废水处理厂的废水含有5至15 mg/L的溶解有机碳（DOC），通过生物处理去除未处理废水中的大部分有机物。本研究的目的是对剩余的大量有机物及其成分进行表征，并将其从二次废水中去除。使用实验室规模的过滤池测试不同的微滤和超滤膜。主要问题是出水有机物（EfOM）对膜的污染，这阻碍了高效运行。使用非离子大孔树脂（Amberlite XAD 8和XAD 4）从科罗拉多州博尔德的污水处理厂分离出水有机物。获得的分离物用于确定对污垢贡献最大的DOC分数。 实验表明，在搅拌槽试验中，通量在一到两个小时内显著下降。在输送到膜表面的总DOC中，只有一小部分会形成污染层。有趣的是，获得的渗透液第二次通过膜仍然会导致第二阶段的通量下降和污染，尽管程度较小。尺寸排阻色谱显示，主要是蛋白质和多糖，这可归因于残余有机物的胶体部分，造成最严重的污染。包括16个参考文献、表格和图表。

The effluent of wastewater treatment plants contains between 5 and 15 mg/L of dissolved organic carbon (DOC), with biological treatment removing a majority of the organic matter present in untreated wastewater. Characterizing this remaining bulk organic matter and its constituents, and removing them from secondary effluents was the aim of this study. A bench-scale filtration cell was used for testing different microfiltration and ultrafiltration membranes. The main problem is the fouling of the membranes by effluent organic matter (EfOM) which prevents an efficient operation. Isolation of effluent organic matter from the WWTP in Boulder, Colorado, was done with non-ionic macroporous resins (Amberlite XAD 8 and XAD 4). The obtained isolates were used to identify the DOC fraction that contributes most to the fouling. Experiments showed significant flux decline over a period of one to two hours in stirred cell tests. Of the total DOC delivered to the membrane surface, only a small percentage contributes to the fouling layer. Interestingly, a second passage of the obtained permeate through the membrane still induces flux decline in a second stage and fouling, although to a lesser extent. Size exclusion chromatography revealed that mainly proteins and polysaccharides, which can be attributed to the colloidal fraction of residual organic matter, cause the most severe fouling. Includes 16 references, tables, figures.