A feasibility study on the bioconversion of CO2 and H2 to biomethane by gas sparging through polymeric membranes

Bioresource Technology
I DíazF Fdz-Polanco

Abstract

In this study, the potential of a pilot hollow-fiber membrane bioreactor for the conversion of H2 and CO2 to CH4 was evaluated. The system transformed 95% of H2 and CO2 fed at a maximum loading rate of 40.2 [Formula: see text] and produced 0.22m(3) of CH4 per m(3) of H2 fed at thermophilic conditions. H2 mass transfer to the liquid phase was identified as the limiting step for the conversion, and kLa values of 430h(-1) were reached in the bioreactor by sparging gas through the membrane module. A simulation showed that the bioreactor could upgrade biogas at a rate of 25m(3)/mR(3)d, increasing the CH4 concentration from 60 to 95%v. This proof-of-concept study verified that gas sparging through a membrane module can efficiently transfer H2 from gas to liquid phase and that the conversion of H2 and CO2 to biomethane is feasible on a pilot scale at noteworthy load rates.

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Citations

Sep 2, 2016·Frontiers in Microbiology·Emilio Garcia-RobledoNiels P Revsbech
Jul 1, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Katie Baransi-KarkabyIsam Sabbah
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Dec 5, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Noémie FigeacRenaud Escudié
Sep 13, 2020·Trends in Biotechnology·Shanfei FuYifeng Zhang
Dec 8, 2020·Bioresource Technology·Giorgio PratofioritoAndrea Hille-Reichel
Sep 19, 2020·Bioresource Technology·Brian Dahl JønsonJin Mi Triolo
Apr 13, 2019·Bioresource Technology·Aline LebranchuStéphane Delaunay
Nov 18, 2018·International Journal of Biological Macromolecules·R Prathiviraj, P Chellapandi
May 26, 2021·Bioresource Technology·Maximilian MiehleAndrea Hille-Reichel
Aug 17, 2021·Water Research·Mohammad Shakil AhmmedDamien J Batstone
Aug 25, 2021·The Science of the Total Environment·Jing ZhaoRenjie Dong

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