Nitrification and denitrification processes for biologic treatment of industrial effluents.
Nitrification process performance was evaluated using a three-phase fluidized-bed bioreactor. A synthetic effluent was used for this experiment containing 180-230 mg/L of chemical oxygen demand (COD), 25-30 mg/L of N-NH4+, 12 to 13 mg/L of total phosphorous, and micronutrients. The bioreactor used for denitrification behaved as completely mixed. The results indicate that the nitrification process was efficient, reaching efficiencies of about 98%. The best results related to the efficiency of the denitrification process were obtained when the processes were supplemented with the carbon source. The results indicated an efficiency of 86-98% COD removal.
Tavares
C R
CR
State University of Maringá, Parana, Brazil. celia@deq.uem.br
Rocha
R R
RR
Guedes
T A
TA
D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D019149:Bioreactors; D007220:Industrial Waste; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism*; D014865:Waste Disposal, Fluid
D007220:Industrial Waste; D009584:Nitrogen