The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge
The present study aimed to determine the effect of a 17.6 mT static magnetic field (SMF) on the efficiency of anaerobic digestion (AD) of municipal sewage sludge (MSS). The SMF had a significant impact on methane (CH<sub>4</sub>) production efficiency, the levels of fermentation rate (η&...
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MDPI AG
2021-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/3/590 |
| _version_ | 1797407905671020544 |
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| author | Marcin Zieliński Marcin Dębowski Joanna Kazimierowicz |
| author_facet | Marcin Zieliński Marcin Dębowski Joanna Kazimierowicz |
| author_sort | Marcin Zieliński |
| collection | DOAJ |
| description | The present study aimed to determine the effect of a 17.6 mT static magnetic field (SMF) on the efficiency of anaerobic digestion (AD) of municipal sewage sludge (MSS). The SMF had a significant impact on methane (CH<sub>4</sub>) production efficiency, the levels of fermentation rate (η<sub>F</sub>MSS) vs. removal rate (ηVS), and the structure of the anaerobic bacteria consortium, but it did not affect cumulative biogas production. The highest CH<sub>4</sub> yield (431 ± 22 dm<sup>3</sup><sub>CH4</sub>/kgVS) and the highest methane content in the biogas (66.1% ± 1.9%) were found in the variant in which the SMF exposure time was 144 min/day. This variant also produced the highest η<sub>F</sub>MSS and ηVS values, reaching 73.8% ± 2.3% and ηVS 36.9% ± 1.6%, respectively. Longer anaerobic sludge retention time in the SMF area significantly decreased AD efficiency and caused a significant reduction in the number of methanogens in the anaerobic bacteria community. The lowest values were observed for SMF exposure time of 432 min/day, which produced only 54.8 ± 1.9% CH<sub>4</sub> in the biogas. A pronounced reduction was recorded in the Archaea (ARC915) and Methanosaeta (MX825) populations in the anaerobic sludge, i.e., to 20% ± 11% and 6% ± 2%, respectively. |
| first_indexed | 2024-03-09T03:49:32Z |
| format | Article |
| id | doaj.art-7806821e03bb47c889fbe95ed6a97678 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T03:49:32Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7806821e03bb47c889fbe95ed6a976782023-12-03T14:29:21ZengMDPI AGEnergies1996-10732021-01-0114359010.3390/en14030590The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage SludgeMarcin Zieliński0Marcin Dębowski1Joanna Kazimierowicz2Department of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, PolandDepartment of Environment Engineering, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, PolandDepartment of Water Supply and Sewage Systems, Faculty of Civil Engineering and Environmental Sciences, Bialystok University of Technology, 15-351 Bialystok, PolandThe present study aimed to determine the effect of a 17.6 mT static magnetic field (SMF) on the efficiency of anaerobic digestion (AD) of municipal sewage sludge (MSS). The SMF had a significant impact on methane (CH<sub>4</sub>) production efficiency, the levels of fermentation rate (η<sub>F</sub>MSS) vs. removal rate (ηVS), and the structure of the anaerobic bacteria consortium, but it did not affect cumulative biogas production. The highest CH<sub>4</sub> yield (431 ± 22 dm<sup>3</sup><sub>CH4</sub>/kgVS) and the highest methane content in the biogas (66.1% ± 1.9%) were found in the variant in which the SMF exposure time was 144 min/day. This variant also produced the highest η<sub>F</sub>MSS and ηVS values, reaching 73.8% ± 2.3% and ηVS 36.9% ± 1.6%, respectively. Longer anaerobic sludge retention time in the SMF area significantly decreased AD efficiency and caused a significant reduction in the number of methanogens in the anaerobic bacteria community. The lowest values were observed for SMF exposure time of 432 min/day, which produced only 54.8 ± 1.9% CH<sub>4</sub> in the biogas. A pronounced reduction was recorded in the Archaea (ARC915) and Methanosaeta (MX825) populations in the anaerobic sludge, i.e., to 20% ± 11% and 6% ± 2%, respectively.https://www.mdpi.com/1996-1073/14/3/590municipal sewage sludge (MSS)anaerobic sludge (AS)anaerobic digestion (AD)static magnetic field (SMF)biogasmethane (CH<sub>4</sub>) |
| spellingShingle | Marcin Zieliński Marcin Dębowski Joanna Kazimierowicz The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge Energies municipal sewage sludge (MSS) anaerobic sludge (AS) anaerobic digestion (AD) static magnetic field (SMF) biogas methane (CH<sub>4</sub>) |
| title | The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge |
| title_full | The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge |
| title_fullStr | The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge |
| title_full_unstemmed | The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge |
| title_short | The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge |
| title_sort | effect of static magnetic field on methanogenesis in the anaerobic digestion of municipal sewage sludge |
| topic | municipal sewage sludge (MSS) anaerobic sludge (AS) anaerobic digestion (AD) static magnetic field (SMF) biogas methane (CH<sub>4</sub>) |
| url | https://www.mdpi.com/1996-1073/14/3/590 |
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