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:Anaerobic sludge digester of a municipal wastewater treatment plant
Anammox system:nan
Anammox reactor:Pilot-scale reactor
Medium:Methanogenic granules
Culture taken from:Full-scale EGSB reactor that treated brewery wastewater
Microorganism cultured:nan
Respiration:Anaerobic
Electron donor:Ammonium sulfate ((NH4)2SO4)
Electron acceptor:Sodium Nitrite (NaNO2)
PH:7.5
Maximum sludge concentration:20–31
HRT:nan
NH4–N Influent conc(mg/L):709–1027
NO2–N Influent conc(mg/L):927.8–1,409.0
SO4–S Influent conc(mg/L):nan
NH4–N Removal efficiency (%):92.3
NO2–N Removal efficiency (%):nan
SO4-S Removal efficiency (%):nan
NLR kg-N/m3/d:nan
NRR kg-N/m3/d:6.4
Major findings:Granulation of Anammox microorganisms was studied with a lab-scale reactor using synthetic medium and a pilot-scale reactor using reject water from an anaerobic sludge digestion process
Authors:Imago et al., 2004
Title:Granulation of Anammox microorganisms in up-flow reactors
Pubmed link:Link
Full research link:Link
Abstract:Experimental studies were performed to evaluate the feasibility of granulation of Anammox microorganisms for biomass retention in up-flow reactors. Two experimental studies, one using a 6.4-L lab-scale reactor with synthetic medium and the other using a 200-L pilot-scale reactor with half-nitrified reject water from a sludge digester were conducted. To enhance the granulation process, seed granules from a UASB reactor were added to both experimental reactors. Granulation of Anammox microorganisms was observed using both the synthetic medium and the reject water. The core of a large proportion of Anammox granules retained part of the original seed biomass. The Anammox granules had a slightly lower density than the seed granules from the UASB process, but the size and other physical properties were comparable. The successful granulation of the Anammox microorganisms led to a stable nitrogen removal performance. The maximum nitrogen removal rate of the lab-scale reactor was observed to be 2.9 kg/(m3 x d) after 173 days of operation and that of the pilot-scale reactor was 6.4 kg/(m3 x d) after 12 months of operation.