Biological Nitrogen Removal Database
A manually curated data resource for microbial nitrogen removal
Biological Nitrogen Removal Database
A manually curated data resource for microbial nitrogen removal
Influent:Synthetic wastewater
Anammox system:nan
Anammox reactor:Sequencing batch reactor (SBR)
Medium:Granular sludge
Culture taken from:Biofilm
Microorganism cultured:Kuenenia stuttgartiensis
Respiration:Anaerobic
Electron donor:Ammonium sulfate ((NH4)2SO4)
Electron acceptor:Sodium Nitrite (NaNO2)
PH:7–8
Maximum sludge concentration:7.6
HRT:1 d
NH4–N Influent conc(mg/L):150
NO2–N Influent conc(mg/L):150
SO4–S Influent conc(mg/L):nan
NH4–N Removal efficiency (%):nan
NO2–N Removal efficiency (%):nan
SO4-S Removal efficiency (%):nan
NLR kg-N/m3/d:0.3^
NRR kg-N/m3/d:0.05^
Major findings:Studies in to the effects of temperature on the ANAMMOX process were carried out. The maximum activity of non-adapted Anammox biomass was observed between 35 and 40?C, while a temperature of 45?C caused an irreversible decrease of the Anammox activity due to biomass lysis. Adaptation of the biomass to low temperatures was observed. However, neither changes on the physical properties of sludge nor qualitative changes on the bacterial populations were found during the operation of the reactor.
Authors:Dosta et al., 2008
Title:Short- and long-term effects of temperature on the Anammox process
Pubmed link:Link
Full research link:Link
Abstract:The application of the Anammox process has been usually focused on the treatment of wastewater with temperatures around 30 degrees C in order to operate under optimum conditions. In this work, the feasibility of the application of the Anammox process at lower temperatures has been tested. First, the short-term effects of temperature on the Anammox biomass were studied using batch tests. An activation energy of 63 kJ mol(-1) was calculated and the maximum activity was found at 35-40 degrees C. Activity tests done at 45 degrees C showed an irreversible loss of the activity due to the biomass lysis. A SBR was operated at different temperatures (from 30 to 15 degrees C) to determine the long-term effects. The system was successfully operated at 18 degrees C but when temperature was decreased to 15 degrees C, nitrite started to accumulate and the system lost its stability. Adaptation of biomass to low temperatures was observed when the specific activities obtained during first batch tests are compared to those obtained during the operation of the SBR.