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:Circulating Flow Anaerobic Bioreactor (CFAB)
Medium:Granular sludge
Culture taken from:Anaerobic granule Sludge & Denitrification sludge
Microorganism cultured:nan
Respiration:Anaerobic
Electron donor:Ammonium sulfate ((NH4)2SO4), Ammonium chloride
Electron acceptor:nan
PH:7.8–8.5
Maximum sludge concentration:3
HRT:8.1
NH4–N Influent conc(mg/L):8.4
NO2–N Influent conc(mg/L):nan
SO4–S Influent conc(mg/L):67.3
NH4–N Removal efficiency (%):92
NO2–N Removal efficiency (%):nan
SO4-S Removal efficiency (%):52
NLR kg-N/m3/d:nan
NRR kg-N/m3/d:nan
Major findings:Simultaneous reduction of ammonium and sulfate was achieved in a self-designed reactor.
Authors:Zhang et al., 2019
Title:Study of sulfate-reducing ammonium oxidation process and its microbial community composition
Pubmed link:Link
Full research link:Link
Abstract:In this study, the simultaneous removal of ammonium and sulfate was detected in a self-designed circulating flow reactor, in which ammonium oxidization was combined with sulfate reduction. The highest removal efficiencies of NH4 +-N and SO4 2-S were 92% and 59.2%. NO2 - and NO3 - appeared in the effluent, and experimental studies showed that increasing the proportion of N/S in the influent would increase the NO2 - concentration in the effluent. However, N/S [n(NH4 +-N)/n(SO4 2-S)] conversion rates during the experiment were between 2.1 and 12.9, which may have been caused by the experiment's complex process. The microbial community in the sludge reactor included Proteobacteria, Chloroflexi, Bacteroidetes, Chlorobi, Acidobacteria and Planctomycetes after 187 days of operation. Proteobacteria bacteria had a more versatile metabolism. The sulfate-reducing ammonium oxidation (SRAO) was mainly due to the high performance of Proteobacteria. Nitrospirae has been identified as the dominant functional bacteria in several anammox reactors used for nitrogen removal. Approximately 12.4% of denitrifying bacteria were found in the sludge. These results show that a portion of the nitrogen was converted by nitrification-denitrification, and that traditional anammox proceeds simultaneously with SRAO.