M. V. Turshatov, V. P. Ledenev, V. A. Krivchenko, A. O. Solovyev, V. D. Nikitenko, E. A. Kirillov
All-Russian Research Institute of Food Biotechnology – branch of the Federal Research Center for Nutrition, Biotechnology and Food Safety, ul. Samokatnaya, 4B, Moskva, 111033, Russian Federation
Abstract. During alcohol production from grain raw materials, one of the main technological stages is the heat treatment of the batch. Until recently, most distilleries used a "rigid" boiling scheme at a temperature of 140-150 C. However, the level of biotechnology development makes it possible to carry out almost complete hydrolysis of raw starch at temperatures not exceeding 90 C, which is much more profitable from the point of the rational use of energy resources. After heat treatment, regardless of the scheme, the boiled mass is successively cooled to the temperature of saccharifying (58-60 C) and fermentation (30-35 C). In this case, a significant amount of heat is released, which can be used to heat process water or batch. The research aimed to analyse the energy consumption and energy efficiency of the schemes of water-thermal and enzymatic processing of raw materials operating at distilleries with the development of a heat flow regeneration to reduce energy costs. As the initial data for calculations, we used averaged indicators for the consumption of raw materials and water, the alcohol yield, and the characteristics of the heat agent, taken at several distilleries in the Russian Federation. When raw materials are boiled according to the high-temperature ("rigid") scheme, the steam consumption is 21.37 kg per decalitre of alcohol, which is 1.9 times more than in the "soft" scheme. The calculated indicators of heat released during cooling of the boiled mass (20.60 and 10.55 kg/dL, respectively) are comparable to the amount of heat spent on heating it. To use the generated heat, a recuperation scheme has been developed by heating process water or batch. Mastering the developed technology at the distillery will allow to reduce steam consumption by more than 2 times when boiling raw materials according to the “soft” scheme.
Keywords: energy saving; alcohol production; batch heat treatment; heat consumption; profitability.
Author Details: M. V. Turshatov, Cand. Sc. (Tech.), head of the department; V. P. Ledenev, Cand. Sc. (Tech.), head of laboratories; V.A. Krivchenko, Cand. Sc. (Tech.), leading research fellow; A.O. Solovyev, junior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); V. D. Nikitenko, engineer-technologist; E.A. Kirillov, head of laboratory.
For citation: Turshatov MV, Ledenev VP, Krivchenko VA, et al. [Energy-saving aspects of grain processing technology into ethyl alcohol] // Dostizheniya nayki i tekniki APK. 2022;36(7):92-6. Russian. doi: 10.53859/02352451_2022_36_7_92.