Abstract
Rise in human population and gradual decline in fossil fuels are increasing the demand for fuels and causing an upsurge in fuel prices and global warming. Concomitantly, consumers have raised their health awareness by taking various supplements, e.g. omega-3 fatty acids, thus calling for advanced nutraceuticals. Both issues are addressed by recent research on microalgae, which can be easily cultivated to produce lipidic biofuels and active drugs. Here, we reviewed the types and biosynthesis of microalgal lipids. We discuss genetic engineering and manipulation of cultivation conditions for enhancing lipid production. We present techniques for lipid extraction, with focus on green techniques. We also discuss the technical and economic challenges in manufacturing microalgae-based biofuels and other bioproducts at the industrial scale. Last, the market potentials and further research directions for future commercialization of microalgae lipids are discussed.
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