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:Sulfide-laden synthetic wastewater
Denitrification system:Simultaneous Desulfurization and Denitrification (SDD)
Denitrifying reactor:Expanded granular sludge bed
Medium:nan
Culture taken from:Biogranule sludge
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Acetate
Electron acceptor:Nitrate
Input NO3-N (mg/l):7.2
Nitrate removal rate (mg NO3-N/l/h):6.6
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:Simultaneous removal of sulfide, nitrate, and acetate was achieved using DSR process. Nitrate was reduced to nitrite via autotrophic denitrification and nitrite was reduced to nitrogen via heterotrophic denitrification.
Authors:Chen et al., 2009
Title:High-rate denitrifying sulfide removal process in expanded granular sludge bed reactor.
Pubmed link:Link
Full research link:Link
Abstract:An expanded granular sludge bed (EGSB) reactor was adopted to incubate bio-granules that could simultaneously convert 4.8 kg-S m?3 d?1 of sulfide in 97% efficiency; 2.6 kg-N m?3 d?1 of nitrate in 92% efficiency; and 2.7 kg-C m?3 d?1 acetate in 95% efficiency. Mass balance calculation of sulfur, nitrogen, and carbon over the EGSB reactor confirmed the performance results. This noted reactor performance is much higher than those reported in literature. Stoichiometric relation suggests that the nitrate was reduced to nitrite via autotrophic denitrification pathway, then the formed nitrite was converted via heterotrophic denitrification pathway to N2.