Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
Bioresour Technol. 2019 Apr;277:55-61. doi: 10.1016/j.biortech.2019.01.035. Epub 2019 Jan 9.
Fly ashes present several minerals that along with carbon dioxide (CO) represent a promising nutrient source and an alternative to reduce environmental problems. Thus, the objective of this study was to investigate if CO, thermoelectric fly ashes and reduction in nitrogen supply alters the production of macromolecules in Chlorella fusca LEB 111. For this purpose, 1.5 or 0.75 g L of NaNO, injection of 10% (v v) of CO as well as 0, 40 and 120 ppm of fly ashes were studied. The protein content was not impaired in cultivations with 0.75 g L of NaNO since nitrogen was not fully consumed. Nevertheless, this cultivation strategy increased carbohydrate content by up to 25%, which could be fermented to produce bioethanol. Therefore, Chlorella fusca presented not only potential for CO biofixation and assimilation of nutrients from fly ashes but also for enhancement of carbohydrates accumulation when the nitrogen supply was reduced.
飞灰中存在几种矿物质，这些矿物质与二氧化碳 (CO) 一起代表了一种很有前途的营养来源和替代物，可以减少环境问题。因此，本研究的目的是研究 CO、热电飞灰和减少氮供应是否会改变 Chlorella fusca LEB 111 中大分子的产生。为此，研究了 1.5 或 0.75 g L 的 NaNO3、10%（v/v）的 CO 注射以及 0、40 和 120 ppm 的飞灰。在氮未完全消耗的情况下，用 0.75 g L 的 NaNO3 进行培养不会损害蛋白质含量。然而，这种培养策略使碳水化合物含量增加了高达 25%，这些碳水化合物可以发酵生产生物乙醇。因此，当氮供应减少时，Chlorella fusca 不仅具有 CO 固定和飞灰中营养物质同化的潜力，而且具有增强碳水化合物积累的潜力。
