Biomass and pigment production for Arthrospira platensis via semi-continuous cultivation in photobioreactors: Temperature effects.,Biotechnology and Bioengineering

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Biomass and pigment production for Arthrospira platensis via semi-continuous cultivation in photobioreactors: Temperature effects.
Biotechnology and Bioengineering ( IF 3.5 ) Pub Date : 2020-06-29 , DOI: 10.1002/bit.27480
Ankush Karemore _{1,

2} , Yanhui Yuan ₃ , William Porubsky ₃ , Ronald Chance _{2,

3}

Affiliation

This study describes the response of Arthrospira platensis to a variety of temperature conditions as reflected in variations of photosynthetic parameters, pigmentation, and biomass productivity in indoor photobioreactor (PBR) cultivations. These experiments are designed to better understand the impact of temperature, seasonal variations, and acclimation effects on outdoor biomass production. The irradiance level and temperature range (20–39°C) are chosen to enable modeling of semi‐continuous operation of large‐scale outdoor PBR deployments. Overall, the cultivations are quite stable with some pigment‐related instabilities after prolonged high‐temperature exposure. Changes in productivity with temperature, as reflected in measured photosynthetic parameters, are immediate and mainly attributable to the temperature dependence of the photosaturation parameter, a secondary factor being variation in pigment content on a longer time scale corresponding to turnover of the culture population. Though pigment changes are not accompanied by significant changes in productivity, prolonged exposure at 35°C and above yields a clear degradation in performance. Productivities in a semi‐continuous operation are quantitatively reproduced with a productivity model incorporating photosynthetic parameters measured herein. This study confirms the importance of temperature for biomass and pigment production in Arthrospira cultivations and provides a basis for risk assessments related to temperature mitigation for large‐scale outdoor cultivations.

中文翻译：

通过在光生物反应器中半连续培养生产节旋藻的生物质和色素：温度效应。

本研究描述了钝顶节螺旋体的反应室内光生物反应器 (PBR) 栽培中光合参数、色素沉着和生物质生产力的变化所反映的各种温度条件。这些实验旨在更好地了解温度、季节变化和气候变化对室外生物量生产的影响。选择辐照度水平和温度范围 (20–39°C) 以实现大规模室外 PBR 部署的半连续操作的建模。总体而言，在长期高温暴露后，培养物非常稳定，存在一些与色素相关的不稳定性。生产力随温度的变化，反映在测量的光合参数中，是直接的，主要归因于光饱和参数的温度依赖性，第二个因素是色素含量在较长时间范围内的变化，这与培养种群的周转相对应。尽管颜料的变化不会伴随着生产力的显着变化，但长时间暴露在 35°C 及以上的温度会导致性能明显下降。半连续操作中的生产力通过包含此处测量的光合作用参数的生产力模型进行定量再现。这项研究证实了温度对生物量和色素生产的重要性半连续操作中的生产力通过包含此处测量的光合作用参数的生产力模型进行定量再现。这项研究证实了温度对生物量和色素生产的重要性半连续操作中的生产力通过包含此处测量的光合作用参数的生产力模型进行定量再现。这项研究证实了温度对生物量和色素生产的重要性节螺旋体栽培，并为与大规模户外栽培的温度缓解相关的风险评估提供基础。

更新日期：2020-06-29

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