超滤与粉末活性炭吸附或明矾凝聚相结合，被证明对去除作为消毒副产物形成前体的有机物是有效的。DBP形成电位的去除率高达80%。这种去除主要是由于添加剂。无论原水浊度如何，渗透浊度始终较低。大肠菌群似乎被完全清除，渗透水中的总异养菌数持续较低。初步迹象表明，在本研究所经历的条件下，PAC和明矾在控制不可逆污垢方面可能不起重要作用。值得注意的是，添加如此高浓度的固体不会进一步抑制膜的性能- 到系统运行的四天时间。

Ultrafiltration combined with powdered activated carbon adsorption or alum coagulation proved to be effective for removal of organics which serve as precursors for disinfection byproduct formation. Removals of DBP formation potentials were as high as 80 percent. This removal is primarily due to the additives. Permeate turbidity was consistently low regardless of the raw water turbidity. Coliforms appeared to be completely removed, and total heterotroph counts in the permeate water were repeatedly low. Preliminary indications are that PAC and alum may not play an important role in controlling irreversible fouling for the conditions experienced during this study. It is significant to note that addition of such high solids concentrations did not further inhibit the performance of the membrane for the one- to four-day periods over which the system was operating.