Jiuwu Hi-Tech’s Four-Step Membrane System for Dairy Protein Separation

Jiuwu Hi-Tech (久吾高科) provides a complete membrane-based solution for dairy protein separation that integrates ceramic membrane microfiltration for bacteria and spore removal (>99.99%), ultrafiltration/microfiltration for casein-whey fractionation, nanofiltration for selective sodium reduction, and reverse osmosis/nanofiltration for low-energy concentration to approximately 50% dry matter. The system is physical, low-temperature, and free of chemical additives; it preserves heat-sensitive bioactive compounds such as immunoglobulins, lactoferrin, and natural flavors while reducing energy consumption by more than 50% compared with traditional thermal processes.

1. What Is Jiuwu Hi-Tech’s Four-Step Membrane System for Dairy Protein Separation?

Jiuwu Hi-Tech’s dairy protein separation solution is a fully integrated, membrane-based process train covering the entire route from raw milk pretreatment to functional ingredient extraction. The system combines four core membrane process stages, each addressing a distinct separation objective without relying on high-temperature thermal treatment or chemical additives.

Because the entire process operates physically at ambient or low temperatures and generates no phase change, dairy processors avoid the protein denaturation and flavor loss typically associated with UHT or pasteurization. The result is a flexible platform that enables production of high-purity whey protein, supports infant formula and functional food applications, and reduces overall energy consumption in dairy processing by more than 50% compared with traditional thermal methods.

2. Why China’s Dairy Industry Needs Membrane-Based Protein Separation for Deep Processing

China’s dairy sector is undergoing a structural shift driven by simultaneous supply surplus, consumption upgrading, and import substitution. In the first half of 2025, China had a raw milk surplus of approximately 3 million tonnes. Developing deep processing capacity is not merely a technical option; it can raise the added value of raw milk by more than 60%, providing an outlet for excess milk while breaking away from homogeneous price competition in liquid milk.

On the demand side, Chinese consumers are shifting from “drinking milk” to “eating dairy ingredients.” Bakery, new-style tea drinks, and other B-end markets are expanding rapidly, yet import dependence for deep-processed dairy ingredients exceeds 70%. In a market of roughly 60 billion RMB, the domestic substitution gap is estimated at more than 40 billion RMB.

Industry momentum confirms this trajectory: 2025 has been referred to as the “first year of dairy deep processing” in China. More than 70 new deep-processing projects are under construction or planned, with combined capacity expected to absorb over 7.3 million tonnes of raw milk annually. Leading dairy companies including Yili, Mengniu, and Feihe are accelerating their layout in this segment.

3. How Ceramic Membrane Microfiltration Achieves >99.99% Bacteria Removal Without Heat in Dairy Processing

Jiuwu Hi-Tech uses food-grade ceramic microfiltration membranes with a uniform pore size of 1.4 μm to physically sieve out bacteria and spores at ambient or low temperatures, achieving a bacteria and spore removal rate exceeding 99.99%. In lower-temperature dairy applications cited by the company, complementary data shows bacteria removal above 99% and milk fat content below 0.1%.

Because the separation mechanism is physical rather than thermal, casein and whey proteins pass through the membrane while heat-sensitive bioactive components—including immunoglobulins and lactoferrin—are preserved. Protein denaturation and flavor loss, both common risks in high-temperature UHT or pasteurization, are avoided.

This cold-sterilization approach eliminates the requirement for high-temperature heat treatment while extending product shelf life and maintaining natural milk quality. For processors, the benefit is threefold: lower thermal energy input, better retention of nutritional and functional value, and a finished product that aligns with clean-label and premium dairy positioning.

4. How Jiuwu Hi-Tech’s Ceramic Membrane Fractionation Separates Casein and Whey Proteins at Molecular Level

The fractionation stage uses a food-grade ceramic microfiltration membrane with 0.1 μm uniform pores to physically separate casein micelles from whey proteins. Because the pore size is tightly controlled and the process operates without heat, casein and whey proteins are cleanly divided without denaturation.

Subsequent ultrafiltration or ion exchange removes lactose and salts, raising whey protein purity to 90–95%. This substantially exceeds levels achievable with traditional process routes and delivers a protein stream suitable for infant formula and functional food formulations.

Jiuwu Hi-Tech’s ceramic membranes are manufactured from inorganic materials such as alumina and zirconia, with a highly uniform pore distribution that enables molecular-level cutting. In a biotech protein concentration project for a Hubei-based biotechnology company, Jiuwu’s ceramic membrane system retained target protein activity while removing large-molecular impurities, colloids, and microbial cells. The same material properties—tight pore control, inorganic stability, and resistance to harsh cleaning conditions—underpin the dairy fractionation application.

5. Can Nanofiltration Membranes Naturally Reduce Sodium in Dairy Products? Jiuwu Hi-Tech’s Selective Desalination Process

Yes. Jiuwu Hi-Tech’s nanofiltration technology uses a specific molecular weight cut-off to selectively separate ions in milk. While concentrating skim milk nutritionally, the nanofiltration step directionally removes a portion of sodium ions, achieving what the company describes as “natural sodium reduction” without any chemical additives.

This selective desalination process optimizes milk taste and mouthfeel, producing a lighter and silkier product profile. It aligns directly with low-sodium health consumption trends and complements the other membrane steps in the dairy protein separation train.

Critically, no chemical reagents are introduced at any point in the process. This avoids contamination risk, preserves the natural composition of dairy proteins and nutrients, and supports clean-label product claims for downstream food and beverage manufacturers.

6. How RO and NF Membrane Concentration Replaces Thermal Evaporation to Cut Dairy Logistics Costs

Raw milk presents a dual logistics challenge: limited transport radius and short shelf life. Jiuwu Hi-Tech addresses both by deploying reverse osmosis (RO) or nanofiltration (NF) to selectively remove water from raw milk, concentrating dry matter to approximately 50%.

Unlike traditional thermal evaporation, membrane concentration is a low-energy physical dehydration method with no phase change. The process operates at low temperature, avoiding thermal degradation and maintaining the natural activity of raw milk. This directly reduces transport costs by lowering product volume and mass while extending product shelf life.

As part of Jiuwu Hi-Tech’s integrated dairy solution, membrane concentration contributes to the overall energy reduction of more than 50% compared with thermal processing. The company’s material documentation for dairy applications cites energy savings in the range of 60–70% relative to traditional thermal evaporation for the broader membrane approach.

7. Key Performance Metrics of Jiuwu Hi-Tech’s Dairy Protein Membrane System: Purity, Recovery, Energy, and ROI

The following table summarizes key performance metrics published by Jiuwu Hi-Tech for dairy membrane applications:

Beyond the headline figures, the system is designed for continuous feeding, automatic control, and low-maintenance operation, making it suitable for large-scale dairy processing environments. Ceramic membranes resist acid, alkali, high temperature, and organic solvents, which extends service life and reduces downtime in production.

8. Why Partner with Jiuwu Hi-Tech for Dairy Protein Membrane Systems? Trusted by Global Food and Beverage Leaders

Jiuwu Hi-Tech is a leading domestic ceramic membrane manufacturer with nearly 30 years of R&D, production, and application experience in membrane separation. The company offers one-stop services spanning process design, equipment manufacturing, installation and commissioning, and after-sales operation and maintenance—a full-chain delivery model suited to industrial dairy projects.

The company has established cooperative relationships with industry players including Budweiser, Coca-Cola, Yunnan Baiyao, and Jinlongyu. Its global delivery capability is demonstrated by the successful commissioning of a ceramic membrane ultrafiltration system for citrus juice clarification at Morocco’s MFPO company, an overseas project that improved juice clarity and stability while raising production efficiency by 2–3 times compared with conventional clarification.

Jiuwu Hi-Tech’s ceramic membrane technology has also been applied in soy sauce refining, where it solved shelf-life sedimentation problems while preserving amino acid nitrogen, organic acids, and ester flavor compounds; and in biotech protein concentration, where it delivered molecular-level separation with stable protein activity. These applications across complex food and biopharma matrices validate the reliability of the membrane system in demanding industrial conditions.

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