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:Synthetic wastewater
Denitrification system:Chemoautotrophic hydrogenotrophic denitrification
Denitrifying reactor:Membrane diffusion packed-bed bioreactor (MDPBR)
Medium:Polyethylene biofilm
Culture taken from:Activated sludge
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Hydrogen
Electron acceptor:Nitrate
Input NO3-N (mg/l):261
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):225-230
Microorganisms identified:nan
Molecular tools:nan
Major findings:Results from hydrogenotrophic denitrification using MDPBR, was that the negative effects of organics and heterotrophic bacteria in secondary effluent were not observed. This is a promising technology for tertiary nitrogen removal from municipal wastewater
Authors:Li et al., 2013
Title:Hydrogenotrophic Denitrification for Tertiary Nitrogen Removal From Municipal Wastewater Using Membrane Diffusion Packed-Bed Bioreactor
Pubmed link:Link
Full research link:Link
Abstract:A lab-scale membrane diffusion packed-bed bioreactor was used to investigate hydrogenotrophic denitrification for tertiary nitrogen removal from municipal wastewater. After start-up, the bioreactor had been operated for 165 days by stepwise increasing influent loading rates at 30 and 15°C. The results indicated that this bioreactor could achieve relatively high nitrogen removal efficiencies. The denitrification rates reached 0.250 and 0.230 kg N/(m(3)d) at 30 and 15°C respectively. The total nitrogen concentration in effluent was entirely below 2.0 mg/L at the steady operation state. The average increase of total organic carbon in effluent was approximately 0.41 mg/L, suggesting the risk of organic residue can be completely controlled. Dissolved oxygen (DO) did not show obviously negative effects on hydrogenotrophic denitrification. There was only slight decrease of DO concentration in effluent, which demonstrated almost all of the hydrogen was used for nitrate reduction.