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DOI: 10.15507/2658-4123.030.202001.092-110
Energy Efficiency of Pretreatment of Digester Synthetic Substrate in a Vortex Layer Apparatus
Andrey A. Kovalev
Senior Researcher of Laboratory of Bioenergy and Supercritical Technologies, Federal Scientific Agroengineering Center VIM (5, 1st Institutskiy Proyezd, Moscow 109428, Russia), Ph.D. (Engineering), Researcher ID: F-7045-2017, ORCID: https://orcid.org/0000-0002-1983-3454, Scopus ID: 57205285134, This email address is being protected from spambots. You need JavaScript enabled to view it.
Dmitriy A. Kovalev
Senior Researcher of Laboratory Director of Bioenergy and Supercritical Technologies, Federal Scientific Agroengineering Center VIM (5, 1st Institutskiy Proyezd, Moscow 109428, Russia), Ph.D. (Engineering), Researcher ID: K-4810-2015, ORCID: https://orcid.org/0000-0002-3603-3686, This email address is being protected from spambots. You need JavaScript enabled to view it.
Victor S. Grigoriev
Chief Researcher of Laboratory Director of Bioenergy and Supercritical Technologies, Federal Scientific Agroengineering Center VIM (5, 1st Institutskiy Proyezd, Moscow 109428, Russia), D.Sc. (Engineering), Researcher ID: B-4331-2019, ORCID: https://orcid.org/0000-0001-6555-1864, This email address is being protected from spambots. You need JavaScript enabled to view it.
Introduction. Processing organic waste to reduce the anthropogenic impact on the environment remains an urgent task, one of the ways to solve which is the use of methods for bioconversion of organic matter of organic waste to produce gaseous energy carrier and high-quality organic fertilizers. One of the most important stages of anaerobic processing of organic waste in bioreactors is the stage of preliminary preparation of waste for fermentation, which can be carried out by a number of methods. However, the technical literature does not pay enough attention to the use of devices with a vortex layer for the preliminary processing of substrates. The aim of the work is to determine the energy efficiency of the organic waste pretreatment process in the vortex layer apparatus before anaerobic digestion.
Materials and Methods. An experimental installation was developed to study the process of organic waste pretreatment. A mixture of organic fraction of municipal solid waste and tap water in the ratio of 300 g/l served as a substrate for treatment in the vortex layer apparatus.
Results. The calculations confirmed that the condition for energy efficiency of processing substrate pretreatment of methane is met, despite the additional cost of electrical energy during the integration of this stage in the system of anaerobic processing.
Discussion and Conclusion. Integration of the process of organic waste pretreatment in the vortex layer apparatus before fermentation in anaerobic bioreactors into the system of anaerobic treatment of organic waste can improve both the energy efficiency of the system and the level of anaerobic decomposition of organic matter of waste. The specific amount of biogas energy produced in the digestion process in an anaerobic bioreactor with pretreatment of the substrate in the apparatus of the vortex layer fully compensates the energy cost of pre-treatment of the substrate in the vortex layer apparatus. The practical significance of the work is confirmed by an increase in the specific yield of commercial energy by 70% compared to anaerobic treatment in traditional methane tanks.
Keywords: anaerobic treatment, vortex layer apparatus, energy efficiency, bioconversion of organic waste, pretreatment of organic waste
Funding: The publication was prepared with the financial support of the Russian Foundation for Basic Research, research project No. 18-29-25042.
For citation: Kovalev A.A., Kovalev D.A., Grigoriev V.S. Energy Efficiency of Pretreatment of Digester Synthetic Substrate in a Vortex Layer Apparatus. Inzhenernyye tekhnologii i sistemy = Engineering Technologies and Systems. 2020; 30(1):92-110. DOI: https://doi.org/10.15507/2658-4123.030.202001.092-110
Contribution of the authors: A. A. Kovalev – analysis of literary sources, development of the experimental unit, calculation of energy efficiency, writing the draft; D. A. Kovalev – scientific guidance, problem statement, search and analysis of literary sources, development of the experimental unit, writing the draft; V. S. Grigoriev – search and analysis of literary sources, editing and revision of the text.
All authors have read and approved the final manuscript.
Received 02.09.2019; revised 16.10.2019; published online 31.03.2020
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