Biological Nitrogen Removal Database

A manually curated data resource for microbial nitrogen removal

Freshwater systems

Experimental setup

Influent:Aquaculture wastewater

Denitrification system:Recirculating aquaculture systems Heterotrophic Denitrification

Denitrifying reactor:Flow-through

Medium:Rotating disc

Culture taken from:Activated sludge

Organism (s) cultured:Rainbow trout (Salmo gairdneri Richardson)


Electron donor:Hydrolyzed corn starch

Electron acceptor:Nitrate

Experimental Information

Input NO3-N (mg/l):nan

Nitrate removal rate (mg NO3-N/l/h):30.0

Denitrification rate (gNO3-N removed/m3/day):nan

Microorganisms identified:nan

Molecular tools:nan

Information about Article

Major findings:Water quality maintained by addition of hydrolysed corn starch. The trout in the recirculating system grew as well as under field conditions.

Authors:Kaiser and Schmitz (1988)

Title:Water quality in a dosed recirculating fish culture system influenced by addition of a carbon source in relation to feed uptake by flsh

Pubmed link:None

Full research link:Link

Abstract:In a closed recirculating fish culture system with a rotating disc filter serving as ‘biofilter”, waterquality was maintained by the addition of hydrolysed corn starch in the settable solids tank. According to the feed uptake by rainbow trout. Salmo gairdneri Richardson, starch was introduced to adjust a nutrient relation of organic C:N of 1·6:1 for the bacterial biomass. Trout grew from 42 g to 254 g in body weight in 118 days. No differences in feed uptake and feed conversion rate were observed in a control group held in a flow?through system with tap water as culture medium.