State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
Sci Total Environ. 2021 Mar 15;760:143941. doi: 10.1016/j.scitotenv.2020.143941. Epub 2020 Dec 4.
A staggered woven mesh (SWM) aerator equipped with three variable-micropore layers was developed to enhance the CO conversion into HCO in a recycling water pipeline for promoting CO utilization efficiency and Arthrospira growth in large-scale raceway ponds. The input CO gas was broken into smaller bubbles (0.78- 2.43 mm) through the first-stage shear with axial rectangles, second-stage shear with radial rectangles (equivalent pore diameter = 150 μm), and third-stage shear with uniform micropores. A high-speed camera (MotionXtra HG-100K CMOS) and an Image J image processing software were employed to capture the bubble pictures. Compared to the traditional steel pipe (TSP) aerator, the bubble generation diameter and time in the SWM aerator reduced by 72.3% and 48.6%, respectively. The optimized structure (ε = 14, pore = 23 μm) of the SWM aerator promoted the carbonization efficiency and HCO conversion efficiency into biomass by 78.6% and 64.6% than the TSP aerator. Further, the chlorophyll fluorescence and biomass measurements showed an increase in the actual photochemical efficiency (analyzed by Hansatech FMS1 chlorophyll fluorescence instrument) and biomass yield by 1.8 times and 80.1%.
一种带有三层变微孔层的交错编织网（SWM）曝气器被开发出来，以提高 CO 在循环水管道中的 HCO 转化率，从而提高 CO 利用率和大型跑道池中的螺旋藻生长效率。输入的 CO 气体通过第一阶段的轴向矩形剪切、第二阶段的径向矩形剪切（等效孔径=150μm）和第三阶段的均匀微孔剪切分解成更小的气泡（0.78-2.43mm）。高速摄像机（MotionXtra HG-100K CMOS）和 Image J 图像处理软件用于拍摄气泡图像。与传统的钢管（TSP）曝气器相比，SWM 曝气器中的气泡生成直径和时间分别减少了 72.3%和 48.6%。SWM 曝气器的优化结构（ε=14，孔=23μm）将碳化效率和 HCO 转化为生物质的效率分别提高了 78.6%和 64.6%，优于 TSP 曝气器。此外，叶绿素荧光和生物量测量显示，实际光化学效率（通过 Hansatech FMS1 叶绿素荧光仪分析）和生物量产量分别提高了 1.8 倍和 80.1%。
