Author/Authors :
Babaei، Ali Akbar نويسنده Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran , , Azadi، Roza نويسنده Department of Environmental Health Engineering, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran , , Jaafarzadeh، Nemat نويسنده Environmental Research Center, Ahwaz Jondishapour University of Medical Sciences, Ahwaz, Iran , , Alavi، Nadali نويسنده Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran ,
Abstract :
The lab-scale upflow anaerobic biofilm reactor was successfully operated for the treatment of synthetic wastewater
with high nitrogen load by Anammox (anaerobic ammonium oxidation) process. During the entire period of
operation, the reactor temperature was kept at 35±1C. The operational strategy consisted of both increasing the
ammonium and nitrite concentrations from 60 to 700mgN/L and from 80 to 920 mgN/L, respectively and
decreasing the hydraulic retention time from 24 to 6 h, at each step. The highest achieved removal efficiency of
ammonium and nitrite were 91 and 93%, respectively. Consequently, due to their acceptable performance for
nitrogen removal in previous researches, modified Stover-Kincannon and Grau second-order models were used in
this study. According to the experiment results, the model validity testing showed that the Stover-Kincannon model
was a little more appropriate for the description of nitrogen removal in the reactor, even though both models gave
high correlation coefficients (R2=0.999).
