Abstract Permeate flux, solute rejection, membrane fouling and permeate flux recovery in ultrafiltration (UF) acid bovine cheese whey was investigated for RC70PP (regenerated cellulose acetate), ETNA10PP (composite fluoro polymer) and GR73PP (polyethersulphone) commercial UF membranes (all 10 kDa nominal pore size). Pore morphology dominantly affected water permeability; active layer porosity affected intrinsic membrane resistance. Membrane roughness was the main factor in irreversible fouling resistance; the high roughness of ETNA10PP increased the rejection of the common whey proteins and lactose. A positive surface free energy of interaction of RC70PP resulted in comparable low fouling propensity regardless of the zeta-potential. The surface charge of two hydrophobic membranes (ETNA10PP and GR73PP) significantly affected fouling resistance. The recovery ratio of initial permeate flux after cleaning was directly related to the membrane hydrophilicity. The RC70PP membrane offered much better efficiency for the concentration of whey proteins due to its high antifouling performance despite its poor selectivity.

中文翻译：

---

通过超滤浓缩乳清蛋白：基于膜物理化学特性的工艺有效性比较评估

摘要 研究了 RC70PP（再生醋酸纤维素）、ETNA10PP（复合氟聚合物）和 GR73PP（聚醚砜）商用 UF 膜（均为 10 kDa）在超滤（UF）酸性牛干酪乳清中的渗透通量、溶质截留、膜污染和渗透通量回收公称孔径）。孔隙形态主要影响透水性；活性层孔隙率影响固有膜电阻。膜粗糙度是不可逆抗污性的主要因素；ETNA10PP 的高粗糙度增加了对常见乳清蛋白和乳糖的排斥。无论 zeta 电位如何，RC70PP 的正表面自由能相互作用导致相当低的结垢倾向。两种疏水膜（ETNA10PP 和 GR73PP）的表面电荷显着影响了抗污染性。清洗后初始渗透通量的回收率与膜亲水性直接相关。RC70PP 膜在浓缩乳清蛋白方面提供了更好的效率，尽管其选择性较差，但由于其高防污性能。