Denitrification system:Recirculating aquaculture systems Heterotrophic Denitrification
Culture taken from:Activated sludge
Organism (s) cultured:Rainbow trout (Salmo gairdneri Richardson)
Electron donor:Hydrolyzed corn starch
Input NO3-N (mg/l):nan
Nitrate removal rate (mg NO3-N/l/h):30.0
Denitrification rate (gNO3-N removed/m3/day):nan
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
Full research link:LinkAbstract: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.