| Title | Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column |
|---|---|
| ID_Doc | 7137 |
| Authors | Figueras, J; Benbelkacem, H; Dumas, C; Buffiere, P |
| Title | Biomethanation of syngas by enriched mixed anaerobic consortium in pressurized agitated column |
| Year | 2021 |
| Published | |
| Abstract | In a circular economy approach, heterogeneous wastes can be upgraded to energy in the form of syngas via pyrogasification, and then to methane via biomethanation. Working at high pressure is a promising approach to intensify the process and to reduce gas-liquid transfer limitations. However, raising the pressure could lead to reaching the CO inhibition threshold of the microorganisms involved in syngas-biomethanation. To investigate the impact on pressure on the process, a 10L continuous stirred tank reactor working at 4 bars and 55 degrees C was implemented. Syngas (40% CO, 40% H2, 20% CO2) biomethanation was performed successfully and methane productivity as high as 6.8 mmolCH4/Lreactor/h with almost full conversion of CO (97%) and H2 (98%) was achieved. CO inhibition was investigated and carboxydotrophs appeared less resistant to high CO exposition than methanogens. |
| http://manuscript.elsevier.com/S0960852421008890/pdf/S0960852421008890.pdf |
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