Bioelectrochemical methane (CH4) production in anaerobic digestion at different supplemental voltages
| Autor: | Booki Min, Sanath Kondaveeti, Kwang-Soon Choi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Electrolysis
Environmental Engineering Renewable Energy Sustainability and the Environment Analytical chemistry Bioengineering 02 engineering and technology General Medicine 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Methane Cathode law.invention Anaerobic digestion chemistry.chemical_compound chemistry law Microbial electrolysis cell Bioreactor Fermentation Cyclic voltammetry 0210 nano-technology Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Bioresource Technology. 245:826-832 |
| ISSN: | 0960-8524 |
| Popis: | Microbial electrolysis cells (MECs) at various cell voltages (0.5, 0.7 1.0 and 1.5V) were operated in anaerobic fermentation. During the start-up period, the cathode potential decreased from -0.63 to -1.01V, and CH4 generation increased from 168 to 199ml. At an applied voltage of 1.0V, the highest methane yields of 408.3ml CH4/g COD glucose was obtained, which was 30.3% higher than in the control tests (313.4ml CH4/g COD glucose). The average current of 5.1mA was generated at 1.0V at which the maximum methane yield was obtained. The other average currents were 1.42, 3.02, 0.53mA at 0.5, 0.7, and 1.5V, respectively. Cyclic voltammetry and EIS analysis revealed that enhanced reduction currents were present at all cell voltages with biocatalyzed cathode electrodes (no reduction without biofilm), and the highest value was obtained with 1V external voltage. |
| Databáze: | OpenAIRE |
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