Water Science & Technology: Water Supply Vol 1 No 1 pp 71–80 © IWA Publishing 2001
One-stage deammonification: nitrogen elimination at low costs
CF Seyfried*, A Hippen**, C Helmer***, S Kunst**** and K-H Rosenwinkel*****
*
Institute of Sanitary Engineering and Waste Management,
University of Hannover, Welfengarten 1, D-30167 Hannover
**
Institute of Sanitary Engineering and Waste Management,
University of Hannover, Welfengarten 1, D-30167 Hannover
***
Institute of Sanitary Engineering and Waste Management,
University of Hannover, Welfengarten 1, D-30167 Hannover
****
Institute of Sanitary Engineering and Waste Management,
University of Hannover, Welfengarten 1, D-30167 Hannover
*****
Institute of Sanitary Engineering and Waste Management,
University of Hannover, Welfengarten 1, D-30167 Hannover
ABSTRACT
Biological nitrogen elimination used to purify wastewater with high
nitrogen contents can become a major cost factor, in particular when the
wastewater in question contains only little amounts of biologically
degradable carbon compounds. The use of new biological conversion methods
and the application of compact operation technology, however, does allow
us to save operation and investment costs. Currently, the focus of
scientific interest is on deammonification, that is the direct
conversion of ammonia into elementary nitrogen by autotrophic
micro-organisms, because in contrast to conventional
nitrification/denitrification this method requires considerably
smaller amounts not only of carbon, but also of oxygen. Moreover, the
use of compact biofilm technology makes it possible to considerably
reduce the reaction tank volume. In the following we will present
the operation results of both industrial plants and laboratory-scale
units for the treatment of wastewater with high nitrogen loads,
results which unequivocally show the favourable cost-effectiveness of the mentioned method combination and thus the economic viability inherent
in the purposeful industrial utilisation of this technology.
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