한빛사논문
- 조회282
연세대학교
Jisu Yang a, Young-Bo Sim a, Saint Moon Kim a, Hwan-Hong Joo a, Ju-Hyeong Jung b, Sang-Hyoun Kim a
aDepartment of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea
bDepartment of Environmental Engineering, Kunsan National University, Gunsan 54150, Republic of Korea
Corresponding author : Sang-Hyoun Kim
Abstract
The present study investigated the effect of a conductive biofilm supporter on continuous production of biohydrogen in a dynamic membrane bioreactor (DMBR). Two lab-scale DMBRs were operated: one with a nonconductive polyester mesh (DMBR I) and the other with a conductive stainless-steel mesh (DMBR II). The highest average hydrogen productivity and the yield were 16.8% greater in DMBR II than in DMBR I, with values of 51.64 ± 0.66 L/L-d and 2.01 ± 0.03 mol H2/mol hexoseconsumed, respectively. The improved hydrogen production was concurrent with a higher NADH/NAD+ ratio and a lower ORP (Oxidation-reduction potential). Metabolic flux analysis implied that the conductive supporter promoted H2-producing acetogenesis and repressed competitive NADH-consuming pathways, such as homoacetogenesis and lactate production. Microbial community analysis revealed that electroactive Clostridium sp. were the dominant H2 producers in DMBR II. Conclusively, conductive meshes may be useful as biofilm supporters of dynamic membranes during H2 production for selectively enhancing H2-producing pathways.
논문정보
- Research article
- 2023년 06월 (BRIC 등록일 2023-06-02)
- 국내 연구진
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