Economically efficient biomass production is crucial to lift the microalgal circular bioeconomy requiring low production cost with higher biomass and value-added products. In this study, Micractinium sp. YACCYB505 was cultured at different illuminations (1600, 2400, 3200 lux) and CO₂ conditions (up to 10%) to evaluate biomass productivity and accumulation of macromolecules (lipid, carbohydrate and protein). The product optimization study was conducted to analyze individual variables of environmental factors by using a Box-Behnken design. Highlight intensity (3200 lux) and 5% CO₂ aeration maximized biomass productivity on 11th day of microalgal harvest. Microalgal lipid accumulation indicated positive impact on increased CO₂ aeration and light intensity treatment. Similarly, a considerable amount of protein content (9%) was increased at higher CO₂ aeration but raised light intensity had a negative impact on protein biosynthesis. Significant carbohydrate content reduction was observed with increased light intensity and CO₂ aeration. The overall results proved that increased CO₂ concentration (10%) and light intensity (3200 lux) enhanced lipid accumulation (32%) and biomass productivity in Micractinium sp., which provides potential to achieve a sustainable, cost-effective biomass and value-added products.

经济高效的生物质生产对于提升微藻循环生物经济至关重要，该经济需要低生产成本和更高的生物质和增值产品。在这项研究中，Micractinium sp。YACCYB505 在不同光照（1600、2400、3200 勒克斯）和 CO ₂条件（最高 10%）下培养，以评估生物量生产力和大分子（脂质、碳水化合物和蛋白质）的积累。通过使用 Box-Behnken 设计，进行产品优化研究以分析环境因素的各个变量。突出强度（3200 勒克斯）和 5% CO ₂曝气在微藻收获的第 11 天最大限度地提高了生物量生产力。_{微藻脂质积累表明对增加的 CO 2}有积极影响曝气和光照强度处理。_{同样，在较高的 CO 2}曝气量下，相当数量的蛋白质含量 (9%) 会增加，但光强度的提高对蛋白质的生物合成产生负面影响。_{随着光照强度和CO 2}曝气的增加，观察到碳水化合物含量显着降低。总体结果证明，增加 CO ₂浓度 (10%) 和光照强度 (3200 lux) 可增强Miractinium sp. 中的脂质积累 (32%) 和生物质生产力，这为实现可持续、具有成本效益的生物质和价值提供了潜力。添加的产品。