在该工厂中，循环渗透水通过一个简单的喷射器从20 psig的渗透系统压力泵送至30-40 psig的典型给水泵吸入压力，喷射器由来自给水泵排放口的侧流驱动。因此，尽管可以使用小型电机驱动的泵，但给水泵提供泵送能量。启动时，该厂在进料pH值为5.7时，铁的总截留率约为90%，产品的总回收率为80%。根据中试结果和NF70膜的其他经验，在运行的前几个月，总铁截留率预计将增加到92%左右。

In this plant, recycled permeate is pumped from a permeate system pressure of 20 psig up to a typical feed pump suction pressure of 30- 40 psig by a simple eductor driven by a side-stream taken from the feed pump discharge. Thus, the feed pump supplies the pumping energy although a small motor-driven pump could be used instead. At startup, the plant achieved an overall iron rejection of about 90% at a feed pH of 5.7 and 80% overall product recovery. Based on pilot test results and other experience with the NF70 membrane, overall iron rejection is expected to increase to about 92% during the first few months of operation.