Equilibrium Humidity as One of Important Energy-Efficiency Indexes in Drying of Food Powder Materials of Biological Nature

: pp. 90 – 97
Received: October 11, 2022
Revised: November 28, 2022
Accepted: December 05, 2022
Institute of Technical Thermal Physics, National academy of sciences of Ukraine
Institute of Technical Thermal Physics, National academy of sciences of Ukraine
Institute of Technical Thermal Physics, National academy of sciences of Ukraine
Institute of Technical Thermal Physics, National academy of sciences of Ukraine

Considering general trend of energy consumption, according to which the amount of consumed energy increases, its cost and scarcity continuously increase. The 10–12 % of all energy is spent on drying processes in the world. At the current stage of the development of dehydration processes in Ukraine and the world, an urgent problem has arisen in the creation and development of highly efficient thermal technologies that would ensure minimal energy consumption for the process and high quality of the material. When drying powdered food materials of a biological nature, equilibrium humidity is important, which allows you to determine the final moisture content. Energy costs for the dehydration process, term, storage conditions and quality characteristics of the product depend on this indicator. The tensometric (static) method of Van Bamelen was used to determine the equilibrium humidity of the studied samples depending on the relative humidity of the air. The article presents the results of research – the kinetic curves of water vapour adsorption of antioxidant functional powders and instant cooking products (dry borscht) based on them were obtained and the comparative characteristics of the studied samples were carried out.

  1. Netzel M., Stintzing F.C., Quaas D., Straß G., Carle R., Bitsch R., Bitsch I., Frank T. (2005) Renal excretion of antioxidative constituents from red beet in humans. Food Research International, 38, pp. 1051–1058. https://doi.org/10.1016/j.foodres.2005.03.016
  2. Peschel W., Sanchez-Rabaneda F., Diekmann W., Plescher A., Gartzіa I. at all. (2006) An industrial approach in the search of natural antioxidants from vegetable and fruit wastes. Food Chemistry, 97, pp. 137–150. https://doi.org/10.1016/j.foodchem.2005.03.033
  3. Method of obtaining red beetroot-lemon antioxidant dye: patent 102358, Ukraine: MPK А23 L1/27. No. а201211386; declared 02.10.2012, issued 25.06.2013, bul. No. 12, 4 p.
  4. Pitalua E., Jimenez M., Vernon-Carter E.J., Beristain C.I. (2010) Antioxidative activity of microcapsules with beetroot juice using gum Arabic as wall material food and bioproducts processing, 88, Issues 2–3, pp. 253-258. https://doi.org/10.1016/j.fbp.2010.01.002
  5. Grabowski S., Marcotte M. Le., Ramaswamy H. S. (2003) Drying of Fruits, Vegetables, and Spices. Handbook of Postharvest Technology: Cereals, Fruits, Vegetables, Tea, and Spices. New York, ISBN: 0-8247-0514-9. P. 653-696. https://doi.org/10.1201/9780203911310.ch23
  6. Petrova Zh., Sniezhkin Yu. (2018) Energy-efficient thermal technologies of functional raw materials processing: monograph, Naukova Dumka, 187 p. (in Ukrainian)
  7.  Petrova Zh., Sniezhkin Yu., Samoilenko K. (2021) Blending and drying of antioxidant raw materials: monograph. Vinnytsia: LLC Tvory, 107 p.
  8. Sniezhkin Yu.F, Petrova Zh.O, Samoilenko K.M, Slobodianiuk K.S. (2022) Heat and mass transfer processes of obtaining combined functional powders. Monograph, Tropea, 148 p. (in Ukrainian)
  9. Petrova Zh.O, Sniezhkin Yu.F, Samoilenko K.M. (2015) Thermal technology for the production of dry rations for hot food for military personnel. Problems of industrial heat engineering. Proceedings of the 9th international conference, p. 144.
  10. Ginzburg A.S. (1973) Fundamentals of the theory and technology of food drying. Moscow: Food industry, 528 p. (in Russian)
  11. Experimental Methods in Adsorption and Molecular Chromatography, Ed. Yu. S. Nikitina, R. S. Petrova (1990) Moscow: MGU 318 p. ISBN 5-211-00908-8. (in Russian)
  12. Petrova Zh., Samoilenko K.M. (2021) Adsorption Properties of Combined Vegetable Powders. Energy Engineering and Control Systems, Vol. 7, No. 1, pp. 38 – 47. https://doi.org/10.23939/jeecs2021.01.038
  13. Sniezhkin Yu.F, Boryak L.A., Khavin A.A. (2004) Energy-saving thermal technologies for the production of food powders from secondary raw materials: monograph. Naukova Dumka, 228 p. (in Russian)
  14. A.H. AL-Muhtaseb, W.A.M. Mcminn and T.R. A. Magee (2002) Moisture sorption isotherm characteristics of food products: A review. Food Process Engineering Research Group, School of Chemical Engineering. 80, pp. 118-128. https://doi.org/10.1205/09603080252938753
  15. Greg S., Sing K. (1984) Adsorption, specific surface, porosity. Mir, 310 p. (in Russian)
  16. Keltsev N.V. (1984) Fundamentals of adsorption technology. Moscow, 592 p. (in Russian)
Zh. Petrova, K. Samoilenko, Yu. Novikova, P. Petrov. Equilibrium humidity as one of important energy-efficiency indexes in drying of food powder materials of biological nature. Energy Engineering and Control Systems, 2022, Vol. 8, No. 2, pp. 90 – 97. https://doi.org/10.23939/jeecs2022.02.090