Bioprocess Intensification Group, Federal University of Santa Maria, UFSM, Roraima Avenue 1000, 97105-900 Santa Maria, RS, Brazil.
Bioprocess Intensification Group, Federal University of Santa Maria, UFSM, Roraima Avenue 1000, 97105-900 Santa Maria, RS, Brazil.
Bioresour Technol. 2020 Oct;314:123745. doi: 10.1016/j.biortech.2020.123745. Epub 2020 Jun 26.
This research evaluated the carbon dioxide capture and use by Scenedesmus obliquus in a photobioreactor under different CO loads. Performance indicators, carbon and energy balances, sustainability indicators, and carbon credits on the photobioreactor were assessed. The results expressed that the CO loads of 384.9 kg/m/d (15% CO) provide the best trade-off for the process. For this condition, maximum biomass productivities of 0.36 kg/m/d, carbon dioxide conversion rates of 0.44 kgCO/m/d, and oxygen release rates of 0.33 kgO/m/d were observed, reaching maximum CO removal efficiencies of 30.76%. Volatile organic compounds were the major products generated (>80%). However, only <3% was fixed in biomass. From the environmental and economic point of view, the net energy ratio was 3.44, while the potential carbon credit was of 0.04 USD per m of culture. Finally, the use of adequate CO loads was also proven to be determinant to improve the global performance of the system.
本研究评估了斜生栅藻在光生物反应器中在不同 CO 负荷下的二氧化碳捕获和利用。评估了光生物反应器的性能指标、碳和能量平衡、可持续性指标和碳信用额。结果表明，CO 负荷为 384.9kg/m/d（15% CO）为该过程提供了最佳的权衡。在这种条件下，观察到最大生物质生产力为 0.36kg/m/d，二氧化碳转化率为 0.44kgCO/m/d，氧气释放率为 0.33kgO/m/d，达到最大 CO 去除效率为 30.76%。挥发性有机化合物是主要生成的产物（>80%）。然而，只有<3%被固定在生物质中。从环境和经济角度来看，净能比为 3.44，而潜在的碳信用额为每立方米培养物 0.04 美元。最后，证明适当的 CO 负荷的使用对于提高系统的全球性能也是决定性的。
