Biodiesel is a renewable, sustainable and environmentally friendly fuel that can be produced from a variety of sources, including marine microalgae and freshwater microalgae. Microalgae are photosynthetic organisms that can accumulate high amounts of lipids, which can be extracted and converted into biodiesel through a process called transesterification. Marine microalgae and freshwater microalgae have different characteristics that affect their potential for biodiesel production. Marine microalgae are typically more tolerant to high salinity and temperature, which makes them suitable for cultivation in seawater and in warm climates. Freshwater microalgae, on the other hand, can be cultivated in freshwater and have lower nutrient requirements, which makes them more suitable for use in regions with limited water resources. The production of biodiesel from microalgae involves several steps, including cultivation, harvesting, lipid extraction, and transesterification. The cultivation of m
