Juice beverage sterilization What are the device requirements?

　　Regarding the sterilization of fruit beverages, the primary objectives are: first, to eliminate pathogenic and spoilage microorganisms contaminating the juice and to inactivate enzymes, thereby ensuring that the product remains stable during a specified shelf life when stored in sealed bottles, cans, or other types of packaging; second, to minimize any adverse effects on the juice’s nutritional content and flavor during the sterilization process. Sterilization of fruit beverages encompasses both thermal and cold sterilization methods.

　　Fruit beverages are heat-sterilized using fruit beverage sterilization equipment.

　　In thermal pasteurization of fruit juices, there are the pasteurization method (a low-temperature process that allows for prolonged sterilization), the high-temperature short-time method, and the ultra-high-temperature instantaneous sterilization method.

　　Heat sterilization is highly effective, but the high temperatures often adversely affect juice quality, leading to discoloration, deterioration of flavor, and nutrient loss.

　　Fruit juice beverages are disinfected with cold water using fruit juice beverage sterilization equipment.

　　Cold sterilization techniques fall into two categories: physical and chemical methods. Physical sterilization employs physical means—such as electric fields, magnetic fields, high pressure, electrons, and light—either individually or in combination, to achieve sterilization at low or ambient temperatures. Common physical sterilization technologies include: high‑voltage pulsed electric fields, pulsed intense light, high‑voltage electrostatic fields, photocatalytic processes using semiconductor materials, microwave sterilization, and irradiation.

　　Chemical sterilization involves the use of chemical agents to induce protein denaturation and coagulation in bacteria, disrupt enzyme activity, inhibit bacterial metabolism and growth, or compromise bacterial membrane integrity and physiological functions, thereby achieving sterilization. Common chemical sterilization methods include the use of hydrogen peroxide, ethylene oxide, sodium hypochlorite, and other chemical reagents.

　　Compared with thermal and chemical sterilization, physical sterilization has the following characteristics: (1) It delivers excellent sterilization efficacy, prevents nutrient loss caused by high temperatures, and better preserves the natural flavor of fruit juice. (2) It eliminates the risk of harm to human health posed by chemical reagents used in laboratory experiments. (3) It reduces environmental pollution from chemical reagents. (4) It imposes stricter requirements for the management of sterilization equipment used in fruit‑juice beverages.

　 　Juice beverage sterilization Scope of Application for the Equipment

　　Rapid heat transfer is required, and scraped‑surface or tubular heat exchangers are commonly used. This method is suitable for liquids or mixtures containing small particles. However, when dealing with highly viscous liquids or particle sizes exceeding 3 cm, heating must be controlled via thermal conduction; the process typically takes several minutes to meet sterilization requirements, which can adversely affect product quality, nutritional value, and sensory attributes.

　　Characteristics of high-temperature instantaneous sterilization:

　　(1) Accurate temperature control;

　　(2) High temperature, short sterilization time, significant sterilization efficacy, and minimal chemical changes;

　　(3) Suitable for continuous automated production.