Comparison of reject water treatment with nitrification/denitrification via nitrite in SBR and SHARON chemostat process.
A comparison between three feasible ways of developing Biological Nitrogen Removal (BNR) via nitrite to treat real reject water of 800-900 mg NH4(+)-N l(-1) is proposed. A Sequencing Batch Reactor (SBR) and a chemostat SHARON (Single reactor High activity Ammonium Removal Over Nitrite) continuous reactor were operated. In the SBR operation 0.8 kg N (d m3)(-1) was achieved, whereas in SHARON/denitrification the removal reached was 0.4 kg N (d m3)(-1). SHARON was also developed with partial nitrification of ammonium in order to obtain a stream ready for Anammox (Anaerobic Ammonia Oxidation) process obtaining an effluent with an average composition of 400 mg NO2(-)-N l(-1) and 350 mg NH4(-)-N l(-1).
Galí
A
A
Department of Chemical Engineering, University of Barcelona, Martí i Franquès, 1, 6th floor, 08028 Barcelona, Spain.
Dosta
J
J
Macé
S
S
Mata-Alvarez
J
J
D019149:Bioreactors; D009566:Nitrates / Q000032:analysis / Q000378:metabolism; D009573:Nitrites / Q000032:analysis / Q000378:metabolism*; D000644:Quaternary Ammonium Compounds / Q000032:analysis / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*
D009566:Nitrates; D009573:Nitrites; D000644:Quaternary Ammonium Compounds