Design of new strategy for green algal photo-hydrogen production: Spectral-selective photosystem I activation and photosystem II deactivation

Takanori Hoshino, Daniel J. Johnson, Joel L. Cuello

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

A new strategy in photosynthetic hydrogen (photo-H2) production from green algae was developed based on theory and successfully demonstrated. The new strategy applied a spectral-selective photosystem I (PSI) activating/photosystem II (PSII) deactivating radiation (or PSI light) that would drive a steady flow of electrons in the electron transport chain for delivery to hydrogenase for photo-H2 production, but would reduce oxygen production through water photolysis below the respiratory oxygen consumption so that an anoxic condition would be maintained as required by hydrogenase. Implementing the strategy by using a PSI light (692nm peak, 680-700nm) on Chlamydomonas reinhardtii cells resulted in relatively sustained photo-H2 production (total of 0.108mLH2mg-1Chl, exceeding 0.066mLH2mg-1Chl under white light). The strategy also proved successful and convenient in allowing cells to alternately switch between photo-H2 production and a recovery period by simply turning on or off the PSI light.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalBioresource Technology
Volume120
DOIs
StatePublished - Sep 1 2012

Keywords

  • Algae
  • Chlamydomonas reinhardtii
  • Hydrogen
  • Light emitting diodes (LEDs)
  • Photosystem

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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