Why algae fuels not commercialized yet? 10I read a research abstract recently published - Proponents of microalgae biofuel technologies often claim that the world demand of liquid fuels, about 5 trillion liters per year, could be supplied by microalgae cultivated on only a few tens of millions of hectares. This perspective reviews this subject and points out that such projections are greatly exaggerated, because
(1) The productivities achieved in large-scale commercial microalgae production systems, operated year-round, do not surpass those of irrigated tropical crops.
(2) Cultivating, harvesting and processing microalgae solely for the production of biofuels is simply too expensive using current or prospective technology; and
3) Currently available (limited) data suggest that the energy balance of algal biofuels is very poor. Thus, microalgal biofuels are no panacea for depleting oil or global warming, and are unlikely to save the internal combustion machine.
On reading this abstract, It appears that algae fuels cannot be commercialized before ten years from now. But I believe that the current research trends could address these problems to some extent.
For the first point on yield, algae are single celled, and can multiply very fast. The rate of biomass produced is eventually higher. Unlike land crops which are harvested once in a period of 3 months or six months, algae can double its biomass every hour making it harvestable daily.
It is indeed true that the cost of cultivation and harvesting is not cost competitive. But the current research on process integration (integrating various processes such as harvesting and extraction of oil into a single step process) and research on production of high value chemicals as by products can overcome this problem to some extent.
Energy balance is still not clear due to various processes employed in each step of the product conversion. May be I should read up a bit more on this aspect of algae fuels. Login to Post a Comment