Effect of Trace NO2 and Kinetic Characteristics for Anaerobic Ammonium Oxidation, Methanogenesis, Denitrification and Their Integration of Granular Sludge

摘要

The effect of trace NO2 on anaerobic ammonium oxidation, methanogenesis and denitrification in separate system was investigated by batch experiment. Trace NO2apparently enhanced the anaerobic ammonium oxidation, the function for NO2 apparently to enhance ammonium oxidation was suggested using the Haldane based model. The parameters were estimated, where the half saturate coefficient of NO2 was2.570 mg/L, inhibition coefficient of NO2 was 0.0039 mg/L, the maximum enhanced rate coefficient was 48.79, the basic rate coefficient was 0.0188. The effect of NO2 on methanogenesis and denitrification kinetics could be described using uncompetitive inhibition model. The maximum COD removal rate, half saturation constant of organic substance and NO2inhibition coefficient in methanogenesis were 0.149 mg COD(mgVSS¡¤h) -1, 396mgCOD/L and 0.231 mg NO2 /L, respectively. The maximum nitrite removal rate, half saturation constant of NO-2-N and NO2 inhibition coefficient in denitrification were 0.006865h-1, 0.1 mg NO-2-N /L and1.530 mg NO2 /L, respectively. The effect of trace NO2 integrating methanogenesis, denitrification and anaerobic ammonium oxidation was investigated by batch experiment. Also, the function for NO2apparently to enhance ammonium oxidation was suggested by the Haldane based model. The parameters were estimated, where the half saturate coefficient of NO2 was 1.96 mg/L, inhibition coefficient of NO2 was 0.0082 mg/L, the maximum enhanced rate coefficient was 30.55, the basic rate coefficient was 0.0314. The effect of trace NO2 on methanogenesis and denitrification kinetics could be described by uncompetitive inhibition model. The maximum COD removal rate, half saturation constant of organic substance and NO2 inhibition coefficient in methanogenesis were 0.15mgCOD /(mgVSS¡¤h),395mgCOD /L and 0.623 mg NO2 /L respectively. The maximum nitrite removal rate, half saturation constant of NO-2-N and NO2 inhibition coefficient in denitrification wer- - e0.00685 h-1, 0.214 mg NO-2-N /L and 22.4mg NO2 /L respectively. The most of NOX in the experiment was lossed.