How Microalgae Is Considered As The Third Generation Biomass

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Abstract Microalgae is considered as the third generation biomass. Chlorophyta is the most common type of microalgae and has a huge potential used in many fields. Key word: green algae, food supplement, CO2 fixiation, wastewater treatment, hydrogen production Introduction In the early 1950’s, the world’s population increased dramatically due to the end of World War Ⅱ. The predictions of an insufficient protein supply resulted in a search for new alternative and unconventional sources. Algal biomass was considered as a good candidate for this purpose. Later, the use of microalgae for generating renewable energy sources provoked heightened interest. From 1980 to 1996, the US Department of Energy supported the Aquatic Species Program (ASP) due to the oil crisis in 1970’s. The aim of the program was to produce oil from microalgae. Algae are ubiquitous. Chlorophyta is one of major divisions of microalgae, and it is the most common type. Chlorophyta is photosynthetic eukaryote. The cells of most green algae have a cellulose case, a vacuole with a cell juice, differentiated mucleus and chloroplast. They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b, which absorb red light in shallow waters. Most of green algae live in freshwater. Now the microalgae is considered as the third generation biomass and can be used in many fields such as food supplement, wastewater treatment, hydrogen production and biofuels. Researches focus on the green

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