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Cold pasteurization refers to a food preservation method that uses high pressure, gamma irradiation, UV light, and pulsed electric fields to kill pathogens and extend the shelf life of food and beverages. Of these methods, high-pressure processing (HPP) is the most widely used form of cold pasteurization.
At present, different types of food and beverage machinery are used for cold pasteurization processing. The main types are as follows:
High-pressure pasteurization machines are the main machines used for cold pasteurization. They use high pressure to eliminate pathogens without affecting food quality. This machine is mainly used for the cold pasteurization of meat, poultry, seafood, dairy products, fruit juices, and other beverages.
The gamma irradiation machine uses ionizing radiation to kill microorganisms in food. It is mainly used for the cold pasteurization of spices, herbs, dried vegetables, and certain types of nuts.
UV irradiation machines use a UV light source to kill microorganisms such as bacteria and viruses by damaging their DNA. They are mainly used for the cold pasteurization of water, beverages, and some liquid foods that can be processed in a continuous flow.
PEF processing machines apply short, high-voltage electrical pulses to liquid food products to inactivate microorganisms and enzymes. They are mainly used for the cold pasteurization of fruit juices, dairy products, and liquid eggs.
In addition to the above types of machines, there are some other kinds of machines, such as cold plasma machines and ozone treatment machines. The cold plasma machines use a plasma formed at low temperatures to achieve the cold pasteurization effect. They are mainly used in liquids and on the surface of food. The ozone treatment machines use ozone gas for sterilization and disinfection. They are mainly used for the cold pasteurization of water and the surface treatment of fruits and vegetables.
Pasteurization can be done at various temperatures, and the duration of the process can vary as well. The most common method of pasteurization heats the juice to 161 degrees Fahrenheit for 15 seconds, but cold pasteurization can vary in temperature and time. Cold pasteurization can be done at 50 degrees Fahrenheit for about 30 minutes, 100 degrees Fahrenheit for 1 minute, or 140 degrees Fahrenheit for a mere 0.1 second. This means that the flavor and nutritional values of the products are retained, which is a significant advantage for both manufacturers and buyers.
UV-c treatment machines are suitable for cold pasteurization, and they use ultraviolet light to kill microorganisms. These machines can process about 1.5 liters every minute. The machines have a lamp life of about 9000 hours, and they use a maximum of 40 watts. Such a machine has a height of 925 mm, a width of 140 mm, a length of 800 mm, and a weight of 85 kg. The voltage and power can vary, such as 220/50 in Hz, 0.05 kw, or 220/50 in Hz, 0.18 kw, depending on the model.
Pulsed electric field machines are suitable for liquid foods that have low and intermediate viscosity. They use electricity to kill bacteria and germs. These machines have a standard capacity of 5 tons per hour, a maximum capacity of 10 tons per hour, and a power rating of 30 kW. They have a height of 1340 mm, a width of 1100 mm, a length of 2045 mm, and a weight of 800 kg. Such a machine can be painted in either a stainless steel or carbon steel case. It has a processing time of about 1 to 3 seconds and a temperature of about 20 to 80 degrees Celsius. The input and output sizes can vary depending on the machine's model.
Maintenance of cold pasteurization
Cold pasteurization machines are widely used in various industries where heat treatment may damage products. Here are some usage scenarios of cold pasteurization machines in different industries.
Many food and beverage manufacturers use cold pasteurization machines to treat products such as fruit juices, dairy products, and beer. These drinks and foods can retain their original taste, texture, and nutrition without compromising quality. Additionally, cold pasteurization machines can help extend product shelf life, reduce the risk of contamination, and meet stringent food safety standards.
In the pharmaceutical and cosmetic industries, cold pasteurization machines are also widely used. For example, pharmaceutical companies use this machine to sterilize liquid drugs, injectable drugs, and biological products without damaging the active ingredients of the drugs. Similarly, cosmetic companies use this machine to process products such as lotions, creams, and makeup without compromising the efficacy of the ingredients.
Cold pasteurization machines are also used in the medical industry to sterilize medical devices and instruments. For example, hospitals, clinics, and medical laboratories use this type of machine to sterilize surgical instruments, endoscopes, and implants. This ensures that the medical equipment is safe and sterile, reducing the risk of infection for patients and medical staff.
In the agriculture and horticulture industries, cold pasteurization machines are also widely used. For example, fruit and vegetable processing companies use this machine to sterilize fresh produce, minimize the presence of pathogens and bacteria, and extend the shelf life of the products.
Cold pasteurization machines are also widely used in research and development. For example, in biotechnology and laboratory settings, these machines can be used to sterilize media, reagents, and samples without contaminating the research process. This ensures the accuracy and reliability of experimental results.
When choosing a cold pasteurization machine, it is important to look for the following features and specifications to ensure that it will meet the unique needs of their products and business:
Firstly, business buyers need to identify the type of cold pasteurization process required for their products. For example, if they need to use cold sterilization for liquids, they can opt for the machine that treats liquids directly or the one that treats liquid products in their final packaging, such as a HPP machine for juice. On the other hand, if they need to use cold pasteurization for surfaces or equipment, they can choose a UV disinfection machine or an electron beam machine.
Processing capacity refers to the amount of product a cold pasteurization machine can treat in a given time, usually measured in units per hour. Business buyers need to consider the demand of their business to ensure that the machine they choose can meet their production needs.
Business buyers need to ensure that the cold pasteurization machine they choose is compatible with the types of packaging used for their products. Whether it is cans, bottles, pouches, or other forms of containers, the machine should be able to effectively treat and seal the packaging to maintain product safety.
Business buyers need to ensure that the selected cold pasteurization machine complies with relevant safety and quality standards. For example, look for machines that are tested and certified by reputable organizations or meet relevant regulatory requirements. This can help ensure that the machine operates safely and effectively, thereby protecting product integrity and consumer safety.
It is also important to choose a reputable supplier with good after-sales support. Business buyers should choose a supplier that provides installation, training, and ongoing technical support for the cold pasteurization machine. This can help ensure that the machine is properly installed and maintained, and that staff are adequately trained to operate it.
Q1: What is the difference between UV and cold pasteurization?
A1: The main difference between UV pasteurization and cold pasteurization is the way in which energy is delivered to the product. Cold pasteurization subjects products to ionizing radiation, which can penetrate deep into the material. The radiation modifies the DNA of microorganisms, thereby killing them. UV pasteurization, on the other hand, is limited to the surface of products.
Q2: What are the benefits of cold pasteurization?
A2: Cold pasteurization has many benefits. It preserves the taste and quality of the food product. The method also does not require the use of chemicals. In addition, it does not generate heat, which can be important for some temperature-sensitive items.
Q3: Is cold pasteurization safe?
A3: Yes, cold pasteurization is a safe and efficient method of killing bacteria. The method has been used for decades and is approved by regulatory agencies such as the Food and Drug Administration. When used according to guidelines, cold pasteurization does not pose any risk to human health.
