[Digestion] Nitrogen in effluent
Michael Köttner
m.koettner at biogas-zentrum.de
Mon Apr 30 07:05:35 CDT 2012
Dear Robin Jones,
also with a high nitrogen load of 5000mg/l and more a safe AD process
operation is possible.
What kind of technology is foreseen ?
Regards
Michael Köttner
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Am Montag, 30. April 2012, 13:04:17 schrieb Jones, Robin (TWP):
> We are in the feasibility stage for a 3MWe power generation plant using a
> bio digester (Continuous Flow) located adjacent to cattle feedlots.. The
> available feeds are tallow, cattle and chicken manure. The mass balance
> indicates a very high nitrogen content in the effluent (±5000mg/ltr). The
> effluent's rate of discharge is also significant posing a very real
> environmental concern. Has anyone had previous experience with similar
> effluents and if so what was the strategy to mitigate environmental risk
> without adding significant CAPEX, OPEX and parasitic loads.
>
> Considering the concentration of Nitrogen, we understand that this is not
> really a viable option for raw fertiliser (i.e. direct irrigation onto
> crops). It is understood that this would need to be concentrated up to
> reduce the volume prior to transporting to a fertiliser production
> facility approximately 80km away.
>
> Any comments related to this would be much appreciated.
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