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EBI study concludes potential contribution of microalgae biofuels in US will be modest due to resource constraints and cost

2 November 2010

Micrographs of commercially cultivated algae species. Top left, Spirulina (Arthrospira platensis). Top right, Dunaliella salina. Bottom left, Chlorella vulgaris. Bottom right, Haematococcus pluvialis. Spirulina are cyanobacteria and the other three are green algae (Chlorophyceae). Source: EBI. Click to enlarge.

Even with necessary advances in biology and process efficiencies, the resource potential of microalgae biofuels will always be modest mainly due to the lack of sites having all the needed resources, in particular available CO₂, according to a new detailed assessment from the Energy Biosciences Institute (EBI) in Berkeley. However, the report concludes, over the long-run, algae oil could make a vital, even if modest, contribution to a US biofuels industry.
The study, “A Realistic Technology and Engineering Assessment of Algae Biofuel Production” is based on a detailed techno-economic analysis of five microalgae biofuel production scenarios based on technologies that currently exist or are expected to become available in the near-term, including raceway ponds for microalgae cultivation; bioflocculation for algae harvesting; and hexane for extraction of algae oil.