Many aspects can influence the CO₂ biofixation efficiency by microalgae, including CO₂ concentration, initial biomass concentration and photobioreactor configuration. This study evaluated two photobioreactors (raceway and tubular) and two initial biomass concentrations (0.2 and 0.4 g L⁻¹) in the growth parameters and in the CO₂ biofixation by Spirulina sp. LEB 18 cultures. The carbon source was replaced by 10% (v/v⁻¹) of CO₂ (0.05 vvm). Tubular photobioreactor cultures provided an increase of 43 and 62%, respectively, in the maximum specific growth rate and in the CO₂ biofixation efficiency, compared with the raceway photobioreactor cultures. The lowest initial biomass concentration evaluated (0.2 g L⁻¹) increased the growth parameter results, with a maximum specific growth rate of 42% higher than the cultures using the highest initial biomass concentration (0.4 g L⁻¹). Spirulina sp. LEB 18 cultures in tubular photobioreactor with 0.2 g L⁻¹ of initial biomass concentration showed a potential for CO₂ biofixation.

中文翻译：

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通过螺旋藻sp的CO 2生物固定。文化：管状和跑道光生物反应器中初始生物量浓度的评估

许多方面可以通过微藻影响CO _2的生物固定效率，包括CO ₂浓度，初始生物量浓度和光生物反应器配置。本研究中评价了两种光生物反应器（滚道和管状的）和两个初始生物量浓度（0.2和0.4克L- ^-1在生长参数，并在CO）₂通过biofixation螺旋藻属。LEB 18种文化。用10％（v / v ^-1）的CO ₂（0.05vvm）代替碳源。管状光生物反应器培养的最大比生长速率和CO ₂分别增加了43％和62％与滚道光生物反应器培养相比，生物固定效率更高。评估的最低初始生物量浓度（0.2 g L ^-1）增加了生长参数结果，最大比生长速率比使用最高初始生物量浓度（0.4 g L ^-1）的培养物高42％。螺旋藻藻。管状光生物反应器中初始生物量浓度为0.2 g L ^-1的LEB 18培养物显示出CO ₂生物固定的潜力。