[Digestion] AD of rabbit manure

[Luís Ferreira]

Hi Peter,

Did you add the Ca(OH)2 in the feedstock tank or in the digester?
What is the pH of the digester content?

Perhaps you don't need to use anti-foaming agents!

Luís Ferreira
----- Original Message ----- 
From: "Peter Allison" <pmallison at optusnet.com.au>
To: <digestion at listserv.repp.org>
Sent: Friday, October 26, 2007 9:45 AM
Subject: Re: [Digestion] AD of rabbit manure


> Hi All,
> I'm at present digesting rabbit manure in a one ton pilot plant to assess
> gas output and the quality of the spent supernatant. I introduced about
> 10kgs of calcium hydroxide Ag-lime to increase pH after acidification. The
> plant is producing plenty of methane and biological activity but also 
> plenty
> of foam, similar to what they use for extinguishing liquid fuel fires. 
> Does
> anyone know of an organic based de-bubbling fluid I could use to collapse
> the foam discharge? It's fouling my gas lines and creating havoc.
> Stand back! I think she is ready to blow!
> Help!
> PA
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