Flux balancing of light and nutrients in a biofilm photobioreactor for maximizing photosynthetic productivity
Flux balancing of light and nutrients in a biofilm photobioreactor for maximizing photosynthetic productivity
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DOI：
10.1002/btpr.1881
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
T. Murphy;H. Berberoǧlu
中科院分区：
文献类型：
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作者：
T. Murphy;H. Berberoǧlu
本文对多孔基质生物反应器的高效运行进行了实验和数值研究相结合的研究。一个综合了光传输、质量传输和藻类生长动力学的模型被用来理解光合作用生物膜的生产力对光子和营养物质输送速率的响应。正在考虑的反应器是一种蒸发驱动的多孔基质生物反应器(PSBR)，将蓝藻可变鱼腥藻作为生物膜培养在多孔基质上，向细胞输送水分和营养物质。在未经优化的实验条件下，该反应器的光合作用效率为2.3%，与传统的光生物反应器相比具有竞争力。此外，通过比例分析，根据微生物和生物反应器的特性，预测了磷酸盐输送速度将生长速度降低到其无抑制值的一半的位置。本文提出的数值模型和通量平衡技术可以作为设计和选择基于生物膜的栽培系统的操作参数的工具，以获得最大的生产率。©2014美国化学工程师学会生物技术。程序，30：348-359,2014
This article reports a combined experimental and numerical study on the efficient operation of Porous Substrate Bioreactors. A comprehensive model integrating light transport, mass transport, and algal growth kinetics was used to understand the productivity of photosynthetic biofilms in response to delivery rates of photons and nutrients. The reactor under consideration was an evaporation driven Porous Substrate Bioreactor (PSBR) cultivating the cyanobacteria Anabaena variabilis as a biofilm on a porous substrate which delivers water and nutrients to the cells. In an unoptimized experimental case, this reactor was operated with a photosynthetic efficiency of 2.3%, competitive with conventional photobioreactors. Moreover, through a scaling analysis, the location at which the phosphate delivery rate decreased the growth rate to half of its uninhibited value was predicted as a function of microorganism and bioreactor properties. The numerical model along with the flux balancing techniques presented herein can serve as tools for designing and selecting operating parameters of biofilm based cultivation systems for maximum productivity. © 2014 American Institute of Chemical Engineers Biotechnol. Prog., 30:348–359, 2014