

Add to Cart
Parameter
Introduction:
Ultrasound homogenization technology is mainly used in dairy
products.
In natural state, the diameter of the fat globules is uneven,
ranging from 1 to 10 μm, generally 2 to 5 μm [1]. These fat
globules float on the surface of the milk to form a creamy layer
due to the buoyancy, so that milk is produced. Delamination. The
presence of these fat globules greatly affects the appearance and
taste of milk and dairy products. If the milk is homogenized, the
diameter of the fat globules can be controlled at about 2 μm. At
this time, the surface area of milk fat increases and the
buoyancy decreases, thereby avoiding stratification and achieving a
uniform effect. The unique effect of homogenization improves the
quality of the product from the aspects of appearance and taste.
Therefore, homogenization is a very important part of the
pretreatment process of milk products.
After the raw milk is homogenized, the appearance, taste, and
nutritional quality of the dairy product will be greatly improved,
so homogenization is an extremely important part of the
pretreatment process of dairy products. Due to cavitation and other
physical effects, ultrasonic waves have a homogeneous effect on
materials. Many studies have reported the homogeneous effect of
ultrasound on cow milk. Ultrasonicate 0.5 kg of milk using an
ultrasonic cell pulverizer. The results showed that the
homogenization effect of ultrasonic homogenization at 40 ℃ for 10
min was the best. The homogenizing effect of ultrasound on milk. At
a frequency of 40 k Hz and a power density of 0.8 W / cm2, the
homogenization of ultrasound was performed for 1 min. The average
particle size of fat globules was 0.584 µm, and the particle size
of 94% of fat globules was less than 1 µm. Schmidt studied the
homogenizing effect of ultrasound on milk. Under laboratory
conditions of 60 ℃ and 20 ± 1 k Hz, 4 ml of low-fat milk was
homogenized, and the average fat particle size after processing was
less than 1 µm. The effect of high-intensity ultrasound on milk fat
was studied. After sonication, the fat globule size decreased by
81.5%. Homogeneous effect of raw milk fat globules. The study found
that compared with traditional homogenization, high-amplitude
ultrasound has better homogenization effect on milk. Under 450 W
ultrasound for 10 min, the diameter of the fat globules was 0.725
µm; at 180 W, 10 min was similar to the traditional homogenization
effect. Studies show that compared with traditional methods,
ultrasound has a better homogenization effect on milk, and the
homogenization effect increases with the increase of homogenization
time and ultrasonic power. The combination of ultrasonic and
heating can achieve the dual effects of homogenization and
pasteurization. Human milk was homogenized by ultrasound and tested
for the effects of Ig A and Ig G antibodies, lactoferrin, and
bacterial content in human milk. The results showed that low
temperature ultrasonic homogenized milk can reduce fat loss without
destroying globulins Ig A, Ig G and lactoferrin.
Fermented dairy products are accepted by more people because of
their rich nutritional value and good flavor. Yogurt can not only
provide a large amount of calcium, phosphorus, magnesium, vitamin
A, riboflavin, but also a large number of micro-ecological
probiotics that are beneficial to the human body. Over the past 30
years, the yogurt industry has grown rapidly. In order to maintain
a fast growth rate, there should be some innovation in yogurt
processing technology, packaging, taste, texture and so on. Studies
have shown that milk treated with ultrasound can increase the
viscosity of yogurt and improve the quality of dairy products to a
certain extent. For example, acid production is stable and easier
to control. Among the indicators of aroma, appearance, color, and
taste, ultrasonic homogeneous yogurt performs best in terms of
aroma and appearance, etc .; it can increase the lactose conversion
rate, and it is suitable for lactose intolerant people The meaning
is extraordinary; the fermentation time is reduced; the water
retention and viscosity of the yogurt are increased, and the
syneresis is reduced.
Ultrasonic homogenizer also applied in:
• Cell disrupter (extraction of plant substances, disinfecting, enzyme deactivation)
• Therapeutic ultrasound, i.e. induction of thermolysis in tissues (cancer treatment)
• Decrease of reaction time and/or increase of yield
• Use of less forcing conditions e.g. lower reaction temperature
• Possible switching of reaction pathway
• Use of less or avoidance of phase transfer catalysts
• Degassing forces reactions with gaseous products
• Use of crude or technical reagents
• Activation of metals and solids
• Reduction of any induction period
• Enhancement of the reactivity of reagents or catalysts
• Generation of useful reactive species