用于微藻培养中二氧化碳供应的膜式气体分布器的创新发展。
Innovative development of membrane sparger for carbon dioxide supply in microalgae cultures.
作者信息
Moraes Luiza, da Rosa Gabriel M, Santos Lucielen O, Costa Jorge A V
机构信息
Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
Laboratory of Biotechnology, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
出版信息
Biotechnol Prog. 2020 Jul;36(4):e2987. doi: 10.1002/btpr.2987. Epub 2020 Mar 13.
The present study was aimed to develop a membrane sparger (MS) integrated into a tubular photobioreactor to promote the increase of the carbon dioxide (CO ) fixation by Spirulina sp. LEB 18 cultures. The use of MS for the CO supply in Spirulina cultures resulted not only in the increase of DIC concentrations but also in the highest accumulated DIC concentration in the liquid medium (127.4 mg L d ). The highest values of biomass concentration (1.98 g L ), biomass productivity (131.8 mg L d ), carbon in biomass (47.9% w w ), CO fixation rate (231.6 mg L d ), and CO use efficiency (80.5% w w ) by Spirulina were verified with MS, compared to the culture with conventional sparger for CO supply. Spirulina biomass in both culture conditions had high protein contents varying from 64.9 to 69% (w w ). MS can be considered an innovative system for the supply of carbon for the microalgae cultivation and biomass production. Moreover, the use of membrane system might contribute to increased process efficiency with a reduced cost of biomass production.
本研究旨在开发一种集成到管式光生物反应器中的膜曝气器（MS），以促进螺旋藻LEB 18培养物中二氧化碳（CO₂）固定量的增加。在螺旋藻培养中使用MS供应CO₂，不仅导致溶解无机碳（DIC）浓度增加，还使液体培养基中积累的DIC浓度达到最高（127.4 mg L⁻¹ d⁻¹）。与使用传统曝气器供应CO₂的培养相比，使用MS验证了螺旋藻的生物量浓度（1.98 g L⁻¹）、生物量生产率（131.8 mg L⁻¹ d⁻¹）、生物量中的碳含量（47.9% w/w）、CO₂固定率（231.6 mg L⁻¹ d⁻¹）和CO₂利用效率（80.5% w/w）的最高值。在两种培养条件下，螺旋藻生物量的蛋白质含量都很高，在64.9%至69%（w/w）之间变化。MS可被视为一种用于微藻培养和生物量生产的碳供应创新系统。此外，膜系统的使用可能有助于提高工艺效率，同时降低生物量生产成本。
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