Production of trout feed
(Produktion af °rredfoder)


Trout feed is produced industrially for aquaculture trouts.

Process description

The present data refer to trout feed production in three factories in Jutland, Denmark in 2000. The main processes are following 1) raw materials (fishmeal, fish oil, wheat, soybeans, gluten, minerals, vitamins and colour) are grinded and mixed, 2) the mixture is conditioned by heating with steam, 3) the conditioned mixture extruded to pellets, 4) the pellets are dryed with hot air, 5) the pellets are cooled, packed and stored before distribution to trout farmers.

Data collection and treatment

Data (except air-emissions) have been collected from three major trout feed producers. Data are based on producers green accounts and other records from 2000. Inputs and outputs have been determined as a non-weighted average over the year from the three facories.

Technical scope

All production processes as well as administration are included. Emissions to municipal waste water treatment has not been included. packaging has not been included.


The three considered feedfactories covers the danish markted almost 100%.


Data from the three factories are quite uniform.

Inputs and outputs

Inputs and outputs associated with trout feed production are shown in the table below. Data are provided per kg of trout feed without packaging.

    Unit Quantity










Materials and fuels    
Fish oil kg 0.20
Fishmeal kg 0.47
Wheat kg 0.14
Soy meal kg 0.18
Sodiumhydroxide. NaOH l 1.9E-06
Hydrochloric acid, HCl l 5.5E-06
Boric acid l 1.7E-06
Petroleumether l 1.9E-06
Sulphuric acid, H2SO4 l 3.8E-05
Electricity kWh 0.12
Heat MJ 0.71


Trout feed kg 1

Location in database: Material/Food from industry/From feed industry/Trout feed

Administrative information

Data URL:
Version no.: 1.00
Authors: Erik Ol
esen, H°jmarkslaboratoriet and Per H. Nielsen 2.-0 LCA Consultants.
Data entry: Data have been entered in this format by
Erik Olesen
and Per H. Nielsen

Data completed: 
July 2003.