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:Ocean tank
Denitrification system:Recirculating aquaculture systems Heterotrophic Denitrification
Denitrifying reactor:Packed bed
Medium:nan
Culture taken from:Bacteria (of the genus Pseudomonas)
Organism (s) cultured:nan
Respiration:Anaerobic
Electron donor:Methanol
Electron acceptor:Nitrate
Input NO3-N (mg/l):40-130
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):180-200
Microorganisms identified:nan
Molecular tools:nan
Major findings:The system developed can applied for modelling carbon and nitrogen flux studies in closed marine water systems in which heterotrophic organisms are hosted.
Authors:Grguric et al., 2000b
Title:Carbon and nitrogen fluxes in a closed seawater facility.
Pubmed link:Link
Full research link:Link
Abstract:A variety of empirical and calculated data from the largest tank at the New Jersey State Aquarium were used to quantify the fluxes of carbon and nitrogen before and after the installation of denitrification in this facility. Before denitrification, the stock of dissolved inorganic carbon (DIC) in Ocean Tank exhibited a decrease of 6.9 kg C/month and sodium bicarbonate had to be added to maintain DIC in steady state. We were able to explain the DIC decrease by two non-conservative processes: the formation of carbonaceous precipitates (removes 4.2 kg C/month) and outgassing of carbon dioxide due to acidity from nitrification (independently determined to remove 3.2 kg C/month). Nitrogen budget in Ocean Tank before denitrification is in contrast to that of carbon, and it shows an increase of 4.8 kg N/month in the form of nitrate. Denitrification is currently removing 53.3 kg N/month (in the form of nitrogen gas), so this element should eventually reach steady state. The use of methanol for denitrification has resulted in a flux of 26.3 kg C/month into the aquarium and, as predicted, an increase in Ocean Tank DIC stock has been observed without any additions of sodium bicarbonate. Our approach can be used to model carbon and nitrogen balances in closed seawater facilities that host heterotrophic organisms and operate either with or without a biological denitrification system.