Category Archives: Biotechnological Applications of Microalgae

NATIVE STRAINS, CONSORTIA OF SPECIES, AND EXTREMOPHILES

It is easy to find algae, but finding algae suitable for biotechnology is difficult. Currently, insufficient attention is paid to the selection of algal strains that could be cultivated inexpensively by growing them in wastewater and under ambient condi­tions of light and temperature. It is necessary for entrepreneurs of microalgal bio­technology to invest in selecting algal strains and optimizing their […]

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Temperature

Along with light intensity, temperature is one of the most difficult parameters to optimize in large-scale outdoor culture systems. Fluctuations in temperature, both daily and seasonally, can lead to significant decreases in productivity. The optimal growth temperature for microalgae is species specific, but often in the region of 20°C to 30°C (Chisti, 2008). Many algal species can tolerate temperatures of […]

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BIOFUEL/BIODIESEL FROM MICROALGAL OIL AS A POTENTIAL ALTERNATIVE TO OTHER FUELS

As microalgae possess a simple cellular structure, their capability to efficiently convert solar energy into chemical energy is high. The production of oil per unit area of land from selected microalgae is around 30 times greater than that of ter­restrial plants. The scenario thus looks promising for the production of biodiesel from the microalgal oil. There are various steps involved—from […]

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COMPARISON OF REACTOR TYPES

The microalgal reactors described above differ in features such as surface-to-volume ratio, freedom to adjust orientation and inclination, efficiency of mixing and gas supply (related to hydrodynamics and mass transfer), ease of maintenance, tempera­ture regulation, and construction materials. Table 5.4 presents a comparison of these design features in six major types of reactor. No reactor design is able to effectively […]

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ECONOMIC CONSIDERATIONS OF MICROALGAL PRODUCTION

9.4.1 Cost of Algal Biomass and Algal Oil Currently, commercial processes for the production of microalgae only exist for the production of specialty products such as health supplements, carotenoids, and specific aquaculture feeds. Furthermore, most of the algal species used in these processes are extremophilic algae. Data on the cost of large-scale algal processes are largely based on pre-implementation costing […]

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PHYCOREMEDIATION

The term phycoremediation was coined by John (2000) to refer to the remediation of water carried out by algae. Microalgae have high efficacy in wastewater treatment and can offer possible solutions for environmental problems (Lau et al., 1994; Craggs et al., 1997; Korner and Vermaat, 1998; Harun et al., 2010). Microalgae are eukary­otic, autotrophic microorganisms that can adapt to almost […]

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