The current production methods of bean protein mainly involve enzymatic hydrolysis or acid treatment. However, the purification process is complex, resulting in low yield and purity of the product. Moreover, during the enzymatic hydrolysis process, other by-products are generated, which affects its subsequent use. Therefore, developing a new production process for high-purity and low-cost bean protein is of great significance.
The soy protein membrane concentration equipment uses ultrafiltration technology to produce soy protein isolate, which can fundamentally change the traditional alkaline-acid sedimentation and washing method. It can significantly improve the product quality. The molecular weight of soy protein is relatively large, with over 95% of the molecules having a molecular weight of 20,000 or above. This enables the separation, purification, and concentration of soy protein isolate without phase changes, effectively avoiding the repeated denaturation and increased salt content during the acid-base regulation process in the traditional method, and significantly improving the protein purity (up to 92%) and reducing the ash content (≤ 4.0%).
Soy protein membrane ultrafiltration concentration technology:
An industrial device for concentrating soy milk protein using ultrafiltration membranes has been constructed. Compared with the traditional evaporation process, ultrafiltration in this device can achieve a higher solid content, save energy, and enable clean production. There have also been precedents for the application of tubular membrane ultrafiltration in the concentration of soy milk. In this device, the solid content has increased from 4% to 23%. The cutting molecular weight of the used tubular membrane is 20,000, and the operating temperature is between 40 and 50 degrees.
Characteristics of soy protein membrane concentration membrane:
This membrane system not only achieves the sterilization and impurity removal filtration of the raw liquid, but also realizes the separation of macromolecular substances and small molecular substances at room temperature; as well as the concentration of various effective soybean functional factors, water, and small molecular substances.
2. The membrane system has the characteristic of high separation efficiency. It is used for clarifying, sterilizing, and filtering the raw liquid, and can completely remove large molecular tannins, pectin, mechanical particle impurities, foreign substances, and various microorganisms in the raw liquid, which affect the quality of the product. The quality of the resulting product is stable.
3. Compared with traditional processes, the membrane system can achieve long-term stable and continuous industrial production, and it has good recoverability.
4. The membrane treatment system can reduce the discharge of wastewater and waste residue, effectively alleviating the environmental pressure on the enterprise, while shortening the production cycle, reducing system energy consumption, lowering equipment operation costs, and achieving continuous clean production.
5. The fully automatic control system will conduct centralized online monitoring of key operating parameters, achieving multi-functional early warning and interlock control. The control components are of high quality, which can effectively reduce the labor intensity of workers.
