Flemmers Composite Model for Ultrafiltration Process

The composite model and concentration polarizationgel layer model were com-pared,Their parameters were obtained on the basis of the experimental data of ultrafiltratingerythromycin fermentation broth filtrate,using both the innerand outer-pressured hollow-fiber equipment.The results showed that the composite model was more advantageous andcoincided with the experimental data better by taking account of the entire membrane sur-hce,including the portion before the formation of the gel layer.