Indirect regulation of temperature in raceway reactors by optimal management of culture depth,Biotechnology and Bioengineering

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Indirect regulation of temperature in raceway reactors by optimal management of culture depth
Biotechnology and Bioengineering ( IF 3.5 ) Pub Date : 2020-12-03 , DOI: 10.1002/bit.27642
E Rodríguez-Miranda ₁ , J L Guzmán ₂ , F G Acién ₃ , M Berenguel ₂ , A Visioli ₁

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Temperature and irradiance are the two most relevant factors determining the performance of microalgae cultures in open raceway reactors. Moreover, inadequate temperature strongly reduces the biomass productivity in these systems even if enough sunlight is available. Controlling the temperature in large open raceway reactors is considered unaffordable because of the large amount of energy required. This study presents an indirect method for temperature regulation in microalgae raceway reactors by optimizing the culture depth. First, the effect of the culture depth on the raceway temperature is analyzed for different seasons of the year. Afterward, a simulation study is presented where the proposed control approach is compared to the normal operation mode with constant volume in the reactor. This study is also extended to industrial scale. Relevant improvements on the temperature factor and biomass production are presented. The developed knowledge allows the improvement of the performance in open raceway reactors up to 12% without involving additional energy and costs, being a suitable solution for large industrial reactors that until now have no options for controlling the temperature.

中文翻译：

通过优化培养深度管理间接调节管道反应器中的温度

温度和辐照度是决定开放式管道反应器中微藻培养性能的两个最相关的因素。此外，即使有足够的阳光，温度不足也会大大降低这些系统中的生物质生产力。由于需要大量能量，控制大型开放式管道反应器的温度被认为是无法负担的。本研究提出了一种通过优化培养深度来间接调节微藻管道反应器温度的方法。首先，分析了一年中不同季节培养深度对滚道温度的影响。随后，提出了一项模拟研究，其中将所提出的控制方法与反应器中具有恒定体积的正常操作模式进行了比较。这项研究还扩展到工业规模。提出了温度因素和生物质产量的相关改进。所开发的知识允许在不涉及额外能源和成本的情况下将开放式管道反应器的性能提高多达 12%，是迄今为止无法控制温度的大型工业反应器的合适解决方案。

更新日期：2020-12-03

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