Global warming, as a result of atmospheric CO₂ increase, is regarded as an important universal concern. Microalgae are considered as appropriate microorganisms for CO₂ assimilation. Here we aimed to investigate carbon biofixation ability of two indigenous isolates of Dunaliella spp. (ABRIINW-CH2 and ABRIINW-SH33) under elevated CO₂ concentrations of 10, 20, and 30% (v/v) as well as their lipid content, productivity, and fatty acid profile under adjusted pH conditions. The maximum biomass production and CO₂ biofixation rates were obtained under 10% CO₂. High CO₂ concentrations were favorable for the accumulation of lipids, lipid productivity, and polyunsaturated fatty acids formation. The highest lipid content and lipid productivity was obtained at 10% CO₂. The highest fraction of the fatty acids (FA) profile was allocated to omega-3 FAs at 20% CO₂. Accordingly, these isolates were able to tolerate extremely high CO₂ concentrations and present even enhanced growth as well as formation of valuable products.

由于大气中CO _2的增加，全球变暖被认为是普遍关注的重要问题。微藻被认为是适合CO ₂同化的微生物。在这里，我们旨在调查杜氏藻的两个本地分离株的碳生物固定能力。（ABRIINW-CH2和ABRIINW-SH33）在升高的CO ₂浓度为10％，20％和30％（v / v）的情况下，以及在调节的pH条件下其脂质含量，生产率和脂肪酸谱。在10％CO ₂下获得最大的生物量生产和CO ₂生物固定率。高CO ₂浓度有利于脂质的积累，脂质生产力和多不饱和脂肪酸的形成。在10％CO ₂下获得最高的脂质含量和脂质生产率。脂肪酸（FA）谱中的最高部分分配给了20％CO _2的omega-3 FA 。因此，这些分离物能够耐受极高的CO ₂浓度，甚至可以促进生长并形成有价值的产物。