出版日期：2023-05-28 00:00:00

著者：Chii-Dong Ho; J.W. Tu; J.W. Lim; W.C. Lai

著錄名稱、卷期、頁數：Membranes 13(6), 556

摘要：Membrane dialysis is one of the membrane contactors applied to wastewater treatment. The dialysis rate of a traditional dialyzer module is restricted because the solutes transport through the membrane only by diffusion, in which the mass-transfer driving force across the membrane is the concentration gradient between the retentate and dialysate phases. A two-dimensional mathematical model of the concentric tubular dialysis-and-ultrafiltration module was developed theoretically in this study. The simulated results show that the dialysis rate improvement was significantly improved through implementing the ultrafiltration effect by introducing a trans-membrane pressure during the membrane dialysis process. The velocity profiles of the retentate and dialysate phases in the dialysis-and-ultrafiltration system were derived and expressed in terms of the stream function, which was solved numerically by the Crank–Nicolson method. A maximum dialysis rate improvement of up to twice that of the pure dialysis system (𝑉𝑤=0 ) was obtained by employing a dialysis system with an ultrafiltration rate of 𝑉𝑤=2 mL/min and a constant membrane sieving coefficient of 𝜃=1 . The influences of the concentric tubular radius, ultrafiltration fluxes and membrane sieve factor on the outlet retentate concentration and mass transfer rate are also illustrated.

關鍵字：dialysis;tubular dialyzer;ultrafiltration;mass transfer;separation efficiency

語言：en

ISSN：2077-0375

期刊性質：國外

收錄於：SCI EI

審稿制度：是

國別：CHE

出版型式：電子版