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Modeling of photosynthesis and respiration rate for microalgae–bacteria consortia
Biotechnology and Bioengineering ( IF 3.5 ) Pub Date : 2020-11-12 , DOI: 10.1002/bit.27625 Ana Sánchez Zurano 1 , Cintia Gómez Serrano 1 , F Gabriel Acién-Fernández 1 , Jose M Fernández-Sevilla 1 , Emilio Molina-Grima 1
Biotechnology and Bioengineering ( IF 3.5 ) Pub Date : 2020-11-12 , DOI: 10.1002/bit.27625 Ana Sánchez Zurano 1 , Cintia Gómez Serrano 1 , F Gabriel Acién-Fernández 1 , Jose M Fernández-Sevilla 1 , Emilio Molina-Grima 1
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In this article, the influence of culture conditions (irradiance, temperature, pH, and dissolved oxygen) on the photosynthesis and the respiration rates of microalgae–bacteria consortia in wastewater treatment was analyzed. Specifically, some short photo‐respirometric experiments, simulating outdoor raceway reactors, were performed to evaluate the response of microalgae, heterotrophic bacteria, and nitrifying bacteria to variations in environmental parameters. Results demonstrate that irradiance is the most dominant variable to determine microalgae photosynthesis rates. However, reduction in microalgae activity was not observed at higher irradiance, ruling out the existence of photoinhibition phenomena. Related to heterotrophic and nitrifying bacteria, their activities were strongly affected by the influence of temperature and pH. Moreover, the effect of dissolved oxygen concentrations on microalgae, and bacteria activities was studied, displaying a reduced photosynthetic rate at dissolved oxygen concentrations above 20 mg/L. Data have been used to develop an integrated model for each population (microalgae, heterotrophic bacteria, and nitrifying bacteria) based on considering the simultaneous influence of irradiance, temperature, pH, and dissolved oxygen. The models fit the experimental results in the range of culture conditions tested, and they were validated using data obtained by the simultaneous modifications of the variables. These individual models serve as a basis for developing a global biologic microalgae–bacteria model for wastewater treatment to improve the optimal design and management of microalgae‐based processes, especially outdoors, where the cultures are subject to variable daily culture conditions.
中文翻译：
微藻-细菌聚生体的光合作用和呼吸速率建模
在本文中，分析了培养条件（辐照度、温度、pH 值和溶解氧）对废水处理中微藻-细菌聚生体光合作用和呼吸速率的影响。具体而言，进行了一些模拟室外跑道反应器的短光呼吸测量实验，以评估微藻、异养细菌和硝化细菌对环境参数变化的响应。结果表明，辐照度是决定微藻光合作用速率的最主要变量。然而，在更高的辐照度下没有观察到微藻活性的降低，排除了光抑制现象的存在。与异养和硝化细菌有关，它们的活性受温度和 pH 值的影响很大。而且，研究了溶解氧浓度对微藻和细菌活动的影响，在溶解氧浓度高于 20 mg/L 时显示光合速率降低。基于考虑辐照度、温度、pH 值和溶解氧的同时影响，数据已被用于为每个种群（微藻、异养细菌和硝化细菌）开发集成模型。这些模型在测试的培养条件范围内拟合了实验结果，并使用通过同时修改变量获得的数据进行了验证。这些单独的模型作为开发用于废水处理的全球生物微藻-细菌模型的基础，以改进基于微藻的过程的优化设计和管理，尤其是在室外，
更新日期：2020-11-12
中文翻译：
微藻-细菌聚生体的光合作用和呼吸速率建模
在本文中，分析了培养条件（辐照度、温度、pH 值和溶解氧）对废水处理中微藻-细菌聚生体光合作用和呼吸速率的影响。具体而言，进行了一些模拟室外跑道反应器的短光呼吸测量实验，以评估微藻、异养细菌和硝化细菌对环境参数变化的响应。结果表明，辐照度是决定微藻光合作用速率的最主要变量。然而，在更高的辐照度下没有观察到微藻活性的降低，排除了光抑制现象的存在。与异养和硝化细菌有关，它们的活性受温度和 pH 值的影响很大。而且，研究了溶解氧浓度对微藻和细菌活动的影响，在溶解氧浓度高于 20 mg/L 时显示光合速率降低。基于考虑辐照度、温度、pH 值和溶解氧的同时影响，数据已被用于为每个种群（微藻、异养细菌和硝化细菌）开发集成模型。这些模型在测试的培养条件范围内拟合了实验结果，并使用通过同时修改变量获得的数据进行了验证。这些单独的模型作为开发用于废水处理的全球生物微藻-细菌模型的基础，以改进基于微藻的过程的优化设计和管理，尤其是在室外，
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