A lab scale bioreactor with the submerged polyester mesh of pore size 100 μm, was used for biohydrogen production under mesophilic condition (35 °C). The reactor was continuously fed with glucose (15 g/L)for 90 days with a hydraulic retention time (HRT), ranging from 12 to 1.5 h. Peak hydrogen yield (HY)was achieved at 3 h HRT as 3.22 ± 0.22 mol H2/mol glucose added and the hydrogen production rate was achieved at 2 h HRT as 54.07 ± 3.69 L H2/L-d, respectively. When HRT was reduced to 1.5 h, the hydrogen yield decreased to 1.04 ± 0.44 mol H2/mol glucose added. Washout of the hydrogen producing population and metabolic flux shift to non-hydrogen producing at 1.5 h HRT might have attributed to the lower performance of the bioreactor.
Bibliographical noteFunding Information:
The authors acknowledge the National Research Foundation of Korea (NRF) grant funded by the Korea Government (Ministry of science and ICT, No. 2017R1A2A2A07000900 ). This research was also supported by the Yonsei University Research Fund of 2018 ( 2018-22-0047 ).
© 2019 Elsevier Ltd
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal