Nitrogen removal in an anaerobic baffled filter reactor with aerobic post-treatment.
A new sewage treatment system was studied, which consisted of an anaerobic baffled filter reactor and the following aerobic post-treatment. One of the two studied systems (AN-I) was inoculated with psychrophilic digested sludge, the second one (AN-II) was operated without inoculation. The HRT in anaerobic and aerobic parts of the reactors were about 15 and 4 h, respectively. The temperature in both reactors varied during the year from 4.5 to 23 degrees C. All monitored parameters were removed with relatively high efficiencies (COD = 78.6-83.0%, BOD5 = 92.5-94.0% and SS = 80.9-92.7%). An intensive nitrification process was observed during the whole year in both reactors (under average temperature of 5.9 degrees C in January 2000, also). The average removal of the NH4-N varied during the year from 46.4% to 87.3%. In both systems a partial denitrification process was observed, too.
Bodík
Igor
I
Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic. bodik@chtf.stuba.sk
Kratochvíl
Karol
K
Gaspariková
Eva
E
Hutnan
Miroslav
M
D000332:Aerobiosis; D000693:Anaerobiosis; D019149:Bioreactors; D009584:Nitrogen / Q000302:isolation & purification*; D010865:Pilot Projects; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*
D012722:Sewage; D009584:Nitrogen