Performance of Chlorella sorokiniana under simulated extreme winter conditions.
Performance of Chlorella sorokiniana under simulated extreme winter conditions.
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DOI：
10.1007/s10811-011-9687-y
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发表时间：
2012-08
影响因子：
3.3
通讯作者：
Wijffels, Rene H.
中科院分区：
文献类型：
--
作者：
Cuaresma Franco, Maria;Buffing, Marieke F.;Janssen, Marcel;Vilchez Lobato, Carlos;Wijffels, Rene H.
只有在不同季节有效利用太阳光，才能实现高的微藻年产量。在冬季，由于光照和温度条件，生产力很低。在西班牙南部的韦尔瓦，在冬季发现的最坏情况下，小球藻sorokiniana的生产力和光合效率进行了评估。在实验室规模的光生物反应器中模拟了冬季的最大光强（800 μmol光子m-2 s-1）和温度（20°C），光路为14 mm。应用恒化器条件，并将结果与38°C（C. sorokiniana）。当温度为最佳时，在0.18 h-1的稀释率（P v = 0.28 g Kg-1 h-1）下发现最高的生产率，并且在光能上的生物质产量高（Y x，E = 1.2 g mol-1光子供应）。但在次适温条件下，C. Sorokiniana的浓度令人惊讶地低，不能支持在高于0.02h-1的稀释速率下的连续操作。次适温度下的缓慢代谢导致细胞的光能需求下降。因此，最大的冬季辐照度是过度的，导致低的光合效率和生产力（Y x，E = 0.5 g mol-1光子供应，P v = 0.1 g Kg-1 h-1）。在次适温度下，观察到较高的类胡萝卜素与叶绿素的比率，表明光耗散过程的激活。我们的结论是，温度控制和/或光稀释在冬季的时间将提高生产力。
High annual microalgae productivities can only be achieved if solar light is efficiently used through the different seasons. During winter the productivity is low because of the light and temperature conditions. The productivity and photosynthetic efficiency of Chlorella sorokiniana were assessed under the worst-case scenario found during winter time in Huelva, south of Spain. The maximum light intensity (800 μmol photons m-2 s-1) and temperature (20°C) during winter were simulated in a lab-scale photobioreactor with a short light-path of 14 mm. Chemostat conditions were applied and the results were compared with a temperature-controlled situation at 38°C (optimal growth temperature for C. sorokiniana). When temperature was optimal the highest productivity was found at a dilution rate of 0.18 h-1 (P v = 0.28 g Kg-1 h-1), and the biomass yield on light energy was high (Y x,E = 1.2 g mol-1 photons supplied). However, at suboptimal temperature, the specific growth rate of C. sorokiniana was surprisingly low, not being able to support continuous operation at a dilution rate higher than 0.02 h-1. The slow metabolism under suboptimal temperature resulted in a decline of the light energy requirements of the cells. Consequently, the maximum winter irradiance was experienced as excessive, leading to a low photosynthetic efficiency and productivity (Y x,E = 0.5 g mol-1 photons supplied, P v = 0.1 g Kg-1 h-1). At suboptimal temperature a higher carotenoid-to-chlorophyll ratio was observed indicating the activation of light-dissipating processes. We conclude that temperature control and/or light dilution during winter time will enhance the productivity.
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DOI：
10.1016/j.cep.2008.04.007
发表时间：
2009-01-01
影响因子：
4.3
作者：
Jacob-Lopes, Eduardo;Gimenes Scoparo, Carlos Henrique;Franco, Telma Teixeira
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
BOUMNICH, L
影响因子：
5.7
作者：
SPEARING, AM;KARLANDER, EP
通讯作者：
KARLANDER, EP
影响因子：
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作者：
Zittelli, Graziella Chini;Rodolfi, Liliana;Tredici, Mario R.
通讯作者：
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