Chris,
I'm glad to hear from you. Sorry it took me so long to respond to your
original post. Your post caught my interest. I did my "tests" and tried to
respond, but I have been having problems with my ISP and little time to
resolve them.
I have plenty of glycerine cocktail.
My interest was not only in de-watering my WVO and neutralizing FFAs,
but in lowering the pH of my glycerine, which I compost.
A few questions:
- How do you mix the WVO and glycerin?
- Is the settling time similar to that of glycerin from BD?
- Do you have a settling tank specifically for settling the glycerin from
the
WVO?
Nice website. http://www.freewebs.com/easybiodiesel/
Keep up the good work!
Tom
----- Original Message -----
From: "Chris Tan" <[EMAIL PROTECTED]>
To: <sustainablelorgbiofuel@sustainablelists.org>
Sent: Tuesday, December 11, 2007 3:57 PM
Subject: Re: [Biofuel] Good use for glycerine
> Hi Tom,
>
> Your results seems to be a mystery to me too.
>
> Did the glycerine batch you used for the cone-shaped settling tank the
> same
> as that which you used for the mini-batch? Different batches of glycerine
> would have different amounts of catalyst.
>
> What we do is use atleast 10/90 weight ratio. 10kg of glycerine for 90kg
> of
> waste oil. It is possible to bring the ffa level to zero if you use large
> amounts of glycerine (if you happen to have accumulated large amounts).
>
> Best regards,
> Chris Tan
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> Thomas Kelly
> Sent: Monday, December 10, 2007 11:53 AM
> To: sustainablelorgbiofuel@sustainablelists.org
> Subject: Re: [Biofuel] Good use for glycerine
>
> Hello,
>
> On Oct 5,2007 Chris Tan suggested using the glycerin cocktail to de-water
> WVO and to neutralize FFAs. (Post included below).
>
> This made sense to me. When I titrate WVO after it has been
> circulating
> in the reactor and allowed to settle, it is always slightly lower than
> when
> titrated before loading. I attribute this to the presence of some glycerin
> residue from the previous batch. (It never dawned on me to use the
> glycerine
> to neutralize FFAs.)
>
> After reading Chris' post I tested the hypothesis by mixing (shaking)
> 0.5L WVO with 10 ml of glycerin cocktail. I did two samples. Both titrated
> a
> bit less than the WVO alone ( ~ 2.9g KOH/L vs 3.2 g KOH/L).
>
> I then set up a small cone-shaped settling tank and mixed (paint
> stirrer on an electric drill) 20L of the same WVO with 500ml of the same
> glycerin cocktail. The next day the WVO still titrated at 3.2 g KOH/L. I
> titrated it again; same result.
>
> Chris' post make seems to agree with my own experience. It also seemed
> to
> be corroborated by my "mini test", and it seems to make sense.
>
> Questions:
> 1. Is there any reason the alkaline glycerin would not neutralize FFAs?
> 2. Why didn't it neutralize FFAs in my larger (settling cone) test?
> (The settling cone is now in use.)
>
> The FFAs would be neutralized as soaps which, given time would settle
> out with the glycerin. WVO with high FFA also tends to hold water.
> Treatment
> with glycerin held some promise for treating the cubie (18L container) of
> marginal WVO that I get on occasion.
> Not only should the glycerin neutralize the FFAs, but the FFAs should
> lower the pH of the glycerin making it more environmentally friendly(?)
>
> Thoughts, comments, suggestions appreciated,
> Tom
>
> [Biofuel] Good use for your glycerin cocktail
> Christopher Tan
> Fri, 05 Oct 2007 21:17:05 -0700
> Here's a good use for your glycerin cocktail before finally giving it
> away.
> My father came up with the idea that you can use the glycerin cocktail to
> dry your waste oil. And it works. Glycerin is hygroscopic enough to pull
> moisture out as it settles down so you wouldn't have to heat or boil the
> oil. And as a bonus, it neutralizes the ffa's in the waste oil. Most of
> the
> catalyst end up in the glycerin cocktail so it neutralizes the ffa's.
>
> Best,
>
> Chris Tan
>
> P.S.
> Kindly check out my personal website
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