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首页> 外文期刊>E3S Web of Conferences >Effect of light Intensity and photoperiod on growth of Chlorella pyrenoidosa and CO2 Biofixation
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Effect of light Intensity and photoperiod on growth of Chlorella pyrenoidosa and CO2 Biofixation

机译：光强度和光周期对 pyrenoidosa 生长和CO2生物固定的影响

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Microalgae have been viewed as one of potential solution for CO_(2)biofixation or CO_(2)sequestration. However, many factors need to be evaluated to support development of CO_(2)biofixation. One important environmental factor for the growth of micro algae is related with light requirement. The aim of this study was to evaluate the effect of light intensity and photoperiod on growth of Chlorellapyrenoidosa (C.pyrenoidosa) and CO_(2)biofixation. Experiments were carried out in 1000 mL semi batch photo bioreactors, purged continuously with air (0.034% CO_(2)). An Experiment of Factorial Design was employed in which the light intensity was evaluated 4 level at 2000, 4000, 6000 and 8000 lux with 3 level of photo period at L/D (light /dark) 8 hours/16 hours; L/D 12 hours/12 hours and L/D 16 hours/8 hours. The result indicated that both light intensity and photo period had significant effect (p< 0.05) on growth of C. pyrenoidosa . However, the photo period showed stronger effect relative to light intensity on growth of C.pyrenoidosa within the range reviewed. The interaction between the two factors was indicative but statistically not significant. Best growth profile sustained at combination of L/D 16 hours/8 hours of photoperiod and light intensity of 8000 lux with the highest average biomass observed at 0.516 ± 0.069gr/L. An increase in CO_(2)biofixation rate of around 2 times was also observed between highest setting (8000 lux; L/D 16/12 hours) relative to that of lowest setting (2000 lux; L/D 8/12 hours).
机译：微藻已被视为CO_（2）生物固定或CO_（2）隔离的潜在解决方案之一。但是，需要评估许多因素以支持CO_（2）生物固定的发展。微藻生长的重要环境因素之一是对光的需求。这项研究的目的是评估光强度和光周期对小球藻（C.pyrenoidosa）的生长和CO_（2）生物固定的影响。实验在1000 mL半批量光生物反应器中进行，并用空气（0.034％CO_（2））连续吹扫。使用阶乘设计实验，其中光强度在L / D（亮/暗）8小时/ 16小时的光周期为2000、4000、6000和8000 lux时分为4级; L / D 12小时/ 12小时和L / D 16小时/ 8小时。结果表明，光强和光周期均对拟南芥的生长具有显着影响（p <0.05）。然而，在所研究的范围内，光周期相对于光强度对拟南芥的生长表现出更强的影响。这两个因素之间的相互作用是指示性的，但统计学上不显着。在L / D 16小时/ 8小时的光周期和8000 lux的光强度的组合下，最佳的生长特性得以维持，在0.516±0.069gr / L的条件下观察到的平均生物量最高。相对于最低设置（2000 lux; L / D 8/12小时），最高设置（8000 lux; L / D 16/12小时）之间的CO_（2）生物固定率也增加了约2倍。

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