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:Sludge digester liquor treatment
Comammox System:Partial-nitrification, comammox, and anammox
reactor:Sequencing batch reactor (SBR)
Medium:Suspended-sludge
Culture taken from:Recycled sludge from a secondary clarifier from a sewage treatment plant and laboratory SBR that was used to enrich anammox bacteria
Microorganism cultured:Nitrospira
Respiration:Aerobic
Electron donor:Methanol
Electron acceptor:Ammonium, nitrite
PH:7.0-8.0
Temperature: 18?°C-28.9?°C
HRT:nan
NH4–N Influent conc(mg/L):2800–3000
NO2–N Influent conc(mg/L):nan
NO3–N Influent conc(mg/L):nan
NH4–N Effluent (mg N/L):2.27?
NO2–N Effluent (mg N/L):0.21
NO3-N Effluent (mg N/L): 1.51
NH4–N removal rate mg/L/d:0.2543
NO2–N removal rate mg/L/d:nan
NO3-N removal rate mg/L/d:nan
TN Removal rate (mg N/L/d):10?
Authors:Wu et al., 2019
Title:Cooperation between partial-nitrification, complete ammonia oxidation (comammox), and anaerobic ammonia oxidation (anammox) in sludge digestion liquid for nitrogen removal
Pubmed link:None
Full research link:Link
Abstract:The challenge of sludge digester liquor treatment is its high ammonium nitrogen (NH4+-N) concentration. Early reports found that complete ammonia oxidation (comammox) was not present and anaerobic ammonia oxidation (anammox) was difficult to achieve in most sludge digester liquor treatments. In this study, NH4+-N removal by cooperation between partial-nitrification, comammox, and anammox processes was achieved in a sequencing batch reactor (SBR) for sludge digester liquor treatment. The results showed that 2100-2200 mg/L of NH4+-N was removed in the SBR with 98.82% removal efficiency. In addition, 55.11% of NH4+-N was converted to nitrite nitrogen (NO2--N) by partial-nitrification, 25.43% of NH4+-N was converted to nitrate nitrogen (NO3--N) by comammox, and 18.28% of NH4+-N was removed by anammox. During the operation, in the SBR, the relative abundance of the dominant ammonia-oxidizing bacteria (Chitinophagaceae) was 18.89%, that of the dominant anammox bacteria (Candidatus Kuenenia) was 0.10%, and that of the dominant comammox bacteria (Nitrospira) was 0.20%. Therefore, the high nitrogen removal efficiency in this system was considered the result of the combination of the three processes. These results showed that comammox and anammox could play very important roles in nitrogen transformation and energy-saving in nitrogen removal systems.