Izvorni znanstveni članak
https://doi.org/10.17113/ftb.53.02.15.3629
Effect of Low-Density Static Magnetic Field on the Oxidation of Ammonium by Nitrosomonas europaea and by Activated Sludge in Municipal Wastewater
Jasmina Filipič
; Ptuj Municipal Service Corporation, Ptuj, Slovenia
Barbara Kraigher
; University of Ljubljana, Biotechnical Faculty, Department of Food Science and Technology, Ljubljana, Slovenia
Brigita Tepuš
; Ptuj Municipal Service Corporation, Ptuj, Slovenia
Vanja Kokol
; University of Maribor, Faculty of Mechanical Engineering, Institute for Engineering Materials and Design, Maribor, Slovenia
Sažetak
Ammonium removal is a key step in biological wastewater treatment and novel approaches that improve this process are in great demand. The aim of this study is to test the hypothesis that ammonium removal from wastewater can be stimulated by static magnetic fields. This was achieved by analysis of the eff ects of static magnetic field (SMF) on the growth and activity of Nitrosomonas europaea, a key ammonia-oxidising bacterium, where increased growth and increased ammonia oxidation rate were detected when bacteria were exposed to SMF at 17 mT. Additionally, the eff ect of SMF on mixed cultures of ammonia oxidisers in activated sludge, incubated in sequencing batch bioreactors simulating wastewater treatment process, was assessed. SMFs of 30 and 50 mT, but not of 10 mT, increased ammonium oxidation rate in municipal wastewater by up to 77 % and stimulated ammonia oxidiser growth. The results demonstrate the potential for use of static magnetic fields in increasing ammonium removal rates in biological wastewater treatment plants.
Ključne riječi
biological wastewater treatment; static magnetic field; sequencing batch reactors; ammonia-oxidising bacteria; nitrification
Hrčak ID:
140232
URI
Datum izdavanja:
23.6.2015.
Posjeta: 1.736 *