Soy Protein Technology Plan

This program adopts alkali-dissolved acid precipitation method to prepare isolated protein.

3.1 Soybean pretreatment process

3.1.1 Process description: As the production process of edible soybean meal, the first requirement is that the impurity removal should be clean. It is necessary to remove organic impurities (such as roots, stems, leaves) and inorganic impurities (such as mud, stones, metal particles, etc.) in the oil. In addition, the lumps, diseases and insect pests, and mildew particles in the oil should be removed to ensure that the low-temperature meal meets the food-grade hygiene standards.

In order to ensure the above requirements, the process combination should be reasonable, the cleaning should be distinguished according to the difference of the physical properties of oil and non-oil, and the non-oil material should be removed as much as possible to ensure product quality and product yield. In the pre-treatment process Part of the soybean hulls should also be removed. The soybean hulls contain a lot of colloids and pigments, and its presence will cause the color and non-product substance content of the products (such as soybean oil and protein isolate) to exceed the standard. The effective removal of soybean hulls has a positive effect on the process and product quality. As a soybean pretreatment process for producing low-temperature soybean meal, the more important one is that while the soybean pellets are made into flake-shaped soybean greens, high-temperature heating cannot be used, and the water-soluble protein in the soybean greens cannot be denatured. Therefore, this process The design and selection of process parameters are extremely important. In the design of this process, the preservation rate of water-soluble protein is fully considered, and a reasonable soybean green sheet can be produced.