State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
Bioresour Technol. 2021 Jan;320(Pt A):124337. doi: 10.1016/j.biortech.2020.124337. Epub 2020 Oct 31.
In this study, the Tesla-valve (TV) baffles were used to optimize the flow field in a column photobioreactor (PBR) in order to promote mass transfer of CO gas in the solution. The TV baffles were composed of many tilted plates with central holes and curved arcs facing downwards, installed along inner rising section of the column PBR. Many clockwise and anti-clockwise vortices were generated during the rising flow while passing through proposed TV baffles. An optimum TV baffle structure (30° plate angle, 8 cm arc width) decreased mixing time by 36.4% and increased the mass transfer coefficient by 50%. The TV baffles supported the movement of the A.platensis cells between light and dark regions to enhance their photochemical efficiency ϕPSII by 24.6% and Fv/Fm by 12.7%. Therefore, the biomass yield increased by 28.1% and exhibited an increased helix pitch and trichome length in comparison with traditional column PBR without baffles.
在这项研究中，我们使用特斯拉阀（Tesla-valve，TV）挡板来优化柱式光生物反应器（column photobioreactor，PBR）中的流场，以促进溶液中 CO 气体的传质。TV 挡板由许多带有中心孔的倾斜板组成，弧形面朝下，沿柱式 PBR 的内上升段安装。在上升流动过程中，当通过所提出的 TV 挡板时，会产生许多顺时针和逆时针的涡流。最佳的 TV 挡板结构（30°板角，8 cm 弧形宽度）将混合时间缩短了 36.4%，并将传质系数提高了 50%。TV 挡板支持 A.platensis 细胞在明区和暗区之间的运动，从而将其光化学效率 ϕPSII 提高了 24.6%，Fv/Fm 提高了 12.7%。因此，与没有挡板的传统柱式 PBR 相比，生物量产量提高了 28.1%，并表现出螺旋间距和藻丝长度增加。
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