Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal
This study demonstrated the enhancement of biogenic coal conversion to methane in a bioelectrochemical anaerobic reactor with polarized electrodes. The electrode with 1.0 V polarization increased the methane yield of coal to 52.5 mL/g lignite, which is the highest value reported to the best of our k...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-09-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/11/10/2577 |
| _version_ | 1798026975193858048 |
|---|---|
| author | Dong-Mei Piao Young-Chae Song Dong-Hoon Kim |
| author_facet | Dong-Mei Piao Young-Chae Song Dong-Hoon Kim |
| author_sort | Dong-Mei Piao |
| collection | DOAJ |
| description | This study demonstrated the enhancement of biogenic coal conversion to methane in a bioelectrochemical anaerobic reactor with polarized electrodes. The electrode with 1.0 V polarization increased the methane yield of coal to 52.5 mL/g lignite, which is the highest value reported to the best of our knowledge. The electrode with 2.0 V polarization shortened the adaptation time for methane production from coal, although the methane yield was slightly less than that of the 1.0 V electrode. After the methane production from coal in the bioelectrochemical reactor, the hydrolysis product, soluble organic residue, was still above 3600 mg chemical oxygen demand (COD)/L. The hydrolysis product has a substrate inhibition effect and inhibited further conversion of coal to methane. The dilution of the hydrolysis product mitigates the substrate inhibition to methane production, and a 5.7-fold dilution inhibited the methane conversion rate by 50%. An additional methane yield of 55.3 mL/g lignite was obtained when the hydrolysis product was diluted 10-fold in the anaerobic toxicity test. The biogenic conversion of coal to methane was significantly improved by the polarization of the electrode in the bioelectrochemical anaerobic reactor, and the dilution of the hydrolysis product further improved the methane yield. |
| first_indexed | 2024-04-11T18:44:08Z |
| format | Article |
| id | doaj.art-5ab2d9b9dd494cfba7513cc2c7168fbc |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T18:44:08Z |
| publishDate | 2018-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5ab2d9b9dd494cfba7513cc2c7168fbc2022-12-22T04:08:53ZengMDPI AGEnergies1996-10732018-09-011110257710.3390/en11102577en11102577Bioelectrochemical Enhancement of Biogenic Methane Conversion of CoalDong-Mei Piao0Young-Chae Song1Dong-Hoon Kim2Department of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-Gu, Busan 49112, KoreaDepartment of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-Gu, Busan 49112, KoreaDepartment of Civil Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon 22212, KoreaThis study demonstrated the enhancement of biogenic coal conversion to methane in a bioelectrochemical anaerobic reactor with polarized electrodes. The electrode with 1.0 V polarization increased the methane yield of coal to 52.5 mL/g lignite, which is the highest value reported to the best of our knowledge. The electrode with 2.0 V polarization shortened the adaptation time for methane production from coal, although the methane yield was slightly less than that of the 1.0 V electrode. After the methane production from coal in the bioelectrochemical reactor, the hydrolysis product, soluble organic residue, was still above 3600 mg chemical oxygen demand (COD)/L. The hydrolysis product has a substrate inhibition effect and inhibited further conversion of coal to methane. The dilution of the hydrolysis product mitigates the substrate inhibition to methane production, and a 5.7-fold dilution inhibited the methane conversion rate by 50%. An additional methane yield of 55.3 mL/g lignite was obtained when the hydrolysis product was diluted 10-fold in the anaerobic toxicity test. The biogenic conversion of coal to methane was significantly improved by the polarization of the electrode in the bioelectrochemical anaerobic reactor, and the dilution of the hydrolysis product further improved the methane yield.http://www.mdpi.com/1996-1073/11/10/2577coallignitemethanebiogenic conversionbioelectrochemical reactorinhibition |
| spellingShingle | Dong-Mei Piao Young-Chae Song Dong-Hoon Kim Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal Energies coal lignite methane biogenic conversion bioelectrochemical reactor inhibition |
| title | Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal |
| title_full | Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal |
| title_fullStr | Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal |
| title_full_unstemmed | Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal |
| title_short | Bioelectrochemical Enhancement of Biogenic Methane Conversion of Coal |
| title_sort | bioelectrochemical enhancement of biogenic methane conversion of coal |
| topic | coal lignite methane biogenic conversion bioelectrochemical reactor inhibition |
| url | http://www.mdpi.com/1996-1073/11/10/2577 |
| work_keys_str_mv | AT dongmeipiao bioelectrochemicalenhancementofbiogenicmethaneconversionofcoal AT youngchaesong bioelectrochemicalenhancementofbiogenicmethaneconversionofcoal AT donghoonkim bioelectrochemicalenhancementofbiogenicmethaneconversionofcoal |