Process for preparing an infant formula using freeze-drying
A technology for infant formula and formula milk powder, which is applied in dairy products, other dairy products, edible oil/fat containing fatty acid esters, etc., and can solve the problems of increasing the size of milk fat globules and affecting the reconstruction and absorption of milk protein
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[0087] Furthermore, there is no atomization step (ie, spray drying step). Therefore, according to a preferred embodiment of the present invention, the method does not comprise an atomization step.
[0088] An advantage of the present invention is that the method can be performed in a one-step manner to generate lipid globules of preferred particle size, i.e. only one homogenization step is required and no additional second step is required to generate the desired lipid Pellet size. The one-step process also leads to efficient production, especially in large factories.
[0089] Preferably, during the freeze-drying step, no further resizing of the lipid globules is required, so a common freeze-dryer can be used.
[0090] Advantageously, the size distribution of the lipid globules is maintained after the freeze-drying step, especially after subsequent reconstitution in an aqueous medium. Thus, after reconstitution with water, the lyophilized composition still exhibits these ch...
Embodiment 1
[0146] An infant formula milk powder was prepared comprising 12.1 wt.% protein, 50:50 wt.% mixture of casein and demineralized whey, 26.5 wt.% fat (vegetable oil blend), 52.4 wt.% on a dry basis Carbohydrates except galactooligosaccharides, 6.2wt.% galactooligosaccharides and 2.9wt.% vitamins, minerals, trace elements known in the art.
[0147] The aqueous phase comprising water soluble ingredients is prepared as known in the art and heat treated to prevent bacterial contamination, ie by pasteurization as known in the art. The mixture was heated to 50-60°C. The dry matter content of the aqueous phase is between 43 and 44 wt.%.
[0148] The lipid phase comprising fat-soluble components is prepared as known in the art. The vegetable oil mixture is also heated to 50-80°C and added to the water phase. The total solid content of the lipid phase and aqueous phase mixture is about 51-52wt.%.
[0149] Premix the lipid and aqueous phases using a low shear propeller agitator.
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