Disc Centrifuges for Dairy Separation: Efficient Skimmed Milk & Cream Production

Disc Centrifuges for Dairy Separation: Efficient Skimmed Milk & Cream Production

In the field of deep processing of dairy products, the efficient separation of milk is a key link in enhancing product added value and expanding product lines. With the growing market demand for skimmed milk, milk fat, casein, and various milk protein products, traditional methods such as static settling or simple filtration can no longer meet the modern dairy industry's requirements for separation efficiency, product purity, and production scale. The adoption of advanced disc centrifuges for milk separation is becoming the preferred solution for the industry to overcome processing bottlenecks and achieve quality and efficiency improvements.

Process Challenges in Milk Separation

Milk is a complex liquid food rich in various nutritional components, mainly including milk fat globules, whey proteins, casein micelles, lactose, and minerals. These components are widely used in liquid milk standardization, cheese making, milk powder production, butter extraction, and high-end functional dairy ingredients. However, milk is perishable, may contain somatic cells and impurities, has delicate components, and is sensitive to physical stability.

Traditional separation methods often have limitations:

· Insufficient separation precision, making it difficult to completely separate fine fat globules or solid impurities.

· Long processing times, which can easily lead to microbial growth and affect product hygiene indicators.

· High temperatures or intense mechanical action may damage the natural conformation of milk proteins or the structure of fat globules.

· Difficulty in achieving large-scale, continuous, and automated production, constraining capacity improvement.

Choosing disc centrifuges professionally designed by Liaoning Zhonglian enables gentle, rapid, and efficient continuous centrifugal separation in a fully enclosed system, maximizing the preservation of the natural properties and nutritional functions of milk components.

Working Principle of Liaoning Zhonglian Disc Centrifuges in Milk  Separation

1. Feed and Pretreatment   

Pre-filtered raw milk, maintained at a suitable temperature, is smoothly fed into the centrifuge bowl via a feed pump. Pretreatment ensures uniform milk fluidity, preventing fat solidification or protein flocculation from affecting separation efficiency.

2. High-Speed Centrifugation and Disc Separation   

Under the powerful centrifugal force field generated by high-speed rotation, the milk enters the separation zone composed of stacked conical discs. The denser skimmed milk flows along the lower surfaces of the discs towards the periphery, while the less dense milk fat globules gather towards the central axis, forming distinct light and heavy phases.

3. Continuous Split-Stream and Collection   

The separated light phase (milk fat/cream) is continuously discharged via a central centripetal pump, while the heavy phase (skimmed milk) is collected through channels at the bowl periphery, enabling uninterrupted separation and output. Solid impurities (e.g., somatic cells, fine particles) are ejected and accumulated in the solids holding space and can be discharged intermittently or continuously via an automatic desludging function from the bowl periphery.

4. CIP Cleaning and Maintenance   

The equipment is equipped with a CIP (Cleaning-in-Place) system, allowing for comprehensive cleaning and sterilization between batches or during product changes, ensuring compliance with food hygiene and safety standards and preventing cross-contamination.

Technical Features of Liaoning Zhonglian Disc Centrifuges in Milk Separation

· High-Efficiency Separation Capability : The disc stack significantly increases the effective settling area, enabling clear separation of milk fat and skimmed milk even at very high throughput rates.

· Gentle Process Conditions: The separation process is rapid, with short product heating time, helping to preserve milk's natural flavor and the activity of heat-sensitive components (e.g., immunoglobulins, whey proteins).

· Fully Enclosed Automated Operation: The entire system is hermetically sealed, preventing external contamination, while supporting PLC automatic control for precise adjustment and recording of parameters like flow rate and separation precision.

· Strong Adaptability: By adjusting rotation speed, disc stack configuration, and feed rate, it can flexibly meet process needs for milk with different fat contents and for different purposes (standardization, clarification, skimming).

· Easy Maintenance and Cleaning: The bowl and disc stack are typically made of stainless steel. The structure, though precise, is easy to disassemble, assemble, and clean, complying with the strict hygienic design standards of the dairy industry.

Process Benefits and Value Enhancement from Liaoning Zhonglian Disc Centrifuges

1. Acquisition of High-Quality Products: Obtain skimmed milk with high clarity and milk fat/cream with high purity, laying the foundation for producing high-quality downstream products like butter, cheese powder, and whey protein.

2. Efficient Standardized Production: Precisely control the fat content of skimmed milk and cream, enabling online, accurate milk standardization to meet different product formulation requirements.

3. Increased Processing Capacity and Economic Benefits: 24-hour continuous operation capability significantly improves raw milk processing efficiency, reduces unit energy consumption and labor costs, and increases overall production capacity.

4. Ensured Food Safety: Effectively removes impurities and somatic cells from milk, improving product microbiological indicators and sensory quality, and extending shelf life.

5. Full Resource Utilization: Efficient separation minimizes the loss of valuable components, achieving efficient utilization of all milk constituents.

Typical Application Scenarios

· Reception and initial separation (skimming, clarification) of raw milk.

·Standardization treatment prior to liquid milk production.

·Pretreatment for cream and butter production lines.

· Milk clarification and standardization before cheese production.

· Whey separation and clarification (after cheese production).

· Milk concentration and skimming before milk powder production.

· Recovery of valuable by-products from dairy processing lines.

Liaoning Zhonglian – Specializing in Centrifugal Separation Technology, Empowering Dairy Industry Upgrade

Facing the continuously rising demands of the global dairy market for quality, efficiency, and product innovation, the efficient deep processing of milk has become core to enhancing enterprise competitiveness. With over twenty years of professional expertise in the field of centrifugal separation, Liaoning Zhonglian provides customers with complete solutions from process consultation and equipment selection to installation and commissioning, empowering dairy enterprises to achieve technological upgrades and value enhancement.

Since its founding in 2001, Liaoning Zhonglian has consistently focused on the R&D and manufacturing of centrifugal separation technology. Its product range covers various models including disc centrifuges, tubular centrifuges, basket centrifuges, and decanter centrifuges, widely used in food, biotechnology, chemical, environmental protection, and other fields.

If you wish to learn more about the application details of disc centrifuges in milk separation and other dairy processing, please visit the official website of Liaoning Zhonglian (www.lnzonelink.com) or contact our technical engineers directly for targeted solution consultation and technical support.  (Contact：admin@lyzhonglian.com   )