Prediction of volumetric productivity of an outdoor photobioreactor
Prediction of volumetric productivity of an outdoor photobioreactor
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DOI：
10.1002/bit.21319
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发表时间：
2007-08-01
影响因子：
3.8
通讯作者：
Wijffels, Rene H.
中科院分区：
文献类型：
--
作者：
Bosma, Rouke;van Zessen, Erik;Wijffels, Rene H.
利用数学模型对室外中试鼓泡塔中栽培的松藻的容积生产率进行了预测。选择了两种边界情况来模拟光生物反应器。首先，没有光集成的模型，其中假设微藻可以立即适应当地的光照条件。第二，全光集成，这意味着微生物能转换所有吸收的光，具有基于平均光强的光合产量。由于我们的光生物反应器中的温度和光照条件在白天发生变化，因此需要在任何温度和光照强度组合下的光合产量。这些都是在重复的实验室规模的实验设计的批量实验中确定的。在室外鼓泡塔中，在不同的自然光照条件和不同的温度下对模型进行了评价。预测了鼓泡塔中的体积生产率，并与实验体积生产率进行了比较。轻整合模型高估了生产力，而我们假设没有轻整合的模型低估了生产力。光集成发生部分（47%）在调查期间。在光照下观察到的平均生物量产量为0.60 g（.）mol（-1）。部分光集成模型预测的平均生物量产量为0.57克（。）mol（-1），并预测如果培养温度保持在24 ℃，产率可提高19%。
Volumetric productivity of Monodus subterraneus cultivated in an outdoor pilot-plant bubble column was predicted with a mathematical model. Two border cases to model the photobioreactor were chosen. Firstly, a model with no light integration in which it is assumed that microalgae can adapt immediately to local light conditions. Secondly, full light integration implicating that microalga can convert all absorbed light with a photosynthetic yield based on average light intensity. Because temperature and light conditions in our photobioreactor changed during the day, photosynthetic yields at any combination of temperature and light intensity were needed. These were determined in repeated-batch lab-scale experiments with an experimental design. The model was evaluated in an outdoor bubble column at different natural light conditions and different temperatures. Volumetric productivities in the bubble column were predicted and compared with experimental volumetric productivities. The light integration model over-estimated productivity, while the model in which we assumed no light integration under-estimated productivity. Light integration occurred partly (47%) during the period investigated. The average observed biomass yield on light was 0.60 g(.)mol(-1). The model of partly light integration predicted an average biomass yield on light of 0.57 g(.)mol(-1) and predicted that productivity could have been increased by 19% if culture temperature would have been maintained at 24 degrees C.