Chemical and Materials Engineering Department, University of Alberta, Edmonton, Canada.
Bioresour Technol. 2011 May;102(10):5764-74. doi: 10.1016/j.biortech.2011.01.081. Epub 2011 Mar 5.
In this work, the time varying characteristics of microalgal cultures are investigated. Microalgae are a promising source of biofuels and other valuable chemicals; a better understanding of their dynamic behavior is, however, required to facilitate process scale-up, optimization and control. Growth and oil production rates are evaluated as a function of carbon and nitrogen sources concentration. It is found that nitrogen has a major role in controlling the productivity of microalgae. Moreover, it is shown that there exists a nitrogen source concentration at which biomass and oil production can be maximized. A mathematical model that describes the effect of nitrogen and carbon source on growth and oil production is proposed. The model considers the uncoupling between nutrient uptake and growth, a characteristic of algal cells. Validity of the proposed model is tested on fed-batch cultures.
本工作研究了微藻培养物的时变特性。微藻是生物燃料和其他有价值化学品的有前途的来源；然而，需要更好地了解它们的动态行为，以促进过程放大、优化和控制。评估了碳源和氮源浓度对生长和产油率的影响。结果表明，氮在控制微藻生产力方面起着重要作用。此外，还表明存在一个氮源浓度，可以使生物量和产油量最大化。提出了一个描述氮源和碳源对生长和产油影响的数学模型。该模型考虑了营养物质摄取和生长之间的解耦，这是藻类细胞的一个特征。在分批补料培养中对所提出模型的有效性进行了测试。
