[Vwdiesel] Waste Vegetable Oil

[Rolf Pechukas]

OK, I'm getting a bunch of questions about WVO
here's what I said to Val and Nick:

I filter through blue jeans ('sock' filters - cut off the legs, sew  
up the cuffs)
denim makes a good @ 5 micron filter
many legs into one lank, I pour raw WVO through the BJ filters and  
let it settle, warm (80-90° - I use the sun for this, but if you  
don't have a sunny window, heat tape wrapped around tank, or similar,  
will do same thing) for at least a day, although frequently for weeks
you not only need to filter, you need to 'dewater'
settling warm allows invisible microdroplets of water to fall to the  
bottom
decant from @ 8" up - NOT from the bottom
leave the creamy water-rich WVO on the bottom - it attracts more  
water to it - the richer this cream layer gets the better your tank  
will dewater
that's it

couple pictures here:
http://wvo.4u2bu.org/

and a great site here:
http://biodiesel.infopop.cc/eve/ubb.x/a/frm/f/159605551

Rolf in MA



> Rolf,
>
> Ok, I guess this is getting more complicated than I originaly  
> thought. But, not more than I can handle. What all is involved in  
> "proper filtering".
>
> The Idea is going to be a two tank system, using engine coolant as  
> the heater for the WVO. What do you use for the switch between the  
> two? I'm thinking about a Ford dual tank solonoid. They are only  
> about $20.
>
> Tony Hoffman
>
> ----- Original Message ----- From: "Rolf Pechukas" <rbp at 4u2bu.org>
> To: <vwdiesel at vwfans.com>
> Sent: Saturday, March 31, 2007 3:53 PM
> Subject: Re: [Vwdiesel] Waste Vegetable Oil
>
>
>> I don't run it straight but mix it with my diesel.  I try not to
>> run it when
>> the temp gets below 50 degrees F. Hopefully this year will be the
>> year I
>> actually make some bio. I have about 50 gallons of wvo to use.
>>
>> Nick
>
>
>
> freezing point?
> you mean gelling point?
> it totally varies depending on the quality of the grease
> I've had stuff that was fully liquid in the dead of winter, and stuff
> that had a hard time pouring in the middle of summer
>
> I run WVO straight in a 2-tank system
> doesn't matter much whether the gel point is 30°f or 80°f if you're
> heating it to 160°f
>
> filtering it properly removes a lot of the heavier fats that tend to
> gel up
>
> Rolf
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