Modelling of Scenedesmus obliquus

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• 作者：Abuzer Ç ; elekli ; Muharrem Balc&#x131 ; Hü ; seyin Bozkurt
• 关键词：Biovolume ; Gompertz model ; Nutrient ; Scenedesmus obliquus
• 刊名：Bioresource Technology
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：99
• 期：18
• 页码：8742-8747
• 全文大小：862 K

文摘

This study attempted to investigate variation in biovolume of Scenedesmus obliquus, in the modified Johnson medium at 20 ± 2 °C, under 16 kerg cmp>−2p> sp>−1p> continuous illumination. The experiments were carried out at four nitrate (8, 12, 16, and 20 mM) and four phosphate (0.1, 0.3, 0.5 and 0.7 mM) concentrations at pH 7 and 8. The best response for algal growth was found at 0.3 mM phosphate and 12 mM nitrate at pH 7, as it was obtained from weight averaging method. Besides, optimum phosphate and nitrate concentrations significantly distinguished (p < 0.01) from other concentrations according to Tukey’s HSD test. Key features of the growth of S. obliquus under phosphate and nitrate influenced batch culture was successfully predicted by modified Gompertz model. Through the cultivations, specific growth rate (μ) ranged from 0.30 to 1.02 dayp>−1p>, while biovolume doubling time (td) varied from 0.68 to 2.30 days. There were important differences (p < 0.05) for both μ and td among response variables. Both nutrients displayed noteworthy effect (p < 0.01) on the algal biovolume.