在振荡流场中，通过减小曝气气泡的直径和增强溶液的传质来提高微藻的生长。
Improving microalgal growth with reduced diameters of aeration bubbles and enhanced mass transfer of solution in an oscillating flow field.
机构信息
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
出版信息
Bioresour Technol. 2016 Jul;211:429-34. doi: 10.1016/j.biortech.2016.03.127. Epub 2016 Mar 24.
A novel oscillating gas aerator combined with an oscillating baffle was proposed to generate smaller aeration bubbles and enhance solution mass transfer, which can improve microalgal growth in a raceway pond. A high-speed photography system (HSP) was used to measure bubble diameter and generation time, and online precise dissolved oxygen probes and pH probes were used to measure mass-transfer coefficient and mixing time. Bubble diameter and generation time decreased with decreased aeration gas rate, decreased orifice diameter, and increased water velocity in the oscillating gas aerator. The optimized oscillating gas aerator decreased bubble diameter and generation time by 25% and 58%, respectively, compared with a horizontal tubular gas aerator. Using an oscillating gas aerator and an oscillating baffle in a raceway pond increased the solution mass-transfer coefficient by 15% and decreased mixing time by 32%; consequently, microalgal biomass yield increased by 19%.
提出了一种新型的振荡式气体曝气器与振荡挡板相结合的方法，以产生更小的曝气气泡并增强溶液传质，从而提高养殖池中的微藻生长。使用高速摄影系统（HSP）测量气泡直径和生成时间，并且在线使用精密溶解氧探头和 pH 探头测量传质系数和混合时间。在振荡式气体曝气器中，气泡直径和生成时间随曝气气体速率、孔口直径和水速的降低而降低。与水平管式气体曝气器相比，优化后的振荡式气体曝气器可分别将气泡直径和生成时间降低 25%和 58%。在养殖池中使用振荡式气体曝气器和振荡挡板可将溶液传质系数提高 15%，并将混合时间缩短 32%；因此，微藻生物量产量提高了 19%。
Zotero 插件