Abstract This work investigated the fouling of ion-exchange membranes during the electrodialysis of sweet and acid dairy whey. Fresh whey was used, rather than solutions made up in the laboratory, giving a unique perspective. While membrane fouling occurred in all experiments, the effects on system performance were limited. Reductions in the current during pure NaCl circulation fell to a minimum of 80% of the original value after 5 h of whey processing. The use of an alkaline concentrate resulted in the strongest increase in system resistance, but the mineral deposits formed appeared to detach readily, thereby reducing these effects. The use of an acidic concentrate gave significantly greater rates of lactic acid removal, which is important in industrial applications. A solution of HCl with a pH of 1.0 ± 0.15 was effective for in-situ cleaning of the mineral deposits. However, protein deposits were not readily removed using the recommended base cleaning formula of 3% NaCl at a pH of 9.2 ± 0.2.

中文翻译：

---

新鲜酸和甜乳清电渗析过程中离子交换膜的污染和原位清洗

摘要 这项工作研究了甜酸乳清电渗析过程中离子交换膜的污染。使用新鲜乳清，而不是实验室配制的溶液，提供了独特的视角。虽然在所有实验中都发生了膜污染，但对系统性能的影响是有限的。乳清加工 5 小时后，纯 NaCl 循环过程中电流的减少降至原始值的 80%。使用碱性浓缩液可最大程度地提高系统阻力，但形成的矿物沉积物似乎很容易分离，从而降低了这些影响。酸性浓缩物的使用显着提高了乳酸去除率，这在工业应用中很重要。pH 值为 1.0 ± 0 的 HCl 溶液。15 对矿床的原位清洁是有效的。然而，使用推荐的 3% NaCl 碱清洗配方，pH 值为 9.2 ± 0.2 时，蛋白质沉积物不易去除。