title: Influence of temperature on the activity of anammox granular biomass.
abstract: The aim of this study was to determine a short-term and long-term effect of temperature on the anammox rate and determination of temperature coefficients in the Arrhenius and Ratkowsky equations. The short-term effects of temperature on the anammox granular biomass were investigated in batch tests at ten different temperatures in the range of 10-55 °C. The maximum overall nitrogen removal rate of 1.3 gN gVSS(-1)·d(-1) was observed at 40 °C (VSS: volatile suspended solids). The minimum rate, close to 0 gN gVSS(-1)·d(-1), was observed for the limits of the analyzed temperature range (10 and 55 °C). The activity tests carried out at 55 °C showed an irreversible loss of the activity due to the observed biomass lysis. Subsequently to the batch tests, a sequencing batch reactor (SBR) was operated at different temperatures (from 30 to 11 °C) to determine the long-term effects of temperature. The system was successfully operated at 15 °C, but when temperature was decreased to 11 °C, nitrite started to accumulate and the system lost its stability. The temperature coefficient (θ) was 1.07 for the batch tests carried out in the temperature range of 10-40 °C. In contrast, during the long-term SBR operation, substantially different θ had to be estimated for two temperature ranges, 1.07 (T = 15-30 °C) and 1.65 (T = 11-15 °C).
authors.affiliation: Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland E-mail: domsobot@pg.gda.pl.
authors.forename: D
authors.initials: D
authors.lastname: Sobotka
authors.affiliation: Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland E-mail: domsobot@pg.gda.pl.
authors.forename: K
authors.initials: K
authors.lastname: Czerwionka
authors.affiliation: Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland E-mail: domsobot@pg.gda.pl.
authors.forename: J
authors.initials: J
authors.lastname: Makinia
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D018533:Biomass; D019149:Bioreactors; D009573:Nitrites; D009584:Nitrogen; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D013696:Temperature; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; D009584:Nitrogen