This study investigated the influence of the geometry of the draft tube on the mass transfer and energy efficiency in the airlift reactor with helical sieve plate (ALR-HSP). The power consumption efficiency was 46%–53% higher than the control condition by optimizing the draft tube. A set of empirical equations was used to describe the gas holdup and volumetric mass transfer coefficients corresponding to the geometry of draft tubes in the ALR-HSP for the water–air system. The comparative cultivation of Pichia pastoris was carried out using the ALR-HSP and the conventional airlift reactor (CALR). The biomass increased by 20%, the maximal specific growth rate during the logarithmic growth phase nearly doubled, and volumetric oxygen transfer coefficient increased by 21%–47% under the same culture conditions. Results preliminarily demonstrated the superior performance and practicability of the ALR-HSP in enhancing oxygen transfer efficiency and aerobic biological reaction efficiency.

这项研究调查了引流管的几何形状对带有螺旋筛板（ALR-HSP）的气举反应堆中传质和能量效率的影响。通过优化引流管，功耗效率比控制条件高46％–53％。使用一组经验方程式来描述与水-空气系统的ALR-HSP中的导流管几何形状相对应的气体滞留率和体积传质系数。毕赤酵母的比较栽培使用ALR-HSP和常规的空运反应堆（CALR）进行。在相同的培养条件下，生物量增加了20％，对数生长期的最大比生长几乎翻了一倍，而体积氧转移系数增加了21％至47％。结果初步证明了ALR-HSP在提高氧气转移效率和有氧生物反应效率方面的优越性能和实用性。