Brief introduction to the application of filter sterilization method in different food processing (1)

With the progress of society and the development of science and technology, sterilization by filtration has been more and more used in the food industry, which has promoted the rapid development of the food industry. This article mainly introduces the application of filter sterilization in the food industry.

Application in wine production

Filter Sterilization of Pure Draft Beer

The production of pure draft beer does not undergo high-temperature sterilization and uses sterile filtration to filter out yeast and miscellaneous bacteria so that the beer is protected from heat damage and maintains the original fresh taste. The last process adopts strict aseptic filling to avoid Without secondary pollution, the shelf life can generally reach 180 days. Pure draft beer is different from ordinary draft beer. Although ordinary draft beer has not been sterilized at high temperatures, it uses a diatomite filter, which can only filter out yeast, but not miscellaneous bacteria. The shelf life of high-quality draft beer is generally 3-7 days.

Sterile filtration is a commonly used cold sterilization method at present. The beer filtered by a diatomaceous earth filter and fine filter is then filtered into a sterile filtration combination system, including a double deep layer sterile filtration system and a membrane sterile filtration system. . After sterile filtration, it is required to basically remove yeast and all other microbial vegetative cells (sterile filtration LRV ≥ 7), in order to ensure the biological stability of pure draft beer.

Filter Sterilization of Rice Wine

Because yellow rice wine is a kind of non-distilled wine, untreated raw wine contains a large amount of turbidity, colloid, bacteria, and other microorganisms. In order to improve the quality of yellow rice wine and prolong the storage time, yellow rice wine must be filtered and sterilized before being put on the market. Using filter sterilization instead of traditional steam sterilization can remove Escherichia coli and other miscellaneous bacteria and suspended impurities at a lower temperature, which plays an important role in reducing raw material consumption and production costs and improving the quality of yellow rice wine.

Filtration sterilization of liquor, wine, and other fruit wines

Use inorganic membranes to filter and sterilize liquor, wine, and other fruit wines. After filtration, not only can effectively remove microorganisms, but also can significantly improve the clarity of the product, maintain the color, aroma, and taste of the product, and increase the shelf life of the product.

Application in seasoning production

Filter Sterilization of Soy Sauce

Since the production process of soy sauce is mostly exposed to natural space, during the fermentation and decomposition process of raw materials, it is accompanied by the growth and reproduction of various microorganisms, such as bacteria, actinomycetes, yeasts, and other microorganisms. The existence of these fungi not only affects the normal decomposition of enzymes but also produces some strange odors and phenomena, resulting in soy sauce becoming stale or even deteriorating. After the soy sauce is produced, it is very important to kill or remove these miscellaneous bacteria in time to ensure the quality of the soy sauce. It can be seen from the production practice of soy sauce that the miscellaneous bacteria in soy sauce can be completely removed by using a filter membrane no larger than 0.5 μm in the filtration sterilization method.

Filter Sterilization of Vinegar

During the fermentation process of producing vinegar from dilute alcohol in the liquid state, the liquid product is turbid due to the existence of black bacilli, and the continuous cross-flow filtration of inorganic membranes (alumina and zirconia) is usually used to remove the black bacilli in the concentrate and make the liquid products Get clarified and can get out bacteria. With the improvement of people's living standards, people have put forward higher requirements for the color, aroma, taste, and hygiene indicators of condiments, and the filtration sterilization method has more social benefits and economic value.

Filter Sterilization of Juice Drinks

In the early 1980s, inorganic membrane filtration sterilization technology was widely used in the French fruit juice industry, mainly to remove bacteria, pectin, and crude protein that are easy to cause juice deterioration, and the quality of filtered juice is better than that produced by pasteurization. Fruit juices are more aromatic.

Applications in the field of water treatment

In the field of water treatment, ultrafiltration technology is mainly used in the advanced treatment of drinking water, surface water treatment, desalination of seawater, and reuse of reclaimed water. The quality of drinking water directly affects people's health. Ultrafiltration technology can effectively remove suspended solids, bacteria, viruses, heavy metals, fluoride, chloride, disinfection by-products, and pesticide residues in water that may pose a threat to health. It has the characteristics of a small footprint and high processing efficiency.

Wuxi Lenge Purification Equipments Co., Ltd. is a professional manufacturer of purification equipment, our products are suitable for pharmaceuticals, laboratories, food and beverage, electronics, etc. We also have stainless steel furniture. If you are interested in purification equipment and stainless steel furniture, please get in touch with us! You can contact us at 86-510-85189266. Or send an email to export@wxljjh.com.