Biological Nitrogen Removal Database

A manually curated data resource for microbial nitrogen removal


Water Treatment Plant


Experimental setup


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


Experimental Information


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


Information about Article


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