在气升式生物反应器中使用静态混合元件对气液两相的氧传递性能与喷嘴结构、通气水平、装液量之间的变化规律作了初步实验研究。实验结果表明，通气量的提高有助于氧传质系数 Ｋ Ｌａ值的提高，并确定了该反应器的最佳结构和操作条件 In the airlift bioreactor, static mixing elements were used to preliminary study the oxygen transfer performance of gas-liquid two phase and the variation of nozzle structure, aeration level and liquid loading. The experimental results show that the increase of aeration contributes to the increase of oxygen mass transfer coefficient K La, and the optimum structure and operating conditions of the reactor