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 organic wastewater
Denitrification system:Simultaneous Desulfurization and Denitrification (SDD)
Denitrifying reactor:Anaerobic attached growth
Medium:Sponge cubes
Culture taken from:Waste water plant sludge
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Sulphide
Electron acceptor:Nitrate
Input NO3-N (mg/l):2.3
Nitrate removal rate (mg NO3-N/l/h):2.3
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:Simultaneous autotrophic and heterotrophic desulfurization–denitrification process resulted in the elimination of also sulfide and organic carbon with the presence of nitrate and nitrite.
Authors:Li et al., 2009
Title:Sulfide Removal by Simultaneous Autotrophic and Heterotrophic Desulfurization-Denitrification Process
Pubmed link:Link
Full research link:Link
Abstract:An anaerobic attached-growth bioreactor (AAGBR) of 3.52 L was operated for 510 days to treat sulfide-laden organic wastewater where nitrate and nitrite were introduced as electron acceptors. When the influent sulfide was kept at 200mg S(2-)-S/L and organic carbon was increased from 20 to 33.6 mg C/L, and the hydraulic retention time decreased from 41.4 to 2.67 h, the removal rates of sulfide and organic carbon reached 99.9% and 91.8% at the loading rates of 1800 mg S(2-)-S/(Ld) and 302.4 mg C/(Ld), respectively. Simultaneously, the introduced electron acceptors of nitrate and nitrite were, respectively, removed by 99.9% and 99.9% at the loading rates of 472.5 mg NO(3)(-)-N/(Ld) and 180 mg NO(2)(-)-N/(Ld). Inside the AAGBR, both autotrophic and heterotrophic denitrification processes were noted to take place. When the influent organic carbon was increased from 20 to 33.6 mg C/L, the nitrate and nitrite consumed for heterotrophic denitrification accounted for 27.3% and 48.5%, respectively. This simultaneous autotrophic and heterotrophic desulfurization-denitrification process has provided a demonstration of the possibility to eliminate sulfide and organic carbon with the presence of nitrate and nitrite