Environmental Science Department, University of Lahore (UOL), Raiwind Road, Lahore, Pakistan; Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, University of Queensland, Brisbane, Queensland 4072, Australia.
Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, University of Queensland, Brisbane, Queensland 4072, Australia.
J Environ Manage. 2019 Jul 1;241:243-250. doi: 10.1016/j.jenvman.2019.03.118. Epub 2019 Apr 18.
Sustainability assessments have revealed that integration of CO from coal-fired flue gas with microalgae cultivation systems could reduce greenhouse gas emissions. The technical goal of this integration is to utilize exhaust from coal power plants to enhance microalgae cultivation processes by capturing and recycling of carbon dioxide from a more toxic to a less toxic form. However, heavy metals are also introduced along with CO2 to the cultivation system which could contaminate biomass and have deleterious effects on products derived from such systems. The present study aimed at shedding some light on capability of microalgae to sustain their diversity and propagate them under different CO concentrations from coal-fired flue gas. Mixed microalgal culture was grown in nutrient rich medium and heavy metals (Al, Cu, Fe, Mn and Zn) are expected to be introduced from flue gas. Three concentrations (1%, 3% and 5.5%) of CO were evaluated (reference concentrations from flue gas). Comparative studies were carried out by flue gas and control systems in photobioreactors. Under the 3% CO (30% flue gas), the highest fraction of B, Mn and Zn were found to be internalized by the cells (46.8 ±9.45 gL-1, 253.66 ± 40.62 gL-1 and 355.5 ±50.69 gL-1 respectively) during their cultivation period into biomass. Hence, microalgae may offer solution to two major challenges: providing potential biofuel feedstock for energy security and reducing heavy metal pollution to the air.
可持续性评估表明，将燃煤烟气中的 CO 与微藻培养系统集成，可以减少温室气体排放。这种集成的技术目标是利用燃煤电厂的废气，通过将二氧化碳从毒性更大的形式捕获和转化为毒性更小的形式，来增强微藻的培养过程。然而，重金属也会随着 CO2 一起被引入到培养系统中，从而污染生物质，并对这些系统产生的产品产生有害影响。本研究旨在探讨微藻在不同浓度的燃煤烟气 CO 下维持多样性并繁殖的能力。混合微藻培养在营养丰富的培养基中生长，预计会从烟道气中引入重金属（Al、Cu、Fe、Mn 和 Zn）。评估了三种浓度（1%、3%和 5.5%）的 CO（烟道气中的参考浓度）。在光生物反应器中，通过烟道气和控制系统进行了对比研究。在 3%的 CO（30%的烟道气）下，细胞内化的 B、Mn 和 Zn 比例最高（分别为 46.8 ±9.45 g/L、253.66 ± 40.62 g/L 和 355.5 ±50.69 g/L）在它们的培养期间进入生物质。因此，微藻可能为两个主要挑战提供解决方案：为能源安全提供潜在的生物燃料原料，并减少重金属对空气的污染。
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