This study investigates the effects of temperature on ammonia oxidizing bacteria activity in a partial nitritation (PN) sequencing batch reactor. Stable PN was achieved in a 250 L SBR with a minimum operating volume of 111 L treating mature landfill leachate containing an ammonium concentration of around 6000 mg N-NH4+ L−1 at both 25 and 35 °C. A suitable influent to feed an anammox reactor was achieved in both cases. A kinetic model was applied to study the influence of free ammonia (FA), the free nitrous acid (FNA) inhibition, and the inorganic carbon (IC) limitation. NH4+ and NO2− concentrations were similar at 25 and 35 °C experiments (about 2500 mg N-NH4+ L−1 and 3500 mg N-NO2− L−1), FA and FNA concentrations differed due to the strong temperature dependence. FNA was the main source of inhibition at 25 °C, while at 35 °C combined FA and FNA inhibition occurred. DGGE results demonstrated that PN-SBR sludge was enriched on the same AOB phylotypes in both experiments.
CITATION STYLE
Gabarró, J., Ganigué, R., Gich, F., Ruscalleda, M., Balaguer, M. D., & Colprim, J. (2012). Effect of temperature on AOB activity of a partial nitritation SBR treating landfill leachate with extremely high nitrogen concentration. Bioresource Technology, 126, 283–289. https://doi.org/10.1016/j.biortech.2012.09.011
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