Hydrolysis process of collagen protein from tannery waste materials for production of biostimulator and its mathematical model

Abstract

The paper is focused on an area of secondary processing of leather waste materials, which belongs together with a problem of waste formation and its disposal among the actual global issues. The emphasis is given to chrome-tanned waste which can represent a threat to the environment and human health because of the content of hexavalent chromium. This agent is classified as a carcinogen and its repeated exposure to human organism have hazardous impact. Secondary waste processing is a feasible solution against adverse effects resulting from waste materials. Economic and environment-friendly requirements are cardinal aspects of these ways of waste processing. The authors introduce the complex process of collagen protein hydrolysis gained from tannery wastes for the purpose of production inducers of resistance for agricultural plants. Along the treatment the chromium tanned shavings are three times hydrolyzed under different conditions. The intermediate products of the process find further applications. The process can be rank among closed-loop processes by its nature. Mathematical model for the third step of the whole process, the acid hydrolysis of enzymatic hydrolyzate based on balance equations for hydrolysis is presented.