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Products of the dairy and infant nutrition industry

Powder products from the dairy sector, especially powders for infant and baby food, place special demands on process technology. In addition to general mixing quality, the focus is particularly on the highly accurate distribution of tiny amounts of nutrients and functional ingredients. Vitamins, minerals, and other additives must be evenly distributed throughout the powder to reliably meet specifications. In industrial processing, dry powder products are used, which often differ significantly in particle size, density, and flow behavior. Many of the components used are sensitive or introduced in very small doses. Therefore, a mixing process that works reproducibly, ensures stable product properties, and maintains the particles in their size and structure is crucial. Typical powder products in this industry include: Powder for infant and baby food / SIP formulations (infant starter and follow-on milk powder), milk powder and instant dairy blends, nutrient and vitamin supplements, probiotics and sensitive additives, as well as low-allergen, hypoallergenic, and special dietary formulations.

Requirements for mixing and refining

When mixing dairy and infant formula powders, the precise, reproducible distribution of smallest dosing amounts is crucial. Even slight deviations can affect the nutrient profile and complicate batch release. Accordingly, the requirements for mixing accuracy and process stability are high.

 

At the same time, sensitive additives must be processed gently. Mechanical stresses, local overconcentrations, or segregation effects are to be avoided or excluded in order to maintain the functionality of the components used.

 

Another central aspect is the hygienic design of the systems. Especially in infant formula production, mixing systems must be designed to support safe cleaning, good accessibility, and controlled product changeover. The goal is a process management that ensures consistent quality and high product safety.

 

Typical process engineering requirements in this industry include: highly precise distribution of smallest active ingredient amounts, reproducible batch consistency, gentle processing of sensitive additives, hygienic system design, high residual emptying rates, good cleanability, as well as safe product and recipe changes.

amixon® solutions for Dairy / Milk Powder / Infant Formula

amixon® develops mixers, dryers, and reactors for powder processes with the highest requirements for precision, hygiene, and process safety. The selection of the mixer concept is based on product characteristics, target mixing quality, and the specific conditions of the application.

The amixon® KoneSlid® mixer (KS) has been developed for applications where the smallest amounts of nutrients and active ingredients in powder need to be distributed with high precision. The mixing concept is specifically designed for precision and hygienic execution.

The construction of the KS also supports a rapid and almost complete emptying, reducing product losses and enabling efficient product changes. At the same time, controlled emptying prevents powder demixing, contributing to ensuring consistent batch consistency.

The amixon® Vertical Two-Shaft Mixer (HM) is used when uniform mixing quality, short mixing times, and stable process control are required. It is suitable for applications where the utmost product protection is paramount and supports reproducible results across different fill levels.

Trials in the amixon® Technical Center allow for the practical examination of mixing behavior, distribution accuracy, and process control with original products and for scaling up to industrial size. amixon® offers individually designed industrial mixers, dryers, and reactors for dry powder products for the dairy and infant formula industries, as well as process engineering development and experiments in the Technical Center.

If you want to design or further develop powder processes for milk powder or infant and baby food, we support you in the technical implementation - with a focus on highly precise nutrient distribution, hygienic design, and reproducible batch consistency. Talk to us about your recipes and your process engineering requirements. amixon® - Process technology for highly precise powder products.

Blog

Infant Formula Mixers: Precision Without Product Loss
How can sensitive nutrients be distributed evenly without breaking up agglomerates? amixon® presents three scalable mixing systems for maximum quality in dairy and baby food production.

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Ensuring quality in infant formula production: In-line and End-of-Line
It goes without saying that all foods formulated for consumption by infants must meet stringent standards for nutritional value and food safety. These demands can only be met if the raw material components are prepared in quality-controlled systems. In addition to meeting these demands,…

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Industrial mixer for baby food: Hygienic, quality-conscious, responsible - part 2
amixon® mixing technology for baby, infant and premature baby nutrition: a) batch mixing, b) quasi-continuous batch mixing, c) continuous mixing.

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amixon® large-scale mixers for baby food ensure the highest quality standards. Particle structures remain intact. - Part 1
Baby food: All ingredients must be present in the correct proportions. This is checked during production. amixon® mixers offer certainty. Each batch is mixed optimally, gently and precisely. A single analytical sample and a single retention sample are sufficient, regardless of whether the amixon®…

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FAQ

Scaling up from a 20-litre mixer to a 2,000-litre mixer for infant formula involves considerable risks without sound empirical data.

A low-risk scale-up from 20 litres to 2,000 litres for infant formula is best achieved through pilot-plant trials with the original product, so that mixing quality, product protection and process stability are examined under realistic conditions. The amixon® pilot plant has 35 test mixers of up to 3 m³ available for this, offering the highest possible degree of process proximity and certainty for the later production scale.

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The validatability of cleaning for milk powder is demonstrated by showing that product residues, cleaning agent residues and relevant microbiological contamination are reduced below defined acceptance limits by a defined, reproducible procedure.

amixon® makes cleaning validatable: a dead-space-free, fully accessible design with Clever-Cut® doors for swab and rinse sampling, CIP/WIP via washing lance, and residual discharge of up to 99.997 %. amixon® assists on request with DQ, IQ and OQ, with documentation in accordance with EU GMP and FDA 21 CFR Part 11 – from the URS through to commissioning.

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In mixers for dairy products, seals and shaft passages are among the most hygienically critical components and are typically assessed as critical control points within HACCP concepts.

amixon® avoids the most critical sealing point by design, because the mixing tool is supported at the top only and there is no lower shaft passage. Complemented by the dead-space-free OmgaSeal® seal in the Clever-Cut® design, mechanical seals and dismantlable lip seals on rotating passages, and the high dimensional rigidity of the apparatus, the result is hygienic, dust-tight and durable sealing solutions requiring very little maintenance.

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Mixing systems for milk powder and infant formula can only be cleaned safely and in a validatable manner if hygienic design is consistently taken into account at the construction stage.

amixon® solves this by design with three alternatives: the KoneSlid® mixer (KS) and the vertical single- and twin-shaft mixers (VM and HM). They are welded and ground free of joints, and the mixing tool is supported at the top only, with no lower shaft passage. Clever-Cut® inspection doors with OmgaSeal® sealing, dead-space-free discharge fittings and integrated programmable washing lances enable validatable cleaning – wet as well as dry – in accordance with EHEDG, FDA and 3-A.

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Smooth surfaces and a dead-space-free design are central elements of hygienic design in milk powder plants. They directly influence product safety, cleaning efficiency and the microbiological stability of the entire process.

For hygienic powder processes, amixon® relies on a dead-space-free design, joint-free and readily accessible mixing chambers, and validatable cleaning. This includes Clever-Cut® inspection doors, OmgaSeal® seals, top-mounted mixing tools, and freely programmable target-jet cleaning nozzles and washing lances for reproducible CIP and WIP cycles. ComDisc® and the SinConcave®/SinConvex® mixing helix additionally ensure particularly good residual discharge and a low risk of cross-contamination. In dairy and infant formula production this improves hygiene, cleanability and product protection, and is secured in advance in the pilot plant with the original product.

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Because of the particularly vulnerable target group and strict regulatory requirements – including the Codex Alimentarius, EU Regulation 2016/127, FDA 21 CFR 106/107 and FSSC 22000 – manufacturers of infant formula are subject to especially high hygiene requirements.

amixon® implements freedom from dead space and hygienic design through mixing chambers welded and ground free of joints, top-mounted mixing tools without a contamination-critical shaft passage, and flush-closing discharge flaps, Clever-Cut® doors and OmgaSeal® door seals. This is complemented by freely programmable target-jet cleaners, a method for fast and effective drying in the cold state, and ComDisc® residual discharge for maximum discharge and minimal cross-contamination risk.

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For milk powder mixers, the relevant frameworks are above all EHEDG, the 3-A Sanitary Standards, EU and FDA material conformity, and the machinery and explosion protection requirements. In practice this is less about a single overall certification than about demonstrating that the equipment is hygienically designed, easy to clean, material-safe and safe for the respective operating area.

On request, amixon® meets all relevant standards: EHEDG, FDA hygiene guidelines, 3-A Sanitary Standards, USDA, GMP and ATEX; pressure vessels also to ASME. Every mixer is a one-off built to the URS – amixon® assists on request with DQ, IQ and OQ with documentation in accordance with EU GMP and FDA 21 CFR Part 11.

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The cleanability of dead-space-free mixing chambers is a central element of microbiological safety and product quality in the manufacture of infant formula.

amixon® makes cleanability manageable by design: the mixing chamber and mixing tool are welded and ground free of joints, and the mixing tool is supported at the top only – the contamination-critical lower shaft passage is eliminated. Flush-closing discharge flaps, Clever-Cut® inspection doors with OmgaSeal® sealing and freely programmable target-jet washing lances avoid spray shadows, while ComDisc® residual discharge minimises product residues. Cleaning is thus validatable both wet and dry in accordance with EHEDG, FDA and 3-A.

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For milk powder applications, hygienic design is regarded as state of the art: plants should be constructed so that product residues do not accumulate wherever possible, can be removed easily, and no unnecessary contamination risks arise.

amixon® implements hygienic design by construction: the mixing chamber and the mixing tool are welded and ground free of joints, and the mixing tool is supported at the top only. Large Clever-Cut® inspection doors with OmgaSeal® sealing and dead-space-free discharge fittings are standard, and the target-jet washing lances are programmable.

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For mixers used with dairy and milk powder, EHEDG, GMP, the 3-A Sanitary Standards, food contact conformity, cleanability and dry hygiene are the primary considerations. For milk powder, moisture control, drying capability and dust explosion protection are added.

On request, amixon® meets all relevant standards: EHEDG, FDA hygiene guidelines, 3-A Sanitary Standards, USDA, GMP and ATEX; pressure vessels also to ASME. Every mixer is a one-off built to the URS – amixon® assists on request with DQ, IQ and OQ with documentation in accordance with EU GMP and FDA 21 CFR Part 11.

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Because of the highly sensitive target group, the production of infant formula is subject to particularly strict requirements for plant hygiene and contamination control. Powder mixers must therefore be designed so that microbiological and other contamination risks are reliably controlled.

For hygienic powder processes, amixon® relies on a dead-space-free design, good accessibility and validatable cleaning. Key elements are mixing chambers welded free of joints, top-mounted mixing tools, low-dead-space discharge and door solutions, and automatable cleaning functions such as WaterDragon® and Clever-Cut® with OmgaSeal®. Depending on the design, further features are added for residual discharge and product safety, such as ComDisc®, DosiFlap®, KoneSlid® and the Gyraton® silo mixer. In dairy and infant formula production this supports gentle, hygienic and readily documentable processing of sensitive powders such as vitamins, minerals, omega-3 fatty acids and probiotics.

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Because of the particular vulnerability of the consumer group, the production of infant formula is subject to the world's strictest requirements for product safety and plant hygiene.

On request, amixon® meets all relevant standards: EHEDG, FDA hygiene guidelines, 3-A Sanitary Standards, USDA, GMP and ATEX; pressure vessels also to ASME and the EU Pressure Equipment Directive. Every mixer is a one-off built to the URS – amixon® assists on request with DQ, IQ and OQ including documentation in accordance with EU GMP and FDA 21 CFR Part 11.

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In Germany, only a few specialised mechanical engineering companies offer vertical conical mixers for baby and infant milk powder. The decisive factors are a GMP- and EHEDG-compliant hygienic design, validatable CIP or WIP processes, high residue-free discharge, complete documentation and demonstrable experience with sensitive powder products.

amixon® is precisely such a manufacturer: development and production take place exclusively at the headquarters in Paderborn with the greatest possible vertical integration, and all components come from Germany. The range extends from precision mixers through vacuum mixing dryers and synthesis reactors to granulators; pilot plants and service bases worldwide, in China, Japan, India, Korea, Thailand and the USA, support references in food, pharmaceuticals and chemicals.

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Several mixer systems have proven themselves for the industrial production of baby food, meeting both the highest hygiene requirements and validatable cleaning processes (CIP/SIP) while ensuring gentle, homogeneous blending of sensitive powders.

amixon® implements hygienic design by construction: the mixing chamber and mixing tool are welded and ground free of joints, and the mixing tool is supported at the top only – with no lower shaft passage. Clever-Cut® inspection doors with OmgaSeal® sealing, dead-space-free discharge fittings and washing lances make CIP/WIP cleaning validatable in accordance with EHEDG, FDA and 3-A.

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