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对带波纹隔板的平板式生物反应器,利用计算流体动力学进行流场模拟,验证模型可靠性后,系统分析波纹隔板高/波长(L/λ)和波幅/波长(A/λ)两个波纹隔板结构参数对反应器传质及流动混合特性的影响.结果表明,当L/λ=12时,传质及流动混合性能较好,液相体积传质系数(kLa)、平均湍动能(Em)、下降区停留时间占循环一周时间之比(θ)等表征传质及混合的参数值均较大,得到的液体流速在微藻生长的最佳流速附近.当A/λ=0.8时,反应器的传质性能最优,kLa比采用平直隔板时增加了约10%;当A/λ=0.4时,反应器的混合效果最佳,Em比采用平直隔板时增加14.7%.
For the plate-type bioreactor with corrugated baffles, the flow field simulation was carried out by computational fluid dynamics (CFD), and the reliability of the model was verified. The results showed that the ratio of height / wavelength (A / λ) The effect of two corrugated diaphragms on the mass transfer and flow mixing characteristics of the reactor was investigated. The results show that when L / λ = 12, the mass transfer and flow mixing performance are better. The volumetric mass transfer coefficient (kLa) The turbulent kinetic energy (Em), the ratio of the dwell time in the descending zone to the cycle time (θ), and other parameter values that characterize the mass transfer and mixing are large, and the resulting liquid flow rate is near the optimum flow rate for microalgae growth. = 0.8, the mass transfer performance of the reactor was the best, kLa increased by about 10% when using the flat separator; When A / λ = 0.4, the mixing effect of the reactor was the best, Em than the flat separator When increased by 14.7%.