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:Denitrification sludge
Culture taken from:Domestic wastewater treatment plant
Microorganism cultured:Planctomycetes
Respiration:Anaerobic
Electron donor:Ammonium sulfate ((NH4)2SO4)
Electron acceptor:Sodium sulfate (Na2SO4), Bicarbonate
PH:8.1
Maximum sludge concentration:3.5
HRT:1 d
NH4–N Influent conc(mg/L):80–180
NO2–N Influent conc(mg/L):nan
SO4–S Influent conc(mg/L):300–969
NH4–N Removal efficiency (%):94.8
NO2–N Removal efficiency (%):nan
SO4-S Removal efficiency (%):52.6
NLR kg-N/m3/d:77.52–181.62^
NRR kg-N/m3/d:nan
Major findings:The study results: Elemental sulphur formation and nitrogen removal were realized by SRAO process. When bicarbonate was added as an extra electron acceptor, the bacteria were able to oxidize ammonium with bicarbonate
Authors:Zhang et al., 2020
Title:Treatment performance and microbial community under ammonium sulphate wastewater in a sulphate reducing ammonium oxidation process
Pubmed link:Link
Full research link:Link
Abstract:A laboratory testing of simultaneous removal of ammonium and sulphate was studied from the sulphate reducing ammonium oxidation (SRAO) process in a circulating flow completely anaerobic bioreactor. Three different stages of starting SRAO process were studied, and final batch tests analysis of SRAO process was conducted. During the SRAO process, the influent concentrations of NH4+-N and SO42- were controlled to be 80-180 and 300-969 mg L-1 respectively. The highest removal efficiencies of NH4+-N and SO42--S were up to 94.80% and 52.57%. N/S [n(NH4+-N)/n(SO42--S)] conversion rates during the experiment had not been unified, which may be caused by the experiment's complex process. In order to further validate the biochemical interaction between ammonium and sulphate, batch tests were carried out. The extra electron acceptor, such as bicarbonate, was thought to react with ammonium by bacteria. The increase of NO3- production and HCO3- removal in the effluent indicated the occurrence of the new interaction between N-C. NH4+ was converted to NO2- and NO3-. Planctomycetes, Proteobacteria, Chloroflexi and Acidobacteria were detected in the anaerobic cycle growth reactor. The conversion of SRAO was mainly caused by the high performance of Planctomycetes. These results showed that nitrogen was converted by the partial nitrifying process, the denitrification process, and the traditional anammox process simultaneously with the SRAO process.