Published: 1/8/2024 | Views: 221
I. Basic Concepts of Hot Canning and Cold Canning
Canning technology plays a crucial role in beverage production, and product quality and safety. Hot and cold canning are two common canning methods that differ significantly in the process, applicable product types, and sterilization measures. In this blog, we will discuss the differences between these two canning methods and their sanitization treatments.
Hot filling is to fill the product into the bottle at about 90 degrees after high-temperature sterilizing, and after screwing the cap, use the temperature of the material itself to carry out the final sterilizing of the bottle and cap. This way, the product stays at high temperatures for a longer period, which causes more damage to its taste and nutrition. Common hot-filled drinks: PET bottles are harder, thicker, and generally hot-filled; roof packages are also part of the hot filling.
Cold filling is the product of ultra-high-temperature sterilization cooled to room temperature in an artificially created aseptic environment, filling into bottles or cartons sterilized with hydrogen peroxide; the cap is also sterilized by hydrogen peroxide screwed tight. Cold filling has less impact on the product's taste and nutritional quality, and PET material use is less, but the equipment investment is about one time more than hot filling. The aseptic cold filling is the concentrated juice jammed after sterilization, cooling irrigation into 220 liters of vats, with a shelf life of more than one year. Common cold filling drinks: general milk, bottled water, Huiyuan juice, and other cartons of pure fruit juice drinks are basically cold filling.
Raw material processing: fruits, tea, and other raw materials are cleaned, juiced, and filtered.
Heating sterilization: the beverage is heated to 85-95 degrees Celsius and kept for some time to kill microorganisms.
Filling and sealing: Fill the beverage into the pre-sterilized containers at high temperature and seal them immediately.
Cooling: The sealed containers are quickly cooled to prevent the beverage from being in a hot state for a long time and affecting the taste.Pre-cooling: The beverages are cooled to 4-10 degrees Celsius for cold canning.
Sterilization: Containers and lids are sterilized. Commonly used methods include peroxyacetic acid spray and UV irradiation.
Filling and sealing: Filling cooled beverages into containers in an aseptic environment and sealing them immediately.
Secondary Sterilization: Some cold canned beverages are sterilized twice after sealing to ensure product safety.
2. Applicable products
Hot canning is suitable for non-carbonated products such as fruit juices, tea beverages, sports drinks, functional beverages, and so on. These products can maintain stability at high temperatures; high-temperature canning can effectively kill microorganisms.
Cold canning suits carbonated drinks, beer, milk, lactic acid bacteria drinks, etc. It can maintain the beverage's flavor and carbonation bubbles while avoiding the impact of high temperature on the quality of the product.
Container Sterilization: Containers are steam or hot water sterilized before canning to ensure no microbial residue inside.
2. Cold Canning Sterilization
Sterilization of containers and lids: During the cold canning process, containers and lids must be strictly sterilized. Common sterilization methods include peracetic acid spray, UV irradiation, and steam sterilization.
Aseptic filling environment: Cold canning must be performed in an aseptic environment to prevent microorganisms in the environment from contaminating the beverage. Aseptic filling equipment and sterile air filtration systems are key technologies for cold canning.Here is a selection of Datong machines that are related to this news article.
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