I. Recovery and Reuse of Leather Waste Protein 

Pre-treatment: Firstly, the leather waste is subjected to pre-treatment to remove impurities and non-protein components, preparing for the subsequent protein extraction process. 

Extracting proteins: 

The protein was extracted through the process of pre-treatment → hydrolysis → decolorization → concentration → drying. 

Using biochemical processes, such as enzymatic hydrolysis or acid hydrolysis, the leather waste is decomposed into collagen peptides and amino acids. 

The extracted animal protein is rich in eighteen kinds of amino acids. It is highly nutritious and easy to absorb, making it an excellent additive for animal feed. 

The application of industrial protein powder: 

Industrial protein powder can be applied in various fields such as feed, fertilizer, and cosmetics. 

In the field of feed, as an additive for animal feed, it enhances the nutritional value of the feed. 

In the field of fertilizers, as the main component of organic fertilizers, it promotes plant growth. 

In the cosmetics industry, as components such as humectants and thickening agents, they enhance the quality and stability of cosmetics. 

II. Methods for Removing Heavy Metal Additives 

Hydroxide precipitation method, coagulation treatment method, oxidation-reduction treatment method, biochemical treatment method, heavy metal capture agent method: 

The recycling and reuse of leather waste protein not only helps to reduce environmental pollution, but also provides high-quality raw materials for multiple fields. At the same time, through effective heavy metal removal technology, 

It can ensure that the recovered protein products are safe and free from contamination, meeting the usage requirements of various industries. 

For many years, Wuhan Bona has been dedicated to the application process development of membrane separation technology. By integrating processes, membranes and equipment, it has accumulated rich experience in product purification and engineering scale-up. This not only solves manufacturing challenges but also improves product quality, and together with customers, it enhances the technical level of the industry.