2000年5月，佛罗里达州马尔科岛的马尔科岛石灰软化水处理厂（LSWTP）从每天500万加仑（mgd）扩建至每天667万加仑（mgd），并增加了1.67 mgd浸入式膜超滤（UF）。马尔科岛LSWTP之前根据传统砂滤能力限制为5.0 mgd的产量。该设施处理马尔科湖的地表水。来自马尔科湖供水的原水被泵送9.5英里至马尔科岛LSWTP。原水水源含有较高的颜色（>40 cpu）、总有机碳（TOC）（>12 mg/L）、UV-254（0.181）、硬度（>350 mg/L CaCO3）和中等的总溶解固体（TDS）（>900 mg/L）。 在马尔科岛石灰软化工艺下游实施了1.67 mgd的全尺寸UF工艺，结果表明，平均过滤浊度为0.05 NTU，而平均砂滤出水浊度为0.1 NTU。包括9个参考文献、表格和图表。

In May 2000, the Marco Island Lime Softening Water Treatment Plant (LSWTP) of Marco Island, Florida, was expandedfrom 5.0 to 6.67 million gallons per day (mgd) with the addition of a 1.67 mgd immersed membrane ultrafiltration (UF). The Marco Island LSWTP was previously limited to 5.0 mgd of production based on conventional sand filter capacity. This facility provides treatment of surface water from the Marco Lakes. Raw water from the Marco Lakes supply is pumped 9.5 miles to the Marco Island LSWTP. The raw water source contains elevated color (>40 cpu), total organic carbon (TOC) (>12 mg/L), UV-254 (0.181), hardness (>350 mg/L as CaCO3), and moderate total dissolved solids (TDS) (>900 mg/L). Implementation of a full-scale 1.67 mgd UF process downstream of the Marco Island lime softening process demonstrated an average filteredturbidity of 0.05 NTU versus an average sand filtered finished water turbidity of 0.1 NTU. Includes 9 references, tables, figure.