[Effect of Temperature on the Activity Kinetics of ].

A sequencing batch reactor (SBR) was operated in this study to investigate the effect of temperature on the kinetics of activity among nitrite oxidizing bacteria. At the beginning of the experiment, the NO-N concentration in the influent was changed to enrich . Then, the sludge with enriched was employed to determine the variation of the specific nitrite oxidation rate (SNiOR) during the nitrite oxidation process in batch tests. Metagenomics species annotation and abundance analysis showed that accounted for 40.3% of the total bacterial population. The variation of SNiOR in the nitrite oxidation process was investigated under different NO-N concentrations. The effect of temperature on the kinetics of was investigated using the Monod model. Furthermore, the kinetics model of the effect of temperature on activity was fitted for statistical analysis. The results showed that SNiOR reached its maximum at 30℃, which was 1.31 g·(g·d). Statistical analysis showed that the Monod equation could describe the effect of substrate concentration on activity under different temperature conditions. Calculating the temperature coefficient () in different temperature intervals based on the Phelps equation, showed that when the system temperature is lower than 25℃ or higher than 30℃, the reaction rate is more sensitive to temperature changes.