『Abstract
Kinetic studies of nitrification and denitrification were carried
out on reconstituted cores of sediments taken from wastewater
stabilization ponds. This study aims to quantify the nitrification
and denitrification in the sediment and to offer kinetic models
to describe the processes. Sediment cores were collected, and
laboratory studies were performed. The result showed that nitrification
and denitrification processes are absent in the water column of
stabilization ponds of the Bertrix (Belgium) wastewater treatment
plant. On the contrary, nitrification and denitrification rates
measured on 18 cores of sediment are, respectively, in the range
of 0.12-1.56 g N-NH4+/m2
day and 0.1-1.2 g N/m2 day. In order to describe nitrification
and denitrification processes, two kinetic models were developed
using the Monod standard equation.
Keywords: Nitrification; Denitrification; Wastewater stabilization
pond; Sediment
1. Introduction
2. Materials and methods
2.1. Description of the Bertrix wastewater treatment plant
2.2. Sampling and implementation on the tests
2.3. Calculation methods
2.3.1. nitrogen mass balance in the liquid phase
2.3.2. Kinetic of nitrification
3. Results and discussion
3.1. Nitrogen mass balance
3.2. Kinetic of nitrification
3.3. Kinetic of denitrification
4. Conclusion
Acknowledgements
References