期刊
BIORESOURCE TECHNOLOGY
卷 234, 期 -, 页码 140-149出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.03.028
关键词
Microalgae; Batch cultivation; Chlorella vulgaris; Mathematical model; Photobioreactor; Scale-up
资金
- Federal Ministry of Agriculture of the German Federal Republic (BMEL) [FKZ 22404011]
- Federal Ministry of Education and Research of the German Federal Republic (BMBF) [FKZ 03SF0465]
- Grant Agency of the Charles University, Praha, Czech Republic [82214]
Growth of Chlorella vulgaris was characterized as a function of irradiance in a laboratory turbidostat (1 L) and compared to batch growth in sunlit modules (5-25 L) of the commercial NOVAgreen photobioreactor. The effects of variable sunlight and culture density were deconvoluted by a mathematical model. The analysis showed that algal growth was light-limited due to shading by external construction elements and due to light attenuation within the algal bags. The model was also used to predict maximum biomass productivity. The manipulative experiments and the model predictions were confronted with data from a production season of three large-scale photobioreactors: NOVAgreen (<36,000 L), IGV (2,500-3,500 L), and Phytolutions (28,000 L). The analysis confirmed light-limitation in all three photobioreactors. An additional limitation of the biomass productivity was caused by the nitrogen starvation that was used to induce lipid accumulation. Reduction of shading and separation of biomass and lipid production are proposed for future optimization. (C) 2017 Elsevier Ltd. All rights reserved.
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