Growth and biochemical characteristics of an indigenous freshwater microalga, Scenedesmus obtusus, cultivated in an airlift photobioreactor: effect of reactor hydrodynamics, light intensity, and photoperiod
Growth and biochemical characteristics of an indigenous freshwater microalga, Scenedesmus obtusus, cultivated in an airlift photobioreactor: effect of reactor hydrodynamics, light intensity, and photoperiod
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DOI：
10.1007/s00449-017-1768-0
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发表时间：
2017-07-01
影响因子：
3.8
通讯作者：
Mudliar, S. N.
中科院分区：
文献类型：
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作者：
Chandra, T. Sarat;Aditi, S.;Mudliar, S. N.
在3.4 L气升式光生物反应器中培养了淡水绿藻钝顶栅藻。估算了不同进口气体流量(1、2、3和4LPM)下的水动力参数，并研究了它们对微藻生长和生化特性的影响。当流速从1升到4升时，生物量浓度和生产力增加。在3LPM时，L的生物量生产力最高可达0.07g·d~(-1)。随着气体进口流量从1增加到4 LPM，总碳水化合物含量从19.6%增加到26.4%。没有观察到总脂肪酸含量的主要变化。研究了光照对钝顶螺旋藻生长和生化特性的影响。在连续光照下，当照度为0.103×10~(-2)×10~(-2)L~(-1)时，生物量生产力达到最大值，达0.103克·天~(-1)。已报道的主要脂肪酸是棕榈酸(C16：0)、α-亚麻酸(C18：3)、亚油酸(C18：2)和油酸(C18：1)。对不同培养条件下微藻的生物柴油性质进行了评价。对气升式反应器内的光分布进行了实验测量，并对光分布的预测模型进行了尝试。
The freshwater green algae, Scenedesmus obtusus, was cultivated in a 3.4 L airlift photobioreactor. The hydrodynamic parameters were estimated at different inlet gas flow rates (1, 2, 3, and 4 LPM) and their subsequent impact on the growth and biochemical characteristics of microalgae was studied. The biomass concentration and productivity increased with an increase in flow rates from 1 to 4 LPM. A maximum of 0.07 g L-1 day(-1) productivity of biomass was attained at 3 LPM. An increase of total carbohydrate content from 19.6 to 26.4% was noticed with increment in the inlet flow rate of gas from 1 to 4 LPM. Major variations in total fatty acid content were not observed. The impact of light irradiance on growth and biochemical characteristics of S. obtusus was also evaluated. A maximum biomass productivity of 0.103 g L-1 day(-1) was attained at an illumination of 150 mu mol m(-2) s(-1) under continuous light. The major fatty acids reported were palmitic acid (C16:0), alpha-linolenic acid (C18:3), linoleic acid (C18:2), and oleic acid (C18:1). Biodiesel properties of the microalgae were estimated under various culture conditions. The light profile inside the airlift reactor was experimentally measured and the predictive modelling of light profile was also attempted.