Abstract This article proposes two new concepts, adsorption and rejection accumulation and the membrane fouling efficiency per unit accumulation to quantitatively characterize the membrane fouling capacity of different single substances. The membrane fouling caused by bovine serum albumin (BSA), sucrose, glycerol triacetate, l-glutathione and maltodextrin on a polyethersulfone (PES) microfiltration membrane was studied. The real-time variations in filtrate concentration and transmembrane pressure were measured with an ultraviolet (UV) detector and pressure sensor during constant-flux filtration. The results showed that the PES membrane had rejection effects for the five substances. However, adsorption phenomena on the PES membrane were observed only for BSA and l-glutathione filtration. The membrane fouling capacity depended on the accumulation and fouling coefficient of the fouling component. The adsorption and rejection accumulation over 40 min followed the order of BSA (1441.39 µg·cm−2) > sucrose (908.53 µg·cm−2) > glycerol triacetate (290.29 µg·cm−2) > l-glutathione (145.18 µg·cm−2), while the membrane fouling efficiency per unit accumulation followed the order of l-glutathione (6.06 × 108 m−1·µg−1·cm2)>BSA (2.44 × 108 m−1·µg−1·cm2) > glycerol triacetate (2.08 × 108 m−1·µg−1·cm2) > sucrose (8.41 × 107m−1·µg−1·cm2). Based on these two factors, the membrane fouling was the most severe with BSA, followed by sucrose, l-glutathione and glycerol triacetate. The membrane fouling caused by maltodextrin was severe in the early stage and weakened in the later period due to the periodic formation and collapse of the maltodextrin cake layer on the membrane surface.

中文翻译：

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五种物质的PES微滤膜污染特性研究

摘要 本文提出吸附和截留累积和单位累积膜污染效率两个新概念来定量表征不同单一物质的膜污染能力。研究了由牛血清白蛋白 (BSA)、蔗糖、三乙酸甘油酯、L-谷胱甘肽和麦芽糊精在聚醚砜 (PES) 微滤膜上引起的膜污染。在恒通量过滤过程中，使用紫外 (UV) 检测器和压力传感器测量滤液浓度和跨膜压力的实时变化。结果表明PES膜对五种物质均具有阻隔作用。然而，仅在 BSA 和 l-谷胱甘肽过滤时观察到 PES 膜上的吸附现象。膜污染能力取决于污染成分的积累和污染系数。40 分钟内的吸附和排斥累积遵循 BSA (1441.39 µg·cm−2) > 蔗糖 (908.53 µg·cm−2) > 三乙酸甘油酯 (290.29 µg·cm−2) > l-谷胱甘肽 (145.18 µg· cm−2)，而每单位积累的膜污染效率遵循 l-谷胱甘肽 (6.06 × 108 m−1·µg−1·cm2)>BSA (2.44 × 108 m−1·µg−1·cm2) 的顺序> 三乙酸甘油酯 (2.08 × 108 m−1·µg−1·cm2) > 蔗糖 (8.41 × 107m−1·µg−1·cm2)。基于这两个因素，BSA 的膜污染最严重，其次是蔗糖、L-谷胱甘肽和三乙酸甘油酯。