The flue gas CO₂ from coal chemical plants can be purified and then absorbed by microalgae to produce high valued products and achieve CO₂ emission reduction. The dissolution of CO₂ from coal chemical flue gas was strengthened using microporous diaphragm aerators (MDA) to promote the HCO₃^– concentration for improving photosynthetic characteristics of Arthrospira cells in 660 m² raceway ponds with 2.5–10 vol % CO₂ gas. An increase in the quantum yield of the photosynthetic electron transfer of Arthrospira cells promoted biomass growth by 15.5% in the MDA-equipped raceway pond. The specific energy fluxes of light absorption (ABS/RC) and electron transport (ET₀/RC) in Arthrospira cells at 23 h first increased to peaks of 3113 and 757, respectively, when the CO₂ concentration increased from 0.04% (air) to 7.5 vol %, and then both values decreased when the CO₂ concentration further increased to 10 vol %. Accordingly, the photosystem II (PSII) reaction center quantity and the driving force per excited cross-section reached peaks of 628 and 2.72, respectively, at 7.5 vol % CO₂. Therefore, the Arthrospira carotenoid yield increased by 25% and peaked when the CO₂ concentration increased from 0.04% (air) to 7.5 vol %. This could provide guidance for engineering demonstration of large-scale microalgae cultivation.

中文翻译：

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微孔膜片曝气器改善660 m ²跑道池中烟道气CO _2的溶解和节肢螺旋藻细胞的光合特性

可以纯化煤化工厂的烟道气CO ₂，然后将其微藻吸收，以生产高价值的产品并实现CO ₂排放量的减少。CO的溶解₂从煤化学烟气使用微孔隔膜曝气（MDA），以促进HCO得到加强₃ ^-浓度用于提高光合特性的节旋藻在660米细胞²与2.5-10％（体积）CO滚道池塘₂气体。节肢动物光合电子转移的量子产率增加在配备MDA的水道池中，细胞可促进生物量增长15.5％。当CO ₂浓度从0.04％（空气）增加时，节肢动物细胞中光吸收（ABS / RC）和电子传输（ET ₀ / RC）的比能通量首先在23 h分别增加到3113和757的峰值。到7.5体积％，然后当CO ₂浓度进一步增加到10体积％时，两个值都降低。因此，在7.5vol％的CO _2下，光系统II（PSII）的反应中心量和每个受激截面的驱动力分别达到628和2.72的峰值。因此，节肢动物类胡萝卜素的产量增加了25％，并在CO ₂达到峰值时达到峰值。浓度从0.04％（空气）增加到7.5vol％。这可以为大规模微藻栽培的工程示范提供指导。