Selective Removal of Water Generated during Hydrogenotrophic Methanation from Culture Medium Using Membrane Distillation
| Autor: | Yonghyun Shin, Bomin Kim, Sangho Lee, Byoung-In Sang, Byoung Seung Jeon, Moon-Gi Hong, Okkyoung Choi, Young Gook Kim, MinJeong Kim, Ji Sun Joo, Youngwook Go |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Control and Optimization
Hydrogen 020209 energy Energy Engineering and Power Technology chemistry.chemical_element membrane distillation 02 engineering and technology 010501 environmental sciences Membrane distillation membrane flux 01 natural sciences lcsh:Technology Methane chemistry.chemical_compound Methanation 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Engineering (miscellaneous) 0105 earth and related environmental sciences biology Renewable Energy Sustainability and the Environment lcsh:T biology.organism_classification Methanogen Dilution chemistry Chemical engineering Carbon dioxide hydrogenotrophic methanogen methanation power to gas Energy (miscellaneous) Bubble column reactor |
| Zdroj: | Energies, Vol 12, Iss 21, p 4130 (2019) Energies Volume 12 Issue 21 Pages: 4130 |
| ISSN: | 1996-1073 |
| Popis: | Methane production was carried out in two different types of reactors using a thermophilic and hydrogenotrophic methanogen, Methanothermobacter sp. KEPCO-1, which converts hydrogen and carbon dioxide into methane at 60 °C. The two reactors used for methane production were stirred-tank reactor (ST) and a bubble column reactor (BC), which were selected because they can provide a good comparison between the medium agitation type and gas−liquid mass transfer. The specific growth rate of KEPCO-1 in the ST and BC was 0.03 h−1 and 0.07 h−1, respectively. The methane conversion rate increased to 77.8 L/L/d in the ST and 19.8 L/L/d in the BC. To prevent the dilution of nutrients in the medium by the water generated during the hydrogenotrophic methanation reaction, a membrane distillation (MD) process was applied to selectively remove water from the culture medium. The MD process selectively removed only water from the medium. Fouling by KEPCO-1 had a negligible effect on flux and showed a high removal performance flux of 16.3 ± 3.1 L/m2/h. By operating the MD process in conjunction with the hydrogenotrophic methanation process, it is possible to prevent the dilution of the nutrients in the medium by the water generated during the methanation process, thereby maintaining stable microbial growth and methanation activity. |
| Databáze: | OpenAIRE |
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