Membrane separation technology for soybean deep processing

Soy protein isolate is generally obtained by alkaline extraction and acid precipitation method, which involves separating the protein in soybeans with alkali, then separating it with a high-speed separator, followed by acid precipitation separation, neutralization and other steps to obtain soy protein isolate. The whey waste liquid discharged by this method contains a large amount of water-soluble protein, which is wasted. Secondly, improving protein purity is too difficult. The improvement of protein purity is achieved by reducing the material flow rate of the separator for separating fibers and protein solution. Introducing membrane separation technology in soybean deep processing can effectively increase protein content.

Shengchuan adopts integrated technology membrane technology for soybean deep processing, which solves the problems existing in traditional processes, greatly improves product separation accuracy, fundamentally changes on-site hygiene and labor intensity, and can fully utilize other by-products of soybean processing, greatly increasing the added value of the soybean industry chain and bringing new technological means to soybean deep processing enterprises.

Advantages of membrane separation technology for soybean deep processing:

1. Soy protein isolate, soy isoflavones, whey protein, oligosaccharides, etc. can be extracted from soybean meal; Ultrafiltration can separate soy protein isolate, whey protein, and oligosaccharides; Nanofiltration technology can desalinate, dehydrate, and concentrate oligosaccharides; Water treatment can be recycled and reused to solve the problem of wastewater discharge;

2. The entire membrane separation process is carried out at room temperature, which has a protective effect on the thermosensitive substances in soy protein isolate;

3. The membrane equipment can be fully controlled, with both semi-automatic and manual modes, low labor intensity, good hygiene conditions, and low operating costs;

4. The processing is a purely physical process without any phase transition. The low operating temperature of the equipment avoids various drawbacks of traditional processes.