Flux decline in crossflow microfiltration and ultrafiltration: mechanisms and modeling of membrane fouling
Flux decline in crossflow microfiltration and ultrafiltration: mechanisms and modeling of membrane fouling
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DOI：
10.1016/s0376-7388(97)00263-9
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发表时间：
1998-02
影响因子：
9.5
通讯作者：
Lianfa Song
中科院分区：
文献类型：
--
作者：
Lianfa Song
将膜污染看作是一个从非平衡态到平衡态的动态过程，研究了错流超滤和微滤过程中通量的衰减。在初始段边界条件和交叉流的影响下，在交叉流过滤器的初始段首先达到平衡，并且平衡区域的前部随时间向过滤器的末端推进。建立了描述这一动态过程的数学模型，并给出了该模型的封闭解。利用该模型，可以很容易地确定在错流过滤中随时间变化的通量和达到稳定状态所需的时间。模拟了不同条件下的结垢过程，作为新开发的模型的说明和演示。
Flux decline in crossflow ultrafiltration and microfiltration was investigated by perceiving membrane fouling as a dynamic process from non-equilibrium to equilibrium. Under the influence of the boundary condition at the initial section and cross flow, the equilibrium is first reached at the initial section of the crossflow filter and the front of the equilibrium region progresses with time toward the end of the filter. A mathematical model was developed to describe this dynamic process and a closed-form solution of the model was provided. With the model, the time-dependent flux and the time required to reach the steady state in a crossflow filtration can be easily determined. The fouling process under different conditions is simulated as an illustration and demonstration of the newly developed model.