Applied Microbiology and Biotechnology

, Volume 76, Issue 5, pp 969–975

Ultrahigh bioproductivity from algae

Mini-Review

DOI: 10.1007/s00253-007-1102-x

Cite this article as:
Gordon, J.M. & Polle, J.E.W. Appl Microbiol Biotechnol (2007) 76: 969. doi:10.1007/s00253-007-1102-x

Abstract

The potential for dramatic increases in bioproductivity in algal photobioreactors relative to current biomass approaches, e.g., for converting sunlight into biofuels, by an unorthodox integration of photonics and biotechnologies is described. The key to greater biomass yields—projected as high as 100 g dry weight m−2 h−1—is a pronounced heightening of algal flux tolerance, achieved by tailoring the photonic temporal, spectral and intensity characteristics with pulsed light-emitting diodes. Such tailored photonic input is applied in concert with thin-channel ultradense culture photobioreactors with flow patterns that produce rapid light/dark algae exposure cycles. The artificial-light scheme is globally feasible only with electricity generated from renewables. Recent advances in ultra-efficient concentrator photovoltaics, as well as high-performance light-emitting diodes, create a practical reality for converting sunlight into pulsed red light and delivering it to indoor photobioreactors, with characteristic pulse times and intensities optimally suited to the rate-limiting dark reactions of photosynthesis. Cellular engineering built upon recent progress in modifying algal chlorophyll antenna size, in combination with metabolic engineering, could further enhance bioproductivity. The proposed strategy requires no major advances for implementation and adopts existing technologies.

Keywords

Photosynthesis Algae Photonics Solar energy Light-emitting diodes Biofuels 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevSede Boqer CampusIsrael
  2. 2.The Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical EngineeringBen-Gurion University of the NegevBeershevaIsrael
  3. 3.Department of BiologyBrooklyn College of the City University of New YorkBrooklynUSA

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