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:nan
Denitrification system:Sulfur-driven denitrification
Denitrifying reactor:Fluidized-bed
Medium:Granular elemental sulfur
Culture taken from:Tidal flats sediments
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Sulphur
Electron acceptor:Nitrate
Input NO3-N (mg/l):7.54
Nitrate removal rate (mg NO3-N/l/h):6.91
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:Sulphur fluidized bed reactors are suitable for post-denitrification when higher loading rates and shorter empty bed contact time are preferred.
Authors:Kim et al., 2004
Title:Performance of a sulphur-utilizing fluidized bed reactor for post-denitrification
Pubmed link:None
Full research link:Link
Abstract:The performances of sulphur fluidized bed reactors (SFBRs) were evaluated and compared with those of sulphur packed-bed reactors (SPBRs). SFBR-1 fed with 20 mg/l NO3?–N showed a denitrification efficiency greater than 91.7% up to a loading rate of 2.53 kg NO3?–N/m3 day, with a corresponding empty bed contact time (EBCT) of 0.19 h. For SFBR-2 fed with 700 mg/l of NO3?–N, denitrification efficiency was greater than 98% up to a loading rate of 2.68 kg NO3?–N/m3 day (EBCT of 6.1 h). Nitrogen removal rates of SFBRs were significantly higher than those of SPBRs. The nitrous oxide content in the produced gas was also much lower in SFBRs than in SPBRs. Good mass transfer of nitrate to the biofilm on sulphur surfaces and absence of clogging problems could be the main reasons for the higher nitrogen removal rate in the SFBRs. The present findings suggest that SFBRs are suitable for post-denitrification when higher loading rates and shorter EBCTs are preferred.