Paul,
On 11/1/2012 1:32 AM, Paul Muthui wrote:
Good Day All,
I read in an article that increasing the surface area inside the
biogas digester (e.g. by introducing vertical structures),
increases the population bacteria population and consequently more
gas production. By what percentage does this increase gas
production? And what's the most effective way to do it?
Methanogens are part of a complex ecology that likes to sustain itself
by forming biofilms on any available surface. However, for most kinds
of digestion-- that is, at any percentage of solids that one might
"choose," rather than having it /imposed/ by the high water content of
the substrate-- there is plenty of surface for the biofilms to form.
Adding surface to the inside of a digester, then, is almost
exclusively done where the dilution of the incoming substrate is
considerable (1%-2% or less). What happens where such substrates are
digested with sufficient HRT is that floating consortia of microbes
develop. These a bit like sponges, and are often referred to as "flocs".
You may be able to learn more by searching for [biogas dilute flocs]
and adding any reference to the substrate you have in mind.
d.
--
David William House
"The Complete Biogas Handbook" |www.completebiogas.com|
/Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com
|
|
"Make no search for water. But find thirst,
And water from the very ground will burst."
(Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77)
http://bahai.us/
|
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