Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media
The production of biogas was promoted via direct interspecies electron transfer (DIET) by employing electro-conductive carbon-nanotube hollow-fiber media (CHM) in anaerobic digestion. Experimental results showed a positive effect of CHM presence on CH<sub>4</sub> productivity with 34% hi...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/2/179 |
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| author | Seongmin Yang Seungyeob Han Yeo-Myeong Yun Seoktae Kang |
| author_facet | Seongmin Yang Seungyeob Han Yeo-Myeong Yun Seoktae Kang |
| author_sort | Seongmin Yang |
| collection | DOAJ |
| description | The production of biogas was promoted via direct interspecies electron transfer (DIET) by employing electro-conductive carbon-nanotube hollow-fiber media (CHM) in anaerobic digestion. Experimental results showed a positive effect of CHM presence on CH<sub>4</sub> productivity with 34% higher CH<sub>4</sub> production rate than that of in the presence of non-electroconductive polymeric hollow fiber media. An increased CH<sub>4</sub> production rate was due to the shift in the microbiome with more abundant <i>Pelobacter</i> (10.0%), <i>Geobacter</i> (6.9%), and <i>Methanosaeta</i> (15.7%), which play key roles in promoting CH<sub>4</sub> production via syntrophic metabolism associated with DIET. Microscopic morphology analysis, using confocal laser scanning microscopy and scanning electron microscopy, exhibited that several living cells were attached with electro-conductive <i>pili</i> on the CHM surface, thereby facilitated electron transport between microbial cells. |
| first_indexed | 2024-03-09T05:05:06Z |
| format | Article |
| id | doaj.art-7480d1a8bef245b49f0d391d0f879f90 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T05:05:06Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-7480d1a8bef245b49f0d391d0f879f902023-12-03T12:56:10ZengMDPI AGMinerals2075-163X2021-02-0111217910.3390/min11020179Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber MediaSeongmin Yang0Seungyeob Han1Yeo-Myeong Yun2Seoktae Kang3Department of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaDepartment of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaDepartment of Environmental Engineering, Chungbuk National University, Cheongju 28644, KoreaDepartment of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, KoreaThe production of biogas was promoted via direct interspecies electron transfer (DIET) by employing electro-conductive carbon-nanotube hollow-fiber media (CHM) in anaerobic digestion. Experimental results showed a positive effect of CHM presence on CH<sub>4</sub> productivity with 34% higher CH<sub>4</sub> production rate than that of in the presence of non-electroconductive polymeric hollow fiber media. An increased CH<sub>4</sub> production rate was due to the shift in the microbiome with more abundant <i>Pelobacter</i> (10.0%), <i>Geobacter</i> (6.9%), and <i>Methanosaeta</i> (15.7%), which play key roles in promoting CH<sub>4</sub> production via syntrophic metabolism associated with DIET. Microscopic morphology analysis, using confocal laser scanning microscopy and scanning electron microscopy, exhibited that several living cells were attached with electro-conductive <i>pili</i> on the CHM surface, thereby facilitated electron transport between microbial cells.https://www.mdpi.com/2075-163X/11/2/179anaerobic digestioncarbon nanotube hollow-fiber mediadirect interspecies electron transfer<i>Pelobacter</i><i>Methanosaeta</i> |
| spellingShingle | Seongmin Yang Seungyeob Han Yeo-Myeong Yun Seoktae Kang Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media Minerals anaerobic digestion carbon nanotube hollow-fiber media direct interspecies electron transfer <i>Pelobacter</i> <i>Methanosaeta</i> |
| title | Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media |
| title_full | Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media |
| title_fullStr | Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media |
| title_full_unstemmed | Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media |
| title_short | Stimulation of Biomethane Productivity in Anaerobic Digestion Using Electro-Conductive Carbon-Nanotube Hollow-Fiber Media |
| title_sort | stimulation of biomethane productivity in anaerobic digestion using electro conductive carbon nanotube hollow fiber media |
| topic | anaerobic digestion carbon nanotube hollow-fiber media direct interspecies electron transfer <i>Pelobacter</i> <i>Methanosaeta</i> |
| url | https://www.mdpi.com/2075-163X/11/2/179 |
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