My glycerine sets up into a gel fairly quickly upon draining. Is there something to mix with it to take it back to a solution? I would like to spread it on marginal hay I'm feeding my cows.
I've always been taught that glycerin made from NaOH should not be used for animal feed. If you use KOH in your biodiesel, the animals will love it... but it shouldn't ever get too firm to flow.
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I make small amounts of biodiesel using KOH. The last time I made biodiesel, I drained the glycerin layer then demethed. I got a second glycerin layer to form after demething. The density of my second glycerin co-product was about 0.944 grams per milliliter. But the density of glycerol is supposed to be 1.26 grams per milliliter. I think the "glycerin " layer is a mixed co-product containing methanol, water, soap,residual catalyst, glycerine and maybe mono and diglycerides. It isn't pure glycerin. I checked the pH of my second glycerin layer with a test strip mixing distilled water and glycerin layer 50:50, the pH was equal to or greater than 10. Maybe adding pure glycerin to cattle feed is fine. But the crude glycerin from biodiesel production isn't pure. It has NaOH or KOH in it also (poison) it has some methanol in it also (poison). Maybe the cows like it but it may have detrimental long term effects on them. I wouldn't put it on my salad.
Yep, water is the way to go.
As far as feeding the cows NaOh glycerin, its no problem according to any literature I have read, including this paper; http://www.regional.org.au/au/gcirc/1/241.htm
Simple schematic for a pump and heater control with a high limit
Sensor for the biodiesel/glycerin layer
Thanks for the input fellas! I believe that I don't have much methanol in my glycerine since it hardens so quickly. My oil is a 2. I use 10% methanol, 2% 30% methoxide. It works great in small batches, I just have to figure out how long to mix on the larger batches.
Thanks For the link Jon,
I think Wesley's concerns are still valid, though NaOH and KOH are not poisons, the pH effects on mouth and digestive tract would be something to study longer term.
What I find a little perplexing is that the definition of 'CRUDE' seems to cover so many mixtures.
Presumably most of us don't centrifuge, or even acidulate... so 'crude' to most of us is about 50% glycerol before de-mething, and 60% after ?
No waste but what we make...
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