glazed with a glyc coloured film, as is the inside of the plastic bag.

Now this could be oxidised (?) bio, or it could be gyc. 

Yep, I get exactly the same reddy-brown deposit on my filling nozzle too - and also in the bag it's kept in.

I'm pretty certain it is oxidised bio, so water washing won't prevent it.

[julianf]

As an 'experiment' today, i bought the nozzel in and tried to wash it.

Glyc would come off very easily.
Bio (and bio derivatives) would be harder?

This stuff is harder to get moved than bio.  Even with my usual selection of cleaning products, it does not dissolve.

Its not like its hard - you can 'push' (smear) it easily enough, but its far from water solvable.

(so not glyc then)


I wonder if i would get the same residue on the nozzle if i water washed?  If its just oxidised bio, then you would expect so, but if its some sort of contaminant that (somehow, even though its not water soluable), water washing would remove, i guess things would be different.

[Jmg]

Might explain why my multipla is so grumpy this week after faultlessly running bio for the last. I was a bit wary using the bottom of my bio barrel but I eventually decided it should all be OK as it had all been through the filter.
Well it was that or pay for diesel...

[dgs]

Does bio really turn brown when oxidised? Maybe, but I've never seen this happen.
I try to keep everything really tidy in my bio cave, wiping up small spills etc. However at the back of my wash tank where over the last 2 years a small amount of bio has run down, it has oxidised, gone hard, not sticky and continually gets heated up as batch after batch is de-methed and washed. This hard bio is transparent, and can virtually be peeled off, but it is not glycerol coloured.

[Twenty4Seven]

OK, this piece on high IV bio is from the JTF site (spit) but it does mention bio turning reddish on oxidation...

• "This isn't exactly scientific, but you could try painting a thin film of your biodiesel on a piece of glass, or any clean, smooth surface, along with a thin film of the oil you made it from, see if it starts getting sticky to the touch and dries. Pour about 1/8" (2-3mm) of your biodiesel into an uncovered shallow dish and keep an eye on it, watch for it turning a reddish colour, darker and more viscous."

Perhaps a few of us could try this? Note that it is feedstock specific if it does depend on the iodine value.

Nick

[Julian]

Perhaps a few of us could try this? Note that it is feedstock specific if it does depend on the iodine value.

Nick

Like that idea, Nick.

We have discussed having an experimental section on the wiki and something like that would lend it's self to having a page where people could document heir findings.

Are members interested in a collective experiment and a page where we can collate results?

[THE-DOLPHIN]

Yes I would be I am able to help with costs oil and bio if needed hope to hear from you all soon

[dgs]

I would certainly be interested in that.

[Julian]

I surprise my self some times!

I've somehow managed to create a new category and get it indexed on the wiki front page ... more by luck than judgment I recon!



I've started this page ... http://www.biopowered.co.uk/wiki/Biodiesel_and_oil_oxidisation_collaborative_trial

Welcome suggestions on page layout.

I'd suggest a description of what people need to do followed by a table that can be filled in by participants detailing any variations from the method, observations and dated results ... anything else?