The growth of two types of microalgae named Chlorella vulgaris and Scenedesmus sp. under environmental conditions (IN VIVO)

BACKGROUND AND OBJECTIVESMicroalgae are a diverse group of eukaryotic photosynthetic microorganisms that can grow rapidly due to their simple structure. Chlorella vulgaris and Scenedesmus.sp are two common strains in microalgae-based industries that can grow under both autotrophic and heterotrophic conditions. The value-added compounds mainly produced from microalgal biomass are worth to investigate their growth in two simulated media of saltwater and freshwater at environmental conditions.this study attempts to develop knowledge that can provide information and clues about the growth of algae in the natural environment in simulated medium to be applicable for commercial scale.MATERIALS AND METHODSMicroalgae were obtained from Iranian Research organization for science and technology (IROST).cultured in ۶ erlen flask including ۲۵۰ cc of BG-۱۱ and BBM during ۷ days with equal cell number as mono- and mixed cultures.Erlens were inserted beside window to receive an indirect sun-light/dark condition at room temperature (averagely ۲۵۰C).natural conditions of sunlight and at room temperature were considered to evaluate their growth within cultivation.On the third and seventh days,the samples were measured to count the number of cells, biomass measurement, to evaluate the viability of growth and treatment.RESULTS AND DISCUSSIONBased on the obtained results, generally speaking, mixed cultures of C.vulgaris and Scenedesmous sp. have shown better performance rather than their mono cultivation in terms of biomass production, increasing cell numbers and OD, and TDS reduction in both BBM and BG-۱۱ medium.CONCLUSIONThe results showed that both types of microalgae in both Salt and freshwater had significant cell growth.In general, the mix of microalgae in both medium cultures(BBM and BG۱۱)had higher cell growth and biomass production

کلیدواژه ها:

BBM ، BG۱۱ ، Biomass ، Microalgae ، Salty and fresh water