Cavitation Reactor for Pretreatment of Liquid Agricultural Waste

Alexey Abdrashitov, Alexander Gavrilov, Evgeny Marfin, Vladimir Panchenko, Andrey Kovalev, Vadim Bolshev () and Julia Karaeva ()
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Alexey Abdrashitov: Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, 420111 Kazan, Russia
Alexander Gavrilov: Department of Radio Electronics, Kazan Federal University, 420008 Kazan, Russia
Evgeny Marfin: Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, 420111 Kazan, Russia
Vladimir Panchenko: Department of Theoretical and Applied Mechanics, Russian University of Transport, 127994 Moscow, Russia
Andrey Kovalev: Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia
Vadim Bolshev: Federal Scientific Agroengineering Center VIM, 109428 Moscow, Russia
Julia Karaeva: Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, 420111 Kazan, Russia

Agriculture, 2023, vol. 13, issue 6, 1-15

Abstract: One of the most well-known methods of intensifying the process of anaerobic digestion is the pretreatment of raw materials. For the first time, the use of a jet-driven Helmholtz oscillator for biomass pretreatment is proposed. The design of the device is optimal for creating hydraulic cavitation; however, in this case, acoustic oscillations are generated in the system and resonance occurs. In this study, the optimal design of this device was determined for the subsequent design of a cavitation reactor. The diameter of the resonant chamber was varied in the range from 28.3 to 47.5 mm, and its length from 6 to 14 mm; in addition, the diameter of the outlet was changed from 6.1 to 6.3 mm. Based on the experimental data obtained, it was found that the optimal ratio of the length of the resonator chamber to the diameter of the inlet nozzle is 1.73, and the inner diameter of the resonator chamber to the diameter of the inlet nozzle corresponds to 5.5. Improving the technology of agricultural waste disposal will ensure their maximum involvement in economic circulation, reduce the consumption of traditional fuel and energy resources, and improve the technological and machine-building base, which makes it possible to produce competitive cavitation reactors.

Keywords: agricultural waste; cavitation; pretreatment; jet-driven Helmholtz oscillator; anaerobic digestion (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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