title: Nitrogen compounds transformation in the biological filter by means of direct energy supply to the biofilm.
abstract: The aim of the research was to determine the effect that direct energy supply to the biofilm, which was attached to the packing with its temperature raised, exerts on the course of nitric compounds changes. The experiment was conducted in a laboratory scale. A model reactor which allowed smooth regulations of the packing temperature was used in the experiment. The energy supply was based on the emission of thermal radiation through the reactor's packing to the biofilm. On the basis of the conducted tests it has been found that such a technological solution improves the efficiency of wastewater treatment, nitrification processes in particular. The temperature range between 20 degrees C and 25 degrees C appeared to be optimal for nitrification. At temperatures higher than 25 degrees C anoxic spheres were generated in the deeper layers of the biofilm, which is proved by denitrification.
authors.affiliation: University of Warmia and Mazury in Olsztyn, Department of Environmental Protection Engineering Prawochenskiego St. 1, 10-957 Olsztyn, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Zielinski
authors.forename: M
authors.initials: M
authors.lastname: Debowski
authors.forename: M
authors.initials: M
authors.lastname: Krzemieniewski
mesh_terms: D018407:Bacterial Physiological Phenomena; D018441:Biofilms; D019149:Bioreactors; D005374:Filtration; D017672:Nitrogen Compounds / Q000378:metabolism*; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry; D013696:Temperature
chemical_list: D017672:Nitrogen Compounds; D012722:Sewage