Study on biological characteristics and biomass production of the green microalgae (Nannochloris atomus) isolated from Vietnam for the extraction of bioactive compounds

Microalgae are known to be a nutrient-rich feed source for many aquatic animals. It is also an important raw material exploit high biological activity substances humans. This the first study on characteristics and algae biomass production from green microalgae Nannochloris atomus being carried out in Vietnam. In this study, scientific name of strain N. NT12 based morphological 18S rRNA gene sequence (with accession number MW007766 GenBank) was identified. At best conditions growth (i.e. Walne medium, 3 x 106 cells/mL initial cell density, 25 -30oC temperature, 60 - 100 µmol/m2s light intensity, pH 7, 30‰ salinity), highest density 30 obtained after days culture. The successfully cultured pilot scale plastic bottle 10 L closed photobioreactors 20 – 50 resulting productivity 209 mg/L/day rich polyunsaturated fatty acids such as oleic acid (C18:1n-9), linoleic (C18:2n-6) α-linolenic (C18:3n-3) qualified purpose extraction value bioactive compounds.