Nowadays, fossil
fuels; including coal, oil, and natural gas; are the world’s primary energy
sources required for industry, lighting, transportation and heating. Their
needs increased dramatically due to the vast expansion in human population and
economy. In contrast, a greenhouse gas emission is a serious problem arose from
such uses that might lead to potentially catastrophic changes in the earth’s
climate. In addition, fossil fuels are limited non-renewable resources that
will run out in few decades. These factors motivated many researchers to
develop a new renewable energy sources that could replace fossil fuels.
Biodiesel is considered as the best candidate for this purpose. Recently,
microalgae were discussed as a promising feedstock for biodiesel production.
This review presents a critical overview of engineered challenges compilations
related to microalgal biomass production. In addition, advantages and current
limitations of biodiesel production, quantitative and qualitative feasibility
of microalgal biodiesel, and its economic feasibility are discussed.
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