title: Ammonia Nitrogen Transformations in a Reactor with Aggregate made of Sewage Sludge Combustion Fly Ash.
abstract: The influence of light weight aggregate made of fly ash from sewage sludge thermal treatment (FASSTT LWA) on ammonia nitrogen metabolism, and on quantitative and qualitative changes of microorganisms colonizing the filling, was investigated. Two reactors were used in the experiment. The first was filled with gravel, the other with FASSTT LWA. The reactors were operated with a wastewater hydraulic loading rate of 5 mm(3) mm(-2) d(-1). During the eleven-week experiment, high efficiency of ammonia removal was observed. The lower concentrations of nitrites and nitrates in the effluent indicate that ammonia nitrogen removal resulted not just from nitrification. Nitrate concentration increase was reflected in a decrease in nitrogen removal efficiency. One possible explanation for this phenomenon is that in the period when ammonia nitrogen and nitrites were present in the reactor's FASSTT LWA filling, facilitating conditions occurred for the deammonification process.
authors.affiliation: Department of Environment Engineering, University of Warmia and Mazury in Olsztyn, Warszawska St. 117a, 10-719 Olsztyn, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Rodziewicz
authors.forename: Artur
authors.initials: A
authors.lastname: Mielcarek
authors.forename: Wojciech
authors.initials: W
authors.lastname: Janczukowicz
authors.forename: Andrzej
authors.initials: A
authors.lastname: Białowiec
authors.forename: Anna
authors.initials: A
authors.lastname: Gotkowska-Płachta
authors.forename: Marcin
authors.initials: M
authors.lastname: Proniewicz
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D001419:Bacteria / Q000378:metabolism*; D019149:Bioreactors; D001711:Biotransformation; D060729:Coal Ash / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000378:metabolism*; D012722:Sewage
chemical_list: D060729:Coal Ash; D012722:Sewage; D000641:Ammonia; D009584:Nitrogen