Effects of CO2 concentration and light intensity on macromolecules accumulation of Micractinium sp.

文献类型： 外文期刊

第一作者： Xu, Shannan

作者： Xu, Shannan;Liu, Yong;Xu, Shannan;Liu, Yong;Xu, Shannan;Liu, Yong;Hu, Shuanhu;Zhu, Kai;Wang, Shuang;Chen, Hao;Barati, Bahram;Lakshmikandan, Manogaran

作者机构：

关键词： Microalgae; Micractinium sp.,; CO2; Response surface methodology (RSM); Lipid enhancement

期刊名称：BIOMASS & BIOENERGY （ 影响因子：5.774； 五年影响因子：5.5 ）

ISSN： 0961-9534

年卷期： 2022 年 163 卷

页码：

收录情况： SCI

摘要： Economically efficient biomass production is crucial to lift the microalgal circular bioeconomy requiring low production cost with higher biomass and value-added products. In this study, Micractinium sp. YACCYB505 was cultured at different illuminations (1600, 2400, 3200 lux) and CO2 conditions (up to 10%) to evaluate biomass productivity and accumulation of macromolecules (lipid, carbohydrate and protein). The product optimization study was conducted to analyze individual variables of environmental factors by using a Box-Behnken design. Highlight intensity (3200 lux) and 5% CO2 aeration maximized biomass productivity on 11th day of microalgal harvest. Microalgal lipid accumulation indicated positive impact on increased CO2 aeration and light intensity treatment. Similarly, a considerable amount of protein content (9%) was increased at higher CO2 aeration but raised light intensity had a negative impact on protein biosynthesis. Significant carbohydrate content reduction was observed with increased light intensity and CO2 aeration. The overall results proved that increased CO2 concentration (10%) and light intensity (3200 lux) enhanced lipid accumulation (32%) and biomass productivity in Micractinium sp., which provides potential to achieve a sustainable, cost-effective biomass and value-added products.

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