[Digestion] Sulphur levels

Arturo Ávalos-Longoria afal2906 at gmail.com
Fri Mar 1 10:44:53 CST 2013


Interesting point of view, Anand.

But can we get electric energy from it?


2013/2/27 Anand Karve <adkarve at gmail.com>

> Dear biogas workers,
> Sulphur is generally measured in the flue gases. From this point of
> view, fecal matter of ruminents would produce much less sulphur if it
> is burned directly. It is my estimate that dung gives about 3600
> kcal/kg if burned, whereas one gets only about 600 kcal, if one uses
> only methane produced from the same quantity of dung. I am quite sure
> that one can design machines which can dewater dung by using a filter
> press and convert the solids into briquettes. In a relatively dry
> country like Mexico, one may be able to dry the briquettes under open
> sky.
> Yours
> A.D.Karve
>
> On Thu, Feb 28, 2013 at 12:33 AM, Arturo Ávalos-Longoria
> <afal2906 at gmail.com> wrote:
> > Hello everyone.
> > We are in Mexico and we install units to generate electricity with
> biogas.
> > To reduce the sulphur in the gas, we oxidyze it with good results,
> mainly.
> > But there are are 3 sites, with extremely high sulphur levels (70, 10
> and 5
> > k ppm!) with no results. The methane levels are OK for two sites (55-60%)
> > and bad for one (45). If we increase the air injection, the level drops,
> > with a little increase of oxygen in all sites.
> >
> > The digesters are lagoon type and they receive cow manure.
> >
> > Any suggestion is appreciated.
> >
> > Regards,
> >
> > --
> > Arturo
> >
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> >
> >
>
>
>
> --
> ***
> Dr. A.D. Karve
> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>
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> for more information about digestion, see
> Beginner's Guide to Biogas
> http://www.adelaide.edu.au/biogas/
> and the Biogas Wiki http://biogas.wikispaces.com/
>
>


-- 
Arturo
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