I am currently doing my phd studies on high salinity digestion under the
supervision of David Lewis and Paul Harris. I am currently digesting marine
micro algae at a salinity of 7% (2 x seawater) I am getting good gas production
and results loom positive. I have undertaken DGGE community profiling of the
bacterial community and have isolated several high salinity methanogen bacteria
that tolerate high salinity. I will be running several bio methane potential
assays looking at co- digestion of glycerine bi-products from biodiesel
production. I will keep you informed of my results and journals were results
will be published.
Cheers Andrew
Sent from my iPhone
On 05/01/2012, at 1:45 AM, Douglas Renk <[email protected]> wrote:
> Has anyone demonstrated the effect of introducing marine anaerobes highly
> toleratant of sodium into glycerin by-product enhanced digesters? Sodium may
> still be of concern for land application, but perhaps the digester could
> remain stable. I recall some studies about 20 years ago with Chynoweth at IGT
> for inoculum suited for sea kelp digestion.
>
> Any experience with this may greatly help our biogas industry with
> co-digestion of biodiesel glycerin. I find the industry resistant to move
> away from sodium hydroxide catalyst.
>
> Thanks,
> Doug Renk
>
>
>
> From: Steve Verhey <[email protected]>
> To: [email protected]
> Sent: Wednesday, January 4, 2012 8:24 AM
> Subject: Re: [Digestion] slurry from Potassium hydroxide catalyzed glycerin
>
> We have fed post-biodiesel potassium-glycerin to a large dairy digester. Our
> reasoning for using KOH instead of NaOH is the same as yours: K+ is a
> nutrient, Na+ is a pollutant. We don't have numbers, but I don't see why the
> recovery of K wouldn't be quantitative -- in this case, what goes in, comes
> out.
>
> Date: Wed, 4 Jan 2012 10:15:15 +0200
> From: [email protected]
> To: [email protected]
> Subject: [Digestion] slurry from Potassium hydroxide catalyzed glycerin
>
> G'day All,
>
> We are looking to use our glycerin byproduct from biodiesel production in our
> digester. The question arises as to the sodium influence on the liquid
> slurry. Does anyone have any experience in this area? We are thinking that
> although potassium hydroxide is more expensive as a catalyst, it will produce
> a better quality fertilizer. Does anyone know how this would affect the end
> NPK reading of the fertilizer?
>
> Blessings,
> Wayne
>
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> for more information about digestion, see
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> and the Biogas Wiki http://biogas.wikispaces.com/
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for more information about digestion, see
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