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Article

Feasibility Study of Anaerobic Codigestion of Municipal Organic Waste in Moderately Pressurized Digesters: A Case for the Russian Federation

by
Andrey A. Kovalev
1,*,
Elza R. Mikheeva
2,
Dmitriy A. Kovalev
1,
Inna V. Katraeva
3,
Svetlana Zueva
4,
Valentina Innocenzi
4,
Vladimir Panchenko
1,5,
Elena A. Zhuravleva
6 and
Yuri V. Litti
6
1
Department of Renewable Energy, Federal Scientific Agroengineering Center VIM, Moscow 109428, Russia
2
Laboratory of Resource-Saving Biotechnologies, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod 603022, Russia
3
Department of Water Supply, Sanitation, Engineering Ecology and Chemistry, Nizhny Novgorod State University of Architecture and Civil Engineering, Nizhny Novgorod 603000, Russia
4
Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
5
Department of Theoretical and Applied Mechanics, Russian University of Transport, Moscow 127994, Russia
6
Laboratory of Microbiology of Anthropogenic Habitats, Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences, Moscow 119071, Russia
*
Author to whom correspondence should be addressed.
Appl. Sci. 2022, 12(6), 2933; https://doi.org/10.3390/app12062933
Submission received: 17 February 2022 / Revised: 9 March 2022 / Accepted: 10 March 2022 / Published: 13 March 2022
(This article belongs to the Special Issue Energy Optimization for Agriculture and Agroengineering Systems)
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Abstract

Anaerobic digestion (AD) is a promising option to obtain renewable energy in the form of biogas and reduce the anthropogenic impact on the environment. In recent years there has been increasing interest in using pressurized digesters to improve the quality of biogas. However, maintaining high overpressure increases the requirements for the explosion safety of digesters. Consequently, there are natural limitations in the available technologies and facilities suitable for full-scale operation. In this work, we aimed to evaluate the possibility of using overpressure in the digester to improve the efficiency of codigestion of common municipal organic waste–sewage sludge and the organic fraction of municipal solid waste. Three levels of moderate excess pressure (100, 150 and 200 kPa) were used to meet requirements of existing block-modular anaerobic bioreactors based on railway tanks, which are widely utilized for AD in the Russian Federation. There was no significant change in methane content in biogas (65% ± 3%) at different values of overpressure, hydraulic retention time (HRT) and organic loading rate (OLR). The maximum methane and energy production rates (2.365 L/(L·day) and 94.27 kJ/(L·day), respectively) were obtained at an overpressure of 200 kPa, HRT of 5 days and OLR of 14 kg VS/(m3·day). However, the maximum methane yield (202.44 mL/g VS), energy yield (8.07 kJ/g VS) and volatile solids (VS) removal (63.21%) were recorded at an overpressure of 150 kPa, HRT of 7 days and OLR of 10.4 kg VS/(m3·day). The pressured conditions showed better performance in terms of AD stability at high OLRs.
Keywords: anaerobic codigestion; biogas; pressurized reactor; semipilot block-modular plant; high OLR anaerobic codigestion; biogas; pressurized reactor; semipilot block-modular plant; high OLR

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MDPI and ACS Style

Kovalev, A.A.; Mikheeva, E.R.; Kovalev, D.A.; Katraeva, I.V.; Zueva, S.; Innocenzi, V.; Panchenko, V.; Zhuravleva, E.A.; Litti, Y.V. Feasibility Study of Anaerobic Codigestion of Municipal Organic Waste in Moderately Pressurized Digesters: A Case for the Russian Federation. Appl. Sci. 2022, 12, 2933. https://doi.org/10.3390/app12062933

AMA Style

Kovalev AA, Mikheeva ER, Kovalev DA, Katraeva IV, Zueva S, Innocenzi V, Panchenko V, Zhuravleva EA, Litti YV. Feasibility Study of Anaerobic Codigestion of Municipal Organic Waste in Moderately Pressurized Digesters: A Case for the Russian Federation. Applied Sciences. 2022; 12(6):2933. https://doi.org/10.3390/app12062933

Chicago/Turabian Style

Kovalev, Andrey A., Elza R. Mikheeva, Dmitriy A. Kovalev, Inna V. Katraeva, Svetlana Zueva, Valentina Innocenzi, Vladimir Panchenko, Elena A. Zhuravleva, and Yuri V. Litti. 2022. "Feasibility Study of Anaerobic Codigestion of Municipal Organic Waste in Moderately Pressurized Digesters: A Case for the Russian Federation" Applied Sciences 12, no. 6: 2933. https://doi.org/10.3390/app12062933

APA Style

Kovalev, A. A., Mikheeva, E. R., Kovalev, D. A., Katraeva, I. V., Zueva, S., Innocenzi, V., Panchenko, V., Zhuravleva, E. A., & Litti, Y. V. (2022). Feasibility Study of Anaerobic Codigestion of Municipal Organic Waste in Moderately Pressurized Digesters: A Case for the Russian Federation. Applied Sciences, 12(6), 2933. https://doi.org/10.3390/app12062933

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