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:Seawater
Denitrification system:Recirculating aquaculture systems Heterotrophic Denitrification
Denitrifying reactor:Packed bed
Medium:Fiber type plastic
Culture taken from:Alcaligenes sp.
Organism (s) cultured:Japanese Flounder (Paralichthys olivaceus)
Respiration:Aerobic
Electron donor:Glucose
Electron acceptor:Nitrate
Input NO3-N (mg/l):52-310
Nitrate removal rate (mg NO3-N/l/h):nan
Denitrification rate (gNO3-N removed/m3/day):41
Microorganisms identified:nan
Molecular tools:nan
Major findings:The closed seawater recirculation system coupled with a denitrification tank is a cost-effective technique that helped maintain a good water quality that enabled the culturing of Japanese Flounder.
Authors:Honda et al., 1993
Title:High Density Rearing of Japanese Flounder, Paralichthys olivaceus with a Closed Seawater Recirculation System Equipped with a Denitrification Unit.
Pubmed link:None
Full research link:Link
Abstract:Rearing experiment of Japanese flounder was carried out under high density condition using a 2.25 m3 of closed seawater recirculation system equipped with a denitrification unit. After 10 months of rearing, fish grew to 501 g of mean body weight (initial: 9g). The total fish weight in the system became 97.6 kg, and the density per unit water volume in the system reached 43.4 kg/m3. Total amount of seawater used was 2.91 m3, then the product per unit volume of seawater used was 33.5 kg/m3. The aerobic filter of the system operated satisfactorily and both ammonia and nitrite concentrations of rearing water were maintained at less than 1 mg-N/l almost through the experimental period. The denitrification unit worked efficiently and nitrate concentration decreased from 314.6 mg-N/l to 51.9 mg-N/l duaring the experimental period. These results demonstrate that intensive culture of Japanese flounder under high density condition without wasteful use of seawater for rearing is possible by using the closed seawater recirculation system equipped with the denitrification unit.