초록
<P>In the current study two novel psychrophilic diatoms <I>Porosira glacialis</I> and <I>Attheya longicornis</I> were tested for suitability to CO<SUB>2</SUB> mitigation coupled with production of the physiologically requisite omega– 3 fatty acids. This study is in line with the worldwide conducted research aimed at applying <I>biorefinery</I> concept to heavy polluting industries. Since the production of algal high value compounds, i.e. essential fatty acids, relies on utilization of residual CO<SUB>2</SUB> emissions coming from industry, the costs of such production maybe substantially reduced. Besides, the ecological benefits of the biorefinery concept being implemented are obvious, since CO<SUB>2</SUB> is one of the major greenhouse gases. The current research has shown that one of the tested microalgal species, the diatom <I>P</I>. <I>glacialis</I> showed good tolerance to high (20–25%) levels of CO<SUB>2</SUB> and maintained growth rates comparable to controls. The total lipid content in the CO<SUB>2</SUB> aerated culture increased from 8.91 to 10.57% in cell dry mass. Additionally, the content of docosahexaenoic acid (DHA) increased from 3.90 to 5.75%, while the concentration of eicosapentaenoic acid (EPA) decreased from 26.59 to 23.66%. In contrast, <I>A</I>. <I>longicornis</I> did not demonstrate any significant increase in total lipid content. Besides, its growth was hampered by high levels of CO<SUB>2</SUB> aeration.</P>