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EUBCE 2024 - Jack LEGRAND - Continuous Biohydrogen Photoproduction by Chlamydomonas reinhardtii Using a Novel Two-Stage Process Strategy

Continuous Biohydrogen Photoproduction by Chlamydomonas reinhardtii Using a Novel Two-Stage Process Strategy

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Synthetic fuels from biomass and hydrogen

Continuous Biohydrogen Photoproduction by Chlamydomonas reinhardtii Using a Novel Two-Stage Process Strategy

Short Introductive summary

Hydrogen is considered to be the energy carrier of the future, since its combustion does not produce greenhouse gases. However, its production uses fossil fuels, therefore other production routes need to be explored. In this work, we are interested in the continuous biological photoproduction of hydrogen using an innovative carbon-negative process. To achieve this, we use a two-stage culture system to spatially separate the two key stages in hydrogen production by microalgae, namely starch accumulation with reduced photosynthetic activity, and the anoxic conditions required for biosynthesis of the hydrogenase enzyme. The two-stage process enabled hydrogen to be produced continuously for over 70 hours. These results demonstrate the feasibility of intensified biological hydrogen production using a novel culture strategy.

Presenter

Moderator portrait

Jack LEGRAND

University of Nantes, GEPEA Dpt., FRANCE

Presenter's biography

Jack LEGRAND is Emeritus Professor of Chemical Engineering at the University of Nantes. He is a specialist in transfer and mixing phenomena in processes and (photo)bioprocesses, in particular the design and modelling of photobioreactors for the valorisation of microalgae.

Biographies and Short introductive summaries are supplied directly by presenters and are published here unedited


Co-authors:

F. R. Ferrel Ballestas, GEPEA Laboratory, Saint nazaire, FRANCE
J. Legrand, GEGPEA Laboratory, Saint nazaire, FRANCE
M. Titica, GEPEA Laboratory, Saint nazaire, FRANCE
G. Cogne, GEPEA Laboratory, Saint nazaire, FRANCE

Session reference: 5BV.6.5