Application of high frequency ultrasound in different irradiation systems for photosynthesis pigment extraction from Chlorella microalgae

摘要: Microalgae are considered the biological drug factories of future. To benefit from these microfactories, intracellular metabolite algae should be extracted. One most economically competitive methods is ultrasound technique. This study was concerned with ultrasound-assisted extractions useful substances microalgae by comparing direct and indirect irradiation respect to extraction rate yields. It likely that irradiations had different powers. The systems were exposed wave (1.7 MHz) for 240min. For each system, changes optical density, concentration biovolume Chlorella estimated. In addition, extracted chlorophylls (a, b a+b), carotenoid lipid measured. factors studied after 30, 60, 120, 180 240 min exposure irradiation. Both produced cavitation in cell membrane, they reduced cells. amount lipids greater as compared one, it caused more disruption. However, less effective because transmitted power ultrasound, resulting degradation carotenoid. results analysis presented this research showed selection best method an important step, depends on biomaterials