In food production, nanofiltration membrane can achieve the main function

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Nanofiltration membranes play an important role in food production, bringing many advantages and innovative applications to the food industry due to their unique separation properties. The following are the main functions and application examples that nanofiltration membranes can achieve in food production:

1. Water treatment and waste water recovery

1. Water treatment and waste water recovery

1. Preparation and production water: Nanofiltration membrane can effectively remove most of the minerals, organic matter, microorganisms and some heavy metal ions in the water, while retaining some beneficial minerals, providing high-quality process water for food production. This is particularly important in industries such as beverages, dairy products and winemaking where water quality is critical to ensure the taste, color and stability of the final product.

2. Wastewater treatment and reuse: wastewater produced in the process of food production, such as dairy industry wastewater, fruit and vegetable processing wastewater, etc., through nanofiltration membrane technology for in-depth treatment, can greatly reduce COD (chemical oxygen demand), conductivity, remove harmful ions such as Cr, Pb, Ni, Cd, etc., to achieve the standard discharge of wastewater or recycling. This not only helps to reduce environmental pollution, but also helps enterprises to save water resources and reduce production costs.

What can nanofiltration membranes be used for in food production

2. Separation and concentration of nutrients and flavor substances

1. Fruit and vegetable juice concentration and clarification: Nanofiltration membrane can accurately intercept the pigment, pectin, protein and other macromolecular substances in fruit and vegetable juice, while allowing water and some small molecular sugars to pass through, so as to achieve fruit juice concentration and clarification, improve product quality and storage stability. For example, in the production of blueberry juice, nanofiltration membrane separation technology can not only retain the natural pigments and nutrients in the juice, but also remove bitter substances and improve the taste.

2. Purification and preparation of alcoholic and non-alcoholic beverages: Nanofiltration membrane can effectively remove impurities, tannins and other bad flavor substances in alcohol, improve taste, and adjust the alcohol, sugar content and mineral balance of the wine. In non-alcoholic beverages, nanofiltration can be used to remove odorous substances that affect taste, while maintaining the presence of beneficial minerals.

3. Dairy processing: Nanofiltration membrane is used in dairy production, which can separate whey protein, lactose, minerals and other components to achieve product differentiation and functional dairy product development. For example, nanofiltration technology can concentrate whey protein for high-protein foods or sports nutrition; At the same time, the whey wastewater is treated to recover its valuable components and reduce the waste disposal burden.

Iii. Extraction and purification of functional components and bioactive substances

1. Production of oligosaccharides such as trehalose: nanofiltration membrane technology, instead of traditional solvent extraction methods, can separate and extract oligosaccharides such as trehalose under normal temperature and no chemical reaction conditions, which not only reduces the production cost, but also avoids the damage of sugar activity caused by heat treatment, ensuring the nutritional value and biological activity of products.

2. Extraction of natural pigments, antioxidants, etc. : Nanofiltration membrane can separate natural pigments, polyphenols, flavonoids and other bioactive substances in a specific molecular weight range from plant raw materials for the preparation of food additives, health products or cosmetics raw materials, while reducing solvent use and environmental pollution.

4. Food safety and hygiene guarantee

1. Microbial interception: Nanofiltration membrane has good bacterial and viral interception performance, which can be used for aseptic filtration in the food production process or bactericidal treatment of end products to improve food safety level.

2. Prevent the migration of pollutants: nanofiltration membrane is embedded in the plastic wrap, packaging bag and other materials of packaged food, which can prevent pollutants (such as pesticide residues, heavy metal ions, etc.) from migrating to the interior of food and improve the shelf life safety of food.

5. Process optimization, energy saving and emission reduction

1. Alternative to traditional processes: nanofiltration membrane separation technology can replace some traditional separation methods (such as precipitation, evaporation, crystallization, etc.), simplify the process, reduce energy consumption, land use and equipment investment, and improve production efficiency.

2. Water saving and clean production: The waste water in the production process is recycled through nanofiltration membrane to realize the recycling of water resources and reduce the consumption of fresh water, which meets the construction requirements of green food factories.

In summary, the application of nanofiltration membrane in food production is extensive and in-depth, which not only improves the quality, safety and functionality of food, but also promotes the effective use of resources and the realization of environmental protection goals, and is an important tool to promote scientific and technological progress and sustainable development of the food industry. With the continuous innovation and optimization of membrane separation technology, its application potential in food production will be further released, bringing more possibilities and competitive advantages to the food industry.


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