Process lines of GEA Westfalia Separator Group support abattoirs in the economic obtaining of blood plasma and blood meal.
Consistent processing of animal blood into blood plasma or blood meal is a possible way of increasing the profitability of abattoirs even further. Obtaining blood plasma in particular opens up lucrative opportunities because this product is very much in demand from a wide variety of industries due to the valuable constituents it contains. Blood plasma is used as an additive in the food sector as well as in the pharmaceutical and pet food industries.
Blood is composed of cellular and liquid components. Plasma remains when the corpuscles are removed from liquid blood. To prevent the blood from clotting, an anticoagulant is added when the blood is collected from the arteries of slaughtered animals. Calcium-binding substances such as citrates are suitable for this purpose. Clotting is unable to start as a result of thrombin formation being inhibited.
From an economic point of view this is very sensible process management because it saves steam and thus energy. This saving is made possible by the liquid phase from the decanter – the plasma – being fed back into the heat exchanger, allowing direct steam for coagulation to be reduced. The wet blood meal now only needs to be dried. As blood meal recovery is primarily a disposal activity, mechanical dewatering is of interest to abattoirs if for no other reason than because it allows the high disposal cost to be reduced effectively.