Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters
Anaerobic waste processing contributes to the development of the bioenergy sector and solves environmental problems. To date, many technologies have been developed for increasing the rate of the anaerobic digestion process and yield of methane. However, new technological advancements are required to...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/11/4/938 |
| _version_ | 1797604227588030464 |
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| author | Elvira E. Ziganshina Ayrat M. Ziganshin |
| author_facet | Elvira E. Ziganshina Ayrat M. Ziganshin |
| author_sort | Elvira E. Ziganshina |
| collection | DOAJ |
| description | Anaerobic waste processing contributes to the development of the bioenergy sector and solves environmental problems. To date, many technologies have been developed for increasing the rate of the anaerobic digestion process and yield of methane. However, new technological advancements are required to eliminate biogas production inefficiencies. The performance of anaerobic digesters can be improved by adding conductive materials. In this study, the effects of the separate and shared use of magnetite nanoparticles and carbon nanotubes in anaerobic digesters converting high-nitrogen-containing waste, chicken manure, were investigated. The tested nanomaterials accelerated the methane production and increased the decomposition of products from the acidogenesis and acetogenesis stages. The combined use of magnetite nanoparticles and carbon nanotubes gave better results compared to using them alone or without them. Members of the bacterial classes <i>Bacteroidia</i>, <i>Clostridia</i>, and <i>Actinobacteria</i> were detected at higher levels in the anaerobic digesters, but in different proportions depending on the experiment. Representatives of the genera <i>Methanosarcina</i>, <i>Methanobacterium</i>, and <i>Methanothrix</i> were mainly detected within the methanogenic communities in the anaerobic digesters. The present study provides new data for supporting the anaerobic treatment of substrates with a high content of inhibitory compounds, such as chicken wastes. |
| first_indexed | 2024-03-11T04:43:20Z |
| format | Article |
| id | doaj.art-32a954bc60bd47f2bb77145e0900458b |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-11T04:43:20Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-32a954bc60bd47f2bb77145e0900458b2023-11-17T20:32:41ZengMDPI AGMicroorganisms2076-26072023-04-0111493810.3390/microorganisms11040938Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic DigestersElvira E. Ziganshina0Ayrat M. Ziganshin1Department of Microbiology, Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, RussiaDepartment of Microbiology, Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, 420008 Kazan, RussiaAnaerobic waste processing contributes to the development of the bioenergy sector and solves environmental problems. To date, many technologies have been developed for increasing the rate of the anaerobic digestion process and yield of methane. However, new technological advancements are required to eliminate biogas production inefficiencies. The performance of anaerobic digesters can be improved by adding conductive materials. In this study, the effects of the separate and shared use of magnetite nanoparticles and carbon nanotubes in anaerobic digesters converting high-nitrogen-containing waste, chicken manure, were investigated. The tested nanomaterials accelerated the methane production and increased the decomposition of products from the acidogenesis and acetogenesis stages. The combined use of magnetite nanoparticles and carbon nanotubes gave better results compared to using them alone or without them. Members of the bacterial classes <i>Bacteroidia</i>, <i>Clostridia</i>, and <i>Actinobacteria</i> were detected at higher levels in the anaerobic digesters, but in different proportions depending on the experiment. Representatives of the genera <i>Methanosarcina</i>, <i>Methanobacterium</i>, and <i>Methanothrix</i> were mainly detected within the methanogenic communities in the anaerobic digesters. The present study provides new data for supporting the anaerobic treatment of substrates with a high content of inhibitory compounds, such as chicken wastes.https://www.mdpi.com/2076-2607/11/4/938anaerobic digestionchicken manureconductive materialsnanomagnetitecarbon nanotubesvolatile fatty acids |
| spellingShingle | Elvira E. Ziganshina Ayrat M. Ziganshin Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters Microorganisms anaerobic digestion chicken manure conductive materials nanomagnetite carbon nanotubes volatile fatty acids |
| title | Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters |
| title_full | Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters |
| title_fullStr | Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters |
| title_full_unstemmed | Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters |
| title_short | Magnetite Nanoparticles and Carbon Nanotubes for Improving the Operation of Mesophilic Anaerobic Digesters |
| title_sort | magnetite nanoparticles and carbon nanotubes for improving the operation of mesophilic anaerobic digesters |
| topic | anaerobic digestion chicken manure conductive materials nanomagnetite carbon nanotubes volatile fatty acids |
| url | https://www.mdpi.com/2076-2607/11/4/938 |
| work_keys_str_mv | AT elviraeziganshina magnetitenanoparticlesandcarbonnanotubesforimprovingtheoperationofmesophilicanaerobicdigesters AT ayratmziganshin magnetitenanoparticlesandcarbonnanotubesforimprovingtheoperationofmesophilicanaerobicdigesters |