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The Growth Factors Involved in Microalgae Cultivation for Biofuel Production: A Review

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Document pages: 32 pages

Abstract: The growing demand for energy and the negativeenvironmental impacts of fossil fuel use are triggering global searches for arenewable and eco-friendly alternative biofuel. Microalgae are considered asone of the most promising feedstocks for biofuel production, due to manyadvantages including cultivation innon-arable land and being able to grow in wastewater or seawater. That is why;microalgae-based biofuels are regarded as one of the best candidates to replacefossil fuels. There are two main types of microalgae cultivation systems: OpenRaceway Ponds and Closed Photobioreactos (PBRs). Due to some limitations in Open Raceways, PBRs have become the mostfavorable choice for biofuel producers, even though it is costly. Tomake the process viable, the growth of microalgae for biofuel production shouldbe cost-effective. One way to achieve this goal is to optimize theenvironmental factors that influence their growth during the cultivation stageto increase the accumulation of bio-compounds of fuel. Algal growth reliesmostly on nutrients, CO2 concentration, pH and salinity, lightintensity and quality, temperature and finally mixing, which directly affects all other factors. Thus, beforedesigning PBR, a thorough study on thesegrowth parameters is needed. In the present study, wereviewed and evaluated these growth influencing factors in an extensive way tooptimize biofuel production.

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