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:Meat-processing wastewater
Denitrification system:Heterotrophic denitrification
Denitrifying reactor:Sequencing Batch Reactor (SBR)
Medium:Suspended culture
Culture taken from:Activated sludge
Organism (s) cultured:nan
Respiration:Anaerobic–aerobic
Electron donor:Rendering stickwater
Electron acceptor:Nitrate
Input NO3-N (mg/l):nan
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):10.5
Microorganisms identified:nan
Molecular tools:nan
Major findings:4 carbon sources were examined for the efficiency for nitrate removal. Paunchor liquor and rendering stickwater resulted in higher denitrification rates being obtained when used as carbon sources compared to when dilute blood and slaughterfloor wastewater.
Authors:Bickers et al., 2000
Title:Availability for denitrification of organic carbon in meat-processing wastestreams
Pubmed link:None
Full research link:Link
Abstract:Meat-processing wastewater typically contains high concentrations of nitrogen, which must be removed before discharge of the water to water bodies. Nitrogen can be removed by biological denitrification, and for this, readily metabolisable organic carbon must be present. This study investigated the ability of three meat-processing wastestreams (rendering stickwater, paunch liquor, slaughterfloor effluent) and dilute (1%) blood to supply organic carbon for denitrification. Anoxic batch tests were used, and the maximum specific denitrification rates and anoxic half-saturation constants were estimated for each wastestream. Rendering stickwater and paunch liquor contained large amounts of readily biodegradable COD, with a maximum of 315-mg l?1 in paunch liquor and 2145 mg l?1 in stickwater, and so sustained high initial denitrification rates. Slaughterfloor wastewater and dilute blood contained little or no significant amounts of readily biodegradable COD, resulting in slower denitrification rates. The ultrafiltered COD fraction (<5000 and <10000