Denitrification of groundwater in the biofilm reactor with a specific biomass support material

english

2006

volume 53, issue 3

Slovensko kemijsko društvo
(Obvezni izvod spletne publikacije)

This study demonstrated the feasibility of a fixed-bed reactor system with a specific biomass support material for groundwater treatment. The denitrification rate increased up to a maximal value of 1.3 gNO3-N m-2 day-1 with increasing nitrogen loading rate. Kinetic analysis of the system confirmed a half-order denitrification kinetic region in the NOx-N concentration range from 0.25 mg L-1 to 16 mg L-1, with the half-order reaction coefficient k1ž2 of 0.35 g0.5 m-0.5 day-1 when the carbon source was in excess. Under the experimental conditions, drinking water quality was achieved at a nitrogen loading lower than 1.9 gNO3-N m-2 day-1 with an influent COD/N ratio of 3.7 if acetate was used as the carbon source. The system is fairly robustč it can be operated in a simple manner at low hydraulic loadings without recirculation flow and without backwashing.

16.09.2009