Investigation of microbial death kinetics during relativistic electron beam processing for Salmonella entrica as an example

Abstract

While processing plant raw materials, it is necessary to observe the balance of effective dose and quality for processed products. The solution to this problem may provide an adequate direction to determine the optimal processing criteria. For define the minimum processing criteria, information database is required, which makes it possible to determine the mechanisms of processing effect appearing. This base is also a key element in the construction of experimental work that allows improving the technology of applying physical methods in the food industry. The present work objective is to study the consistent patterns of pathogenic microorganisms’ inhibition depending on the electron beam energy and the accumulated dose on Salmonella entrica as an example. As the object of research the museum strain of Salmonella entrica subsp. enterica serovar Typhimurium ATSS 140283 cultivated on an artificial model medium was used. The results of the research showed a two-phase nature of the microorganisms’ death kinetics. This work is based on microorganisms’ death kinetics research. The models for the response of two subpopulations stable and unstable for relativistic electron beam processing have been developed. The distribution of the processing hardness with a subpopulation that is unstable to relativistic electron beam processing was established. The need to combine processing by a relativistic electron beam with other types of active exposure to achieve the maximum sterility rate for the entire population of microorganisms has been experimentally established.