Production of animal proteins

The first step in processing is separation by centrifugation into cells and plasma. In centrifugation, canisters containing the blood are spun at high speed. All solid components (cells and platelets) settle firmly at the bottom of the canister and the plasma is taken off from the top of the canister.

Plasma

Plasma is a translucent, straw-coloured fluid that constitutes about 60% of the volume of the blood. 
It is 92 - 93% water but the other 7 - 8 % contains important proteins, amino acids, vitamins, minerals and many bioactive peptides of great biological value.
The plasma fraction is subjected to filtration and evaporation. Water and optional salts (anticoagulants) are removed. 

Following concentration, the plasma is ready for spray drying. Spray-drying is the process whereby tiny droplets or particles of a product are sprayed at high pressure from fine nozzles into a pressure chamber at or above 200º C. The droplets dry instantly, without damaging their nutritional value and the high temperature eliminates any risk of microbial contamination. The powder produced is stable and has good keeping qualities. 

The dried plasma is bagged as a batch that is labelled and identifiable. The bags are sealed in sterile conditions. Quality checks are carried out for microbiological safety and the nutritional components in the end product. 

Haemoglobin

By centrifuging, the blood is separated in 60% plasma and 40% red cells. The dry matter content in haemoglobin is 3% and after spray drying the products contain 93 – 94% protein with very high digestibility. 
Haemoglobin is very valuable in feeds for fish, fur animals and piglets if coursed from non ruminant blood. 

Non-ruminant blood products (e.g. plasma protein, haemoglobin protein) are only permitted in diets for non-ruminant farm animals.


Blood meal

Blood meal is made by purifying extracts from the solid fraction of pig’s blood in a high-technology spray-drying or disk drying plant. Non-ruminant blood meal can only be used in feeds for fish. 

The labelling, packaging and transport measures are the same for products for piglet feeds and fish feeds. Each consignment of fish feed is further checked by microscopy before release.