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Source publication
This monograph contains a collection of recent research papers focusing on advancing existing technologies and developing new technologies to improve the environmentally friendliness and save resources during the production of elastic leather materials. The papers are organized based on the type of technological process used to preserve raw hides....
Citations
... In addition, these formulas are applicable not only to the proposed experiment but also to other experiments related to the measurement of deformation and filtration properties of semi-finished leather product. The degrees of reliability and accuracy of experimental data approximation were estimated by the correlation and variation coefficients [16]. The approximation accuracy indices for these formulas are quite satisfactory, and the reliability indices are high. ...
A study on deformation and filtration properties of a leather semi-finished product after chrome tanning are presented. The analytical dependences of compressive load on compressive (recovery) strain and moisture content of a leather semi-finished product are obtained. The empirical dependences of hydraulic gradient on filtration rates are determined for various compression ratios of the leather semi-finished product. It was revealed that with an increase in compressive load and moisture content of the leather semi-finished product, the compressive deformation increases. The shoulder section is subject to the greatest deformation, then the belly section and the least deformation is observed in the butt section. A linear relationship has been established between the hydraulic gradient and the rate of moisture filtration through the leather semi-finished product in the directions perpendicular and parallel to its surface.
Graphical abstract
The leather industry faces criticism for its environmentally harmful effluent generated by traditional processing methods exceeding the pollution load, and the major pollution load is analyzed in spent liquor of liming process. Conventional dehairing with sodium sulfide and lime could result in chemical oxygen demand (COD) exceeding 10,000 mg/L in wastewater. While some alternative techniques exist, they often have limitations. This review highlights the need for eco-friendly alternatives in the pollution-intensive dehairing and liming process. This review explores the promising potential of amylase and peroxidase enzymes derived from soybean hulls as a replacement for conventional dehairing chemicals. Studies have shown that soybean enzymes can effectively reduce COD in effluent by up to 70% compared with traditional methods. This innovative approach presents a more sustainable solution for leather processing, minimizing harmful effluent and its environmental impact. By embracing soybean enzymes, the leather industry could achieve sustainability without compromising product quality, potentially even reduce waste disposal costs, and create new opportunities for premium eco-friendly leather products.
