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:Groundwater
Denitrification system:Sulfur limestone autotrophic denitrification (SLAD)
Denitrifying reactor:Combined bioelectrochemical and sulfur autotrophic denitrification system (CBSAD)
Medium:Sulphur granules
Culture taken from:Denitrifying reactor effluent
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Sulphur
Electron acceptor:Nitrate
Input NO3-N (mg/l):0.71
Nitrate removal rate (mg NO3-N/l/h):0.71
Denitrification rate (gNO3-N removed/m3/day):nan
Microorganisms identified:nan
Molecular tools:nan
Major findings:The CBSAD process is possible technology for groundwater denitrification.
Authors:Wan et al., 2009
Title:Using the combined bioelectrochemical and sulfur autotrophic denitrification system for groundwater denitrification
Pubmed link:None
Full research link:Link
Abstract:A combined bioelectrochemical and sulfur autotrophic denitrification system (CBSAD) was evaluated to treat a groundwater with nitrate contamination (20.9–22.0 mg NO 3 -N/L). The reactor was operated continuously for several months with groundwater to maximize treatment efficiency under different hydraulic retention times (HRT) and electric currents. The denitrification rate of sulfur autotrophic part followed a half-order kinetics model. Moreover, the removal efficiency of bioelectrochemical part depended on the electric current. The reactor could be operated efficiently at the HRT ranged from 4.2 to 2.1 h (corresponding nitrogen volume-loading rates varied from 0.12 to 0.24 kg N/m3 d; and optimum current ranged from 30 to 1000 mA), and the NO 3 -N removal rate ranged from 95% to 100% without NO 3 -N accumulation. The pH of effluent was satisfactorily adjusted by bioelectrochemical part, and the sulfate concentration of effluent was lower than 250 mg /L, meeting the drinking water standard of China EPA.