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:Heterotrophic denitrification
Denitrifying reactor:Gas–liquid–solid fluidized bed bioreactor
Medium:Activated charcoal
Culture taken from:Activated sludge
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Methanol
Electron acceptor:Nitrate
Input NO3-N (mg/l):104.6
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:A three phase fluidized bed reactor was used for nitrate removal from wastewater. The optimum conditions for efficient and high removal rate of nitrate were 20–35 ?C, pH value of 6.5–7.5, HRT of 3 h, C/N of 0.95–1 and gas influx of 0.3 m3/h.
Authors:Wen et al., 2003
Title:The denitrification treatment of low C/N ratio nitrate-nitrogen wastewater in a gas–liquid–solid fluidized bed bioreactor
Pubmed link:None
Full research link:Link
Abstract:A 12 l gas–liquid–solid three-phase fluidized bed bioreactor in which biomass supported on activated charcoal was used to remove nitrate-nitrogen from wastewater and its performance was considered. The effects of temperature, pH, C/N ratio, gas flow rate and hydraulic residence time (HRT) on nitrate-nitrogen reduction were investigated and discussed. The optimum operated conditions such as temperature of 20–35 °C, pH value of 6.5–7.5, HRT of 3 h, C/N of 0.95–1 and gas influx of 0.3 m3/h were found. Under optimum operated conditions, the average removal ratios of COD and NOx-N are higher than 92% and 96%, respectively. In addition, the radial and axial positions have little influence on the local profiles of COD and NOx-N.