| abstract |
A method for producing feed from waste leather production, including hydrolysis of their 2.5-3.0% solution of sodium hydroxide or potassium to swell waste, subsequent processing of 2.5-3.0% solution of sulfuric acid, washing with water and drying, characterized in that, in order to improve the quality of the feed by extracting chromium, before hydrolysis, the waste is maintained in a 0.8-1.2% formalin solution, and after treatment with sulfuric acid, 3.34, 5% is treated sodium chloride solution. (L |