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:Drinking water
Denitrification system:Autotrophic denitrification
Denitrifying reactor:Sulfur-based autotrophic denitrifying Membrane reactor
Medium:Polyethersulfone (PES)
Culture taken from:Denitrifying bacteria obtained from a sulfur-packed column bioreactor
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Elemental sulfur
Electron acceptor:Nitrate
Input NO3-N (mg/l):0.24
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:Results from the pilot scale study showed that sulfur based denitrifying MBR process was effective in nitrate removal from drinking water. The results of the study can be successfully used in the design of an efficient autotrophic denitrification MBR for drinking water treatment at fullscale.
Authors:Sahinkaya et al., 2015
Title:Sulfur-based autotrophic denitrification of drinking water using a membrane bioreactor
Pubmed link:None
Full research link:Link
Abstract:Sulfur-oxidizing autotrophic denitrification process has drawn significant attention due to its high efficiency, elimination of carbon requirement and the effluent contamination by organic compounds. In the process, nitrate and sulfur are used as electron acceptor, and electron donor, respectively. In the present study, a novel sulfur based autotrophic denitrification process utilizing membrane bioreactor (MBR) was tested for nitrate removal from drinking water. A bench-scale MBR equipped with hydrophilic flat sheet polyethersulfone (PES) membranes (0.45 ?m) was used. Sulfur was externally added to the MBR considering the theoretical requirement. Almost complete denitrification efficiency was achieved when the influent nitrate concentrations were 25–50 mg NO3?-N/L at HRT as low as 5 h corresponding to nitrate loading rates up to 0.24 g NO3?-N/(L d). The generated sulfate concentrations were close to the theoretical values. Membrane fouling was not significant at fluxes ?20 L/(m2 h).