[Digestion] Poultry Manure - Layers - Answer to Marina

[T-ReX]

Hello Manina,
To add on to Randy's comments, poultry AD is indeed problematic at the
feasibility stage.
The amounts of protein in the manure is an issue. It will lead to high
ammonia. You need a good source of off-farm materials, like grease trap
waste. That might be difficult depending on where you are.
Secondly, you will have to plan for digestate storage. I dont know what
manure collection system you are using. Its harder to answer you correctly.
As Randy indicated, for broilers, its more difficult, as you have packed bed
manure and have to store the manure in another building.
The biggest problem with layer manure is the calcium carbonate supplements
and the grit fed in the ration of the layers. They end up in the digester,
clog pipes, break pumps, from struvite, etc.... You need a pre-treatment
system that makes the system pretty costly and complicated. Unfortunately, I
am not aware of any system that runs on layer manure. I've been tracking
projects, but most of them were for broiler manure.


From: Marina Solanas <marinafsolanas at gmail.com>
> To: digestion at lists.bioenergylists.org, Digestion at bioenergylists.org
> Date: Thu, 5 May 2011 02:10:49 -0300
> Subject: Re: [Digestion] Digestion Digest, Vol 9, Issue 1
> This is my first mail to the list. I found lots of useful information.
> Thanks to all!
> I´m working on a project of a biogas plant at a laying hens farm. There are
> 90,000 hens and their manure is supossed to produce at least 648 m3 of
> biogas.
> Do you know a low-inversion method for transporting the manure from the
> sheds to the biogas plant? What do we need to filter to get the manure in
> the biodigestor? Is it really necessary to mix the manure with any substrate
> with a good C/N index?
> Thank you again for your help!!!
>
>
> Date: Wed, 4 May 2011 12:34:21 +0200
> From: "Randy Mott" <randymott at ceeres.eu>
> To: "'For Discussion of Anaerobic Digestion'"
>     <digestion at lists.bioenergylists.org>
> Subject: Re: [Digestion] Digestion of Chicken Dung
> Message-ID: <002d01cc0a46$d4936640$7dba32c0$@ceeres.eu>
> Content-Type: text/plain;    charset="us-ascii"
>
> Our Danish technical guys are very familiar with it. Some comments:
>
> 1. It is 6% nitrogen, so you have to have abundant low-nitrogen material as
> substrates to balance the nitrogen-to-carbon ratio.
>
> 2. The schedules for chicken producers cleaning out their buildings vary
> and
> the seasonality can be a real problem. This stuff is difficult to store at
> a
> biogas plant and feed in over time on a more steady schedule needed for
> biogas.
>
> 3.  Local producers often exchange bedding for chicken manure, so the
> producers get something for it from the farmers in exchange for using it as
> fertilizer. If this occurs, it is tough to make the economics work, since
> the chicken guys are getting generally paid in kind by farmers.
>
> Randy Mott
>
>
> Randy M. Mott
> President
> CEERES Sp. z o.o.
> Ul. Postepu 1
> 02-676 Warsaw
> +48 22 843 11 22
> randymott at ceeres.eu
> www.ceeres.eu
>
>
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