title: Effect of internal pressure and gas/liquid interface area on the CO mass transfer coefficient using hollow fibre membranes as a high mass transfer gas diffusing system for microbial syngas fermentation.
abstract: This study proposed a submerged hollow fibre membrane bioreactor (HFMBR) system capable of achieving high carbon monoxide (CO) mass transfer for applications in microbial synthesis gas conversion systems. Hydrophobic polyvinylidene fluoride (PVDF) membrane fibres were used to fabricate a membrane module, which was used for pressurising CO in water phase. Pressure through the hollow fibre lumen (P) and membrane surface area per unit working volume of the liquid (A(S)/V(L)) were used as controllable parameters to determine gas-liquid volumetric mass transfer coefficient (k(L)a) values. We found a k(L)a of 135.72 h(-1) when P was 93.76 kPa and AS/VL was fixed at 27.5m(-1). A higher k(L)a of 155.16 h(-1) was achieved by increasing AS/VL to 62.5m(-1) at a lower P of 37.23 kPa. Practicality of HFMBR to support microbial growth and organic product formation was assessed by CO/CO2 fermentation using Eubacterium limosum KIST612.
authors.affiliation: School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Yasin
authors.affiliation: School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea.
authors.forename: Shinyoung
authors.initials: S
authors.lastname: Park
authors.affiliation: School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea.
authors.forename: Yeseul
authors.initials: Y
authors.lastname: Jeong
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Gyeonggi-do 446-701, Republic of Korea.
authors.forename: Eun Yeol
authors.initials: EY
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Jinwon
authors.initials: J
authors.lastname: Lee
authors.affiliation: School of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea. Electronic address: ischang@gist.ac.kr.
authors.forename: In Seop
authors.initials: IS
authors.lastname: Chang
mesh_terms: D056804:Biofuels / Q000382:microbiology*; D019149:Bioreactors / Q000382:microbiology*; D002245:Carbon Dioxide / Q000378:metabolism; D002248:Carbon Monoxide / Q000737:chemistry*; D004058:Diffusion; D005051:Eubacterium / Q000254:growth & development / Q000378:metabolism*; D005285:Fermentation; D008567:Membranes, Artificial; D011312:Pressure
chemical_list: D056804:Biofuels; D008567:Membranes, Artificial; D002245:Carbon Dioxide; D002248:Carbon Monoxide
keywords: Eubacterium limosum KIST612; Hollow fibre membrane bioreactor; Mass transfer; Syngas fermentation