INFLUENCE OF SURFACE MATERIAL PARAMETERS AND TEMPERATURE REGIMES ON ITS CONTAMINATION

The main sources of contamination of dairy raw materials are the technological equipment for collection, storage and transportation. The processes of reducing the degree of contamination of surfaces in contact with raw milk - washing and disinfection - are considered. According to the applied method of influencing pollution: chemical, physical, physico-chemical, the material of equipment surfaces in contact with raw materials is selected. Some adhesive properties of materials in relation to a pollutant (raw milk) and to a detergent and disinfectant (water, an aqueous solution of a detergent) were studied. The concept of contamination is a property of a material characterized by the ability to reduce the adhesive properties of a pollutant in contact with the surface, introduced to characterize the material. The results of an experimental study of the influence of material parameters (polymers and metals) and temperature regimes on the adhesion properties of a pollutant - milk with a fat content of 3.2% are presented in the work. An analysis of the results showed certain dependences of the surface contamination on the contact angle of wetting and the temperature regimes of the process. The following conclusions are made based on the results of the study: the surface material and temperature conditions have the same effect on the adhesion properties of both the pollutant and the detergent; the polymeric material is subject to less contamination, which is characterized by lower costs of the detergent during the washing process; the temperature regime directly affects the adhesive properties of the material, pollutant and detergent, while an increase in temperature reduces the wetting angle, and a decrease in temperature increases it; The roughness of the material affects the contact angle.