Department of Fisheries Engineering, Santa Catarina State University , Laguna , Brazil.
Department of Sanitary and Environmental Engineering, Federal University of Santa Catarina , Florianopolis , Brazil.
Environ Technol. 2019 Nov;40(25):3308-3317. doi: 10.1080/09593330.2018.1471103. Epub 2018 May 15.
This study evaluated productivity, CO biofixation, and lipid content in biomass of the acidophilic microalga LAFIC-004 cultivated with five different carbon dioxide concentrations. The influence of carbon dioxide concentration on nutrient removal and pH was also investigated. Treated wastewater (secondary effluent) was used as culture medium. Five experimental setups were tested: T-0% - injection of atmospheric air (0.038% CO), T-5% (5% CO), T-10% (10% CO), T-15% (15% CO) and T-20% (20% CO). The T-5% and T-10% experiments showed the highest values of productivity and CO biofixation, and maximum biomass dry weight was 0.48 ± 0.02 and 0.51 ± 0.03 g L, respectively. This acidophilic microalga proved to be suitable for carbon biofixation and removal of nutrients from secondary effluent of wastewater treatment plants with high CO concentration. All assays were performed without pH control. This microalga species presented high lipid content. However, fatty acid methyl esters (FAME) are not suitable for biodiesel use.
本研究评估了在五种不同二氧化碳浓度下培养的嗜酸微藻 LAFIC-004 的生产力、CO 固定和生物质中的脂质含量。还研究了二氧化碳浓度对养分去除和 pH 值的影响。处理后的废水（二级出水）用作培养基。测试了五个实验设置：T-0%-注入大气空气（0.038% CO），T-5%（5% CO），T-10%（10% CO），T-15%（15% CO）和 T-20%（20% CO）。T-5%和 T-10%实验显示出最高的生产力和 CO 固定值，最大生物量干重分别为 0.48±0.02 和 0.51±0.03 g/L。这种嗜酸微藻被证明适合于从高 CO 浓度的废水处理厂的二级出水中进行碳生物固定和养分去除。所有试验均未进行 pH 控制。该微藻种类的脂质含量很高。然而，脂肪酸甲酯（FAME）不适合用作生物柴油。
