From: mark@ehle.homelinux.org
Date: Mon Oct 03 2005 - 07:35:55 PDT
That is my biggest worry - that no restaurants will want to "play". I know that
our local McDonalds uses a system whereby they don't ever handle the oil
directly. But, I have seen a few restaurants around here that use a dumpster
for their old oil. I will be asking them.
As far as the eco-friendlyness, there is not that much lye involved, and most
people simply let the ehtanol evaporate out of the glycerin. The result is
completly biodegradeable, so I have read.
There are a whole lot of web sites dealing with the issue and they can explain
if much better than I can...
http://journeytoforever.org/biodiesel_make.html
http://www.localb100.com/
http://www.veggieavenger.com/
...are a few.
Cheers -
Mark
Quoting "Hutterer, John (MPAU)" <john.hutterer@smiths-medical.com>:
>
>
> Mark,
>
> Thanks for the information. It seems that the process can (with the
> addition of acid and a distillation unit) be made "eco friendly". On the
> other hand, I wonder how many people actually go through those
> processes, and how many just dispose of the by-products in the trash. An
> interesting question, although perhaps not one of great importance,
> unless the trend to using recovered cooking oil becomes a serious
> effort. They just ran an article in the local paper about a company that
> installs 400 gallon tanks in restaurants, one for clean oil and one for
> used oil. The company sends a truck around, as needed, and pumps out the
> old oil, while refilling the fresh supply tank. It's all done with a
> self-contained tank truck that costs about $150,000. The restaurants
> love it because there is no need to handle hot grease anymore. The
> article did not mention what the company does with the used oil.
>
> John
>
>
> John Hutterer
> Sr. Eng. Lab Tech.
> Smiths-Medical (Deltec)
> 651-628-7107
>
> -----Original Message-----
> From: Military Vehicles Mailing List [mailto:mil-veh@mil-veh.org] On
> Behalf Of mark@ehle.homelinux.org
> Sent: Monday, October 03, 2005 9:11 AM
> To: Military Vehicles Mailing List
> Subject: Re: [MV] Diesel & cooking oil
>
> My last statement was a little ambiguous.
>
> The fatty acids in the oil are broken free (cracked) from the glycerin
> and are bonded with the methanol in the presence of the catalyst, sodium
> hydroxide (lye). The lye and whatever excess methanol fall to the bottom
> of the reaction vessel with the glycerin. The lye can be neutralized
> with acid, and the methanol can be recovered in a still. The resulting
> glycerin can be composted or used for degreaser. Some folks make it into
> soap.
>
>
>
>
> Quoting mark@ehle.homelinux.org:
>
> > Yes - In a complete reaction, that is exactly what it does.
> >
> > Quoting "Hutterer, John (MPAU)" <john.hutterer@smiths-medical.com>:
> >
> > >
> > >
> > > Mark,
> > >
> > > Just a point of curiosity. If the methoxide is so toxic and
> > > dangerous, what do you do with it once you have made your fuel? Does
>
> > > it break down somehow in the reaction, or is it a toxic by-product
> > > that has to be disposed of?
> > >
> > > John
> > >
> > >
> > > John Hutterer
> > > Sr. Eng. Lab Tech.
> > > Smiths-Medical (Deltec)
> > > 651-628-7107
> > >
> > > -----Original Message-----
> > > From: Military Vehicles Mailing List [mailto:mil-veh@mil-veh.org] On
>
> > > Behalf Of mark@ehle.homelinux.org
> > > Sent: Monday, October 03, 2005 5:52 AM
> > > To: Military Vehicles Mailing List
> > > Subject: Re: [MV] Diesel & cooking oil
> > >
> > > Also, when lye is mixed with methanol, the resulting chemical,
> > > methoxide, is exeedingly caustic and can eat your skin without you
> > > knowing it, because it quickly kills nerve endings. Nasty stuff. It'
> > > already eched the glass in my blender after just two test batches.
> > >
> > > A good many biodiesel sites recommend that you build your processor
> > > in such a way that you never come into contact with methoxide,
> > > including the vapor.
> > >
> > > I am currently building a 50-gallon biodiesel processor out of an
> > > ancient electric water heater to make fuel for my home oil furnace,
> > > and maybe for my M35. As I understand it, biodiesel does not have to
>
> > > be as clean for use in a furnace as it does in an engine. My plan is
>
> > > just to make it and store it in my current heating oil tank, along
> > > with what the oil company pumps in there. They are supposed to be
> > > compatable in any ratio.
> > >
> > > My only worry is that after I get good at it, the government
> > > (spurred on by the petroleum industry) will decide to make used
> > > cooking oil a hazardous chemical, and require that all restuarants
> > > hire only licensed waste haulers to dispose of it.
> > >
> > > Mark
> > >
> > > --------------
> > > Quoting Ryan Gill <rmgill@mindspring.com>:
> > >
> > > > At 5:43 PM -0500 10/2/05, MV wrote:
> > > > >Unless I'm mistaken, the only way you can blind=20 or kill
> > > > >yourself with methanol is to drink it.
> > > >
> > > > Or breathe the vapors or absorb it through your=20 skin. We're
> > > > talking
> > >
> > > > pure, methanol here, not a=20 solution of methanol and water.
> > > >
> > > >
> > > > --
> > > > --
> > > > Ryan Gill rmgill@SPAMmindspring.com
> > > > ----------------------------------------------------------
> > > > | | | -=3D=3D----
> > > > | O--=3D- | | /_8[*]=B0_\
> > > > |_/|o|_\_| | _________ | /_[=3D=3D=3D]_\
> > > > / 00DA61 \ |/---------\| __/ \---
> > > > _w/|=3D_[__]_=3D \w_ // [_] o[]\\ _oO_\ /_O|_
> > > > |: O(4) =3D=3D O :| _Oo\=3D=3D=3D=3D=3D=3D=3D/_O_ |____\
> > > /____|
> > > > |---\________/---| [__O_______W__] |x||_\ /_||x|
> > > > |s|\ /|s| |s|/BSV 575\|s| |x|-\| |/-|x|
> > > > |s|=3D\______/=3D|s| |s|=3D|_____|=3D|s| |x|--|_____|--|x|
> > > > |s| |s| |s| |s| |x| |x|
> > > > '60 Daimler Ferret '42 Daimler Dingo '42 Humber MkIV (1/3)
> > > > ----------------------------------------------------------
> > > >
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