[Digestion] Large scale Biodigestion plants - Dry vs Wet

[Terrence Sauve]

Hi Robin,
The dry vs wet debate may re-ignite!

What I would assert for your planned AD system is a fairly wet mixture from
the start. Generally cheaper to keep it the way it comes out of the
digestate pipe. Dry would be nice, but who would come to build your plant
and at what cost?

If you could find resellers of Kompogaz, BECON or Dranco, it would be good
for you. I'm only aware of CEM Engineering that did some AD work in S.
Africa, but its a liquid system.

Have you considered a solid-liquid digestate seperator combined with UF and
flocculation system?
Give us more info on size or scale and amounts of feedstock coming in. If
its still the case for grid connection deadlines in Germany, engineering
firms may be looking for work past that deadline and most of them have an
internationnal portfolio. Foremost, they are always interested to work in
countries where the waste stream is full somewhat free organic waste to
digest - why send to a landfill!

Good luck
Terrence


Today's Topics:
>
>    1. Large scale Biodigestion plants (Jones, Robin (Matomo))
>
>
> ---------- Forwarded message ----------
> From: "Jones, Robin (Matomo)" <RobinJ at brmatomo.co.za>
> To: "digestion at lists.bioenergylists.org" <
> digestion at lists.bioenergylists.org>
> Cc:
> Date: Mon, 29 Oct 2012 08:57:56 +0000
> Subject: [Digestion] Large scale Biodigestion plants
>
> I have been engaged in the development of a few bio digestion plants in
> the Southern Africa Region over the past 2 years. Up until now we have
> investigated CSTR and Lagoon technologies which have both proven to be
> water as well as effluent intensive relative to local climatic conditions
> and environmental legislation. These large scale applications typically
> have multiple feed streams such as Cattle & Chicken Manure, Vegetable and
> Fruit waste, Chicken DAF and other Abattoir waste streams ( e.g. Fatrap).
> Considering the water and effluent constraints mentioned, I am aware of
> other technologies that may be better suited to our specific needs (e.g.
> Dry Type / Batch Digestion). I would be interested in receiving information
> on Digestion technologies that can provide significantly lower water
> consumption thereby also reducing effluent volumes and Capital cost to
> clean water for safe return to the environment.
>
>
>
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