A technology allows reuse of discarded milk for animal feed
Milk that cannot be marketed, because it contains colostrum or because it comes from animals that are under treatment, represents an estimated volume of 16 million liters in Argentina and, in general, is used for feeding calves. To be of productive value, it is essential to apply a treatment that allows eliminating the possible pathogens that it contains, capable of making animals sick, and thus avoiding economic losses of importance for producers. Pasteurization is the most used procedure to perform the elimination of microorganisms and, although it is effective, its disadvantages include its high cost and the decrease of nutrients by the action of the temperature.
In the knowledge of the problem, researchers from the Institute of Pathobiology of INTA are advancing in the development of an equipment - called sanitizer -, which, through the process of ozonation, eliminates the pathogens of bovine colostrum without damaging the antibodies contained in the milk. The key innovation is the ozonation method, a low-cost procedure that minimizes the impact on the nutritional quality of milk and whose application allows reuse of discarded milk for feeding calves safely. “Ozone is a highly unstable molecule that, when decomposed, produces free radicals; by ozonizing milk and colostrum, free radicals damage the membranes and DNA of microorganisms and inactivate them, ”said Winston Morris, a researcher at the Institute of Pathobiology at INTA, who carries out the study together with specialists Daniel Vilte, Sergio Garbaccio and Mariana Dunleavy.