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:Wastewater
Denitrification system:Autotrophic denitrification
Denitrifying reactor:Packed-bed reactor (PBR)
Medium:Sulfur granules
Culture taken from:Denitrifying activated sludge
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Sulfur
Electron acceptor:Nitrate
Input NO3-N (mg/l):6.25
Nitrate removal rate (mg NO3-N/l/h):1.3-10.0
Denitrification rate (gNO3-N removed/m3/day):0.3
Microorganisms identified:nan
Molecular tools:nan
Major findings:Optimization of sulfur based denitrification in pilot scale reactors indicate that alkalinity turns to limit the process at high loading rates.
Authors:Sahinkaya et al., 2014
Title:Pilot and full scale applications of sulfur-based autotrophic denitrification process for nitrate removal from activated sludge process effluent
Pubmed link:None
Full research link:Link
Abstract:Sulfur-based autotrophic denitrification of nitrified activated sludge process effluent was studied in pilot and full scale column bioreactors. Three identical pilot scale column bioreactors packed with varying sulfur/lime-stone ratios (1/1–3/1) were setup in a local wastewater treatment plant and the performances were compared under varying loading conditions for long-term operation. Complete denitrification was obtained in all pilot bioreactors even at nitrate loading of 10 mg NO3?–N/(L.h). When the temperature decreased to 10 °C during the winter time at loading of 18 mg NO3?–N/(L.h), denitrification efficiency decreased to 60–70% and the bioreactor with S/L ratio of 1/1 gave slightly better performance. A full scale sulfur-based autotrophic denitrification process with a S/L ratio of 1/1 was set up for the denitrification of an activated sludge process effluent with a flow rate of 40 m3/d. Almost complete denitrification was attained with a nitrate loading rate of 6.25 mg NO3?–N/(L.h).