Studying the Influence of Acoustic Cavitation and Avalanche-Streamer Discharge on the Quality of Raw Milk in Order to Achieve the Pasteurization Effect
Abstract
The article presents the results of the studies obtained in the investigation of the quality of milk processed with the use of physical methods of exposure - acoustic cavitation and avalanche-streamer discharge, in order to achieve a pasteurizing effect. It is shown that in the treatment of high-frequency ultrasonic oscillations (over 45 kHz) generated by an electric ultrasonic device of the submersible type of impulse action ”Activator-150”, the number of bacteria of the E. coli group decreased by almost 40%, which allows concluding that the chosen method of influence is effective for the destruction of sanitary and pathogenic (indicative) microflora in raw milk and achieve a certain pasteurization effect. Using low-frequency ultrasonic exposure (20-22 kHz) generated by the cavitation ultrasonic flow type reactor RKU, the raw milk indicators QMAFAnM (Quantity of Mesophilic Aerobic and Facultative Anaerobic Microorganisms) and number of Coliform bacteria did not change after processing, as well as physical and chemical indicators, apart from the indicators of particle fineness. It can be stated that low-frequency ultrasonic cavitation treatment is not effective in terms of achieving a pasteurizing effect. In order to achieve a pasteurization effect by applying avalanche-streamer treatment we assessed its effect on QMAFAnM - the microbiological background of milk. The use of avalanche-streamer discharge does not have the expectation effect on the total number of microorganisms in milk. It is advisable to use high-frequency acoustic cavitation for microbial biota inactivation and avalanche-streamer discharge to reduce spore bacteria contamination.
References
[1] Tepel, A. (2012). Chemistry and Physics of Milk. Translated from German. St. Petersburg, 8.
[2] Gorbatova, K.K. (1997). Biochemistry of milk and dairy products. M.: Light and food industries.
[3] Rogov, I.A. (2001). Electrophysical methods of food processing. Moscow: Agropromizdat.
[4] Rodionov, G.V., Khoruzheva, О.G., Pronina, E.V., Baduanova S.D. (2016) Influence of electromagnetic radiation on dairy products quality. Glavniy zootehnic. No. 3. pp. 71–76.
[5] Kuznetsov, V.V., Shiller G.G. (2003) Handbook of dairy production technologist: Technology and recipes, SPb.: GIORD.
[6] Technical regulations for milk and dairy products. (2009). no 88, Federal law. Moscow: Prospekt.
[7] Galstyan, A.G. (2009). Development of scientific foundations and practical solutions for technology improvement, improving the quality and expanding the range of canned milk. PhD dissertation thesis abstract – Moscow.
[8] Shestakov, S.D., Krasulya, О.N., Bogush, V.I., et.al. (2013). Technology and equipment for processing food using cavitation disintegration: Textbook for universities, St. Petersburg: GIORD.
[9] Potoroko, I.U. (2012). Scientific substantiation and practical aspects of consumer properties formation of dairy products obtained from raw materials in the territories of technogenic pollution. PhD dissertation thesis abstract. Moscow.
[10] Tikhomirova, N.A., Mogazi, A.H. El, Krasulya, О.N. et al. (2011). Cavitation; Energy saving in the production of reconstituted dairy products. Milk processing, no 7, pp.14–16.
[11] Leong, T. S. H., Zhou, M., Zhou, D., Ashokkumar, M., & Martin, G. J. O. (2017). The formation of double emulsions in skim milk using minimal food-grade emulsifiers – A comparison between ultrasonic and high pressure homogenisation efficiencies. Journal of Food Engineering, 219, pp.81–92. Doi:10.1016/j.jfoodeng.2017.09.018
[12] Lo, B., Gorczyca, E., Kasapis, S., & Zisu, B. (2019). Effect of Low-Frequency Ultrasound on the Particle Size, Solubility and Surface Charge of Reconstituted Sodium Caseinate. Ultrasonics Sonochemistry. Doi:10.1016/j.ultsonch.2019.03.016
[13] Barbosa-Cánovas, G. V., Ortega-Rivas, E., Juliano, P., Yan H. (2005). Food Powders: Physical Properties, Processing, and Functionality. Food Engineering Series. Kluwer Academic.Plenum Publishers: Springer.
[14] Ryabyi, V. A., Savinov, V. P., Yakunin, V.G. (2011) Obtaining uniform glow plasma of Capacitive discharge in the area of plasma processing of the substrate. Bulletin of Kazan technological University, pp. 36–40.
[15] Kondratyeva, О.E., Kuhno A.V., Makalskiy L.M., Tsekhanovich О.M. (2015) Purification of water from contaminants by using avalanche-streamer discharges, Proceedings of the Samara scientific center RAS. Vol. 14, no. 5 (2), pp. 673–677.
[16] GOST 5867-90. (2009). Milk and dairy products. Methods for Fat weight fraction determination: Official publication. Moscow: IPK Publishing house of standards: Standartinform.
[17] GOST 3624-92 (2009). Milk and dairy products. Titrimetric methods for acidity determination: Official publication. Moscow: IPK Publishing house of standards: Standartinform.
[18] GOST Р 55246-2012 (2012). Milk and dairy products. Determination of non-protein nitrogen using the Kjeldahl method. Moscow: IPK Publishing house of standards: Standartinform.
[19] GOST Р 54758-2011 (2011). Milk and milk processing products. Methods for density determination.
[20] GOST 3624-92. (2009) Milk and dairy products. Titrimetric methods for acidity determination Moscow: IPK Publishing house of standards: Standartinform.
[21] GOST 3624-92 (2009). Milk and dairy products. Titrimetric methods for acidity determination. Moscow: IPK Publishing house of standards: Standartinform.
[22] GOST 3626-73. (2009). Milk and dairy products. Methods for determination of moisture and dry matter. Moscow: Standartinform.
[23] GOST 3624-92. (1992) Milk and dairy products. Titrimetric methods for acidity determination. Moscow: IPK Publishing house of standards, Standartinform.
[24] GOST 25228-82 (2009). Milk and cream. Method for determination of thermal stability by alcohol sample. Moscow: IPK Publishing house of standards: Standartinform.
[25] Krus, G.N., Shalygina A.M., Volokitina Z.V. (2000). Milk and dairy products research methods. Moscow: Kolos.
[26] Krus, G.N., Obelets V.A., Katkova N.N., Tikhomirova N.A. (1999). Chemical composition and properties of milk. Moscow.
[27] GOST Р 54756-2011 (2011). Milk and dairy products. Weight fraction of whey proteins determination using the Kjeldahl method Moscow: IPK Publishing house of standards: Standartinform.
[28] GOST 32901-2014 (2014). Milk and dairy products. Methods of microbiological analysis.: IPK Publishing house of standards: Standartinform.
[29] GOST 32901-2014 (2015). Milk and dairy products. Methods of microbiological analysis. Paragraph 8.2. Rennet-fermentation test.: Official publication. Moscow: IPK Publishing house of standards: Standartinform.