[Digestion] water column CO2 scrubbing

[Warren Weisman]

If you look here: 

http://www.sgc.se/Rapporter/Resources/Biogasinfo07.pdf

about half the way down is a water column scrubber for
removing CO2. The H2S is then removed with an iron
sponge and periodically released into the atmosphere.
The wastewater treatment plant here in Eugene, Oregon,
which Paul will be visiting during his trip here, uses
the iron sponge method. 

It just seems to me, in my usual tendency to
over-simplify everything, that a column of rainwater
could be used to do the same as this machinery, with a
simple sensor to tell you how much rainwater was
flowing and tell you how much biogas to release into
the column. 



--- christian rodriguez <chris_rhulerig at yahoo.com>
wrote:

> Hello Warren.
> 
> In some cases, CO2 Scrubbers may help, not exactly
> to
> reduce CO2, but to remove directly some extra Ca+
> from
> manure. In hens layer farms, the hight qoute of Ca+
> in
> the primary sludge, may precipitate with CO2 as
> carbonate inside the digestor. But, of course, you
> need to eliminate H2S before you compress it (some
> non
> oxidating method, so you avoid the chance of getting
> O2 in your feed.
> 
> Greeting from Peru
> 
> ************************///******************
> 
> --- paul.harris at adelaide.edu.au wrote:
> 
> > G'day Warren,
> > 
> > You won't get enough energy from the roof runoff
> to
> > run the scrubber,
> > let alone a compressor (unless you have a very
> > large, very tall building
> > and a LOT of rain - as in England recently!).
> > 
> > Biogas burns quite well with CO2 in it, so why the
> > extra expense/worry
> > of scrubbing?
> > 
> > All the best,
> > HOOROO
> > 
> > Warren Weisman wrote:
> > > 
> > > Just thinking out loud, is anyone familiar with
> > any
> > > experiments where rainwater runoff from a
> > building(s)
> > > is being used to scrub the CO2 from biogas?
> Seems
> > like
> > > the falling water could also drive a compressor.
> > > 
> > > Make biogas when it's sunny, clean it and
> compress
> > it
> > > when it's raining.
> > > 
> > > 
> > >
> >
>
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