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The
main objectives are to develop new nitrogen
removal processes in wastewater treatment
based on deammonification for industrial
mainstream and municipal side stream processes.
The processes are cost effective and decrease
energy consumption to aeration to approx.
1/5 of conventional nitrification/denitrification
and thereby decrease the carbon oxide emission.
Carbon is not used as energy source in this
process.
The
deammonification process consists of a combination
of ammonia oxidation to nitrite (nitritation)
and anaerobic ammonium oxidation, “Anammox”,
which leads to directly degradation to N2.
This biological conversion is a reaction
of ammonium as electron donor and nitrite
as electron acceptor. This reaction will
generate energy for growth of microorganisms
being able to catalyse this reaction. To
improve the effectiveness of the process
a functional separation of nitritation and
N-elimination in a two-step operation activated
sludge concept shall be developed.
A
functional combination in fixed biofilm
has been confirmed, but no scientifically
investigations for the process applicability
in activated sludge has been done.
The
research will be based on pilot tests on
anaerobic pretreated industrial wastewater
and digester supernatant side stream on
municipal WWTP.
The
results, which will be process models will
be used for full scale outline projects
for the WWTP at CP Kelco and Herning WWTP.
Anammox
(Anaerobic Ammonium Oxidation)
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