Rubio FC, Fernandez FG, Perez JA, Camacho FG, Grima EM
Department of Chemical Engineering, University of Granada, Granada, Spain.
Biotechnol Bioeng. 1999 Jan 5;62(1):71-86. doi: 10.1002/(sici)1097-0290(19990105)62:1<71::aid-bit9>3.0.co;2-t.
A model is developed for prediction of axial concentration profiles of dissolved oxygen and carbon dioxide in tubular photobioreactors used for culturing microalgae. Experimental data are used to verify the model for continuous outdoor culture of Porphyridium cruentum grown in a 200-L reactor with 100-m long tubular solar receiver. The culture was carried out at a dilution rate of 0.05 h-1 applied only during a 10-h daylight period. The quasi-steady state biomass concentration achieved was 3.0 g. L-1, corresponding to a biomass productivity of 1.5 g. L-1. d-1. The model could predict the dissolved oxygen level in both gas disengagement zone of the reactor and at the end of the loop, the exhaust gas composition, the amount of carbon dioxide injected, and the pH of the culture at each hour. In predicting the various parameters, the model took into account the length of the solar receiver tube, the rate of photosynthesis, the velocity of flow, the degree of mixing, and gas-liquid mass transfer. Because the model simulated the system behavior as a function of tube length and operational variables (superficial gas velocity in the riser, composition of carbon dioxide in the gas injected in the solar receiver and its injection rate), it could potentially be applied to rational design and scale-up of photobioreactors. Copyright 1999 John Wiley & Sons, Inc.
开发了一个模型，用于预测用于培养微藻的管式光生物反应器中溶解氧和二氧化碳的轴向浓度分布。实验数据用于验证该模型，该模型针对在一个200升反应器中、带有100米长管状太阳能接收器的条件下对紫球藻进行连续室外培养的情况。培养以0.05 h-1的稀释率进行，且仅在10小时的白天时段施加。所达到的准稳态生物质浓度为3.0 g·L-1，对应生物质生产率为1.5 g·L-1·d-1。该模型能够预测反应器气体分离区以及回路末端的溶解氧水平、废气组成、注入的二氧化碳量以及每小时培养物的pH值。在预测各种参数时，该模型考虑了太阳能接收器管的长度、光合作用速率、流速、混合程度和气液传质。由于该模型将系统行为模拟为管长和操作变量（提升管中的表观气体流速、注入太阳能接收器的气体中二氧化碳的组成及其注入速率）的函数，因此它有可能应用于光生物反应器的合理设计和放大。版权所有1999约翰威立父子公司。
