德克萨斯州谢尔曼市目前每天供水1000万加仑（mgd） 处理厂（WTP）处理德克索马湖的微咸水。这种植物使用 电渗析后的常规处理（絮凝/沉淀/过滤） 反转（EDR）去除溶解固体。由于即将出台的法规和不断增长的 由于水资源需求，谢尔曼市正在将德克索马湖地表水处理厂扩建5 mgd 成品水处理能力。微滤/超滤（MF/UF），然后反向过滤 渗透（RO）脱矿被选为满足上述要求的最佳表观技术 城市运营和水质目标。 处理挑战包括盐度降低、浊度控制、总有机碳（TOC） 减少、消除异味和异味，去除病原体和/或 来自地表水供应源的灭活。此外，膜经过处理 将混合产品水，且必须与现有供水兼容 以及治疗设施。 进行了一项初步研究，以评估计划治疗满足以下要求的能力: 城市的水质目标。如上所述，计划处理包括双膜 工艺流程:MF/UF用于去除悬浮固体和病原体，然后RO用于去除溶解固体 固体和TOC降低。来自三家供应商的MF/UF飞行员（爱奥尼斯诺瑞特X-flow，Pall Microza和Zenon ZeeWeed）之后是两个Osmonics反渗透试验装置。MF/UF 供应商被要求回收其反洗水，以实现99%的总体系统恢复 百分比来自MF/UF装置的产品水被合并并输送至两个单独的装置 反渗透装置，从而可以改变具有不同特性的膜的性能 相比。两个反渗透装置都使用了阻垢剂。将RO性能与 制造商的预测。包括桌子。

The City of Sherman, Texas, currently operates a 10-million gallon per day (mgd) water treatment plant (WTP) to treat brackish water from Lake Texoma. The plant uses conventional treatment (flocculation/sedimentation/filtration) followed by electrodialysis reversal (EDR) to remove dissolved solids. As a result of upcoming regulations and growing water demands, the City of Sherman is expanding its Lake Texoma Surface WTP by 5 mgd of finished water capacity. Microfiltration/ultrafiltration (MF/UF) followed by reverse osmosis (RO) demineralization was selected as the best apparent technology to meet the City's operational and water quality goals. Treatment challenges include salinity reduction, turbidity control, total organic carbon (TOC) reduction, elimination of objectionable tastes and odors, and pathogen removal and/or inactivation from the surface water supply sources. Furthermore, the membrane-treated product water will be blended and must be compatible with water from the existing supply and treatment facilities. A pilot study was conducted to evaluate the ability of the planned treatment to meet the City's water quality objectives. As mentioned, planned treatment includes dual-membrane processes, MF/UF for suspended solids and pathogen removal, followed by RO for dissolved solids and TOC reduction. MF/UF pilots from three vendors (Ionics Norit X-flow, Pall Microza, and Zenon ZeeWeed) were followed by two Osmonics RO pilot units. The MF/UF vendors were required to recycle their backwash to achieve an overall system recovery of 99 percent. The product water from the MF/UF units was combined and fed to the two separate RO units so that the performance of membranes with varying characteristics could be compared. A scale inhibitor was used in both RO units. RO performance was compared to manufacturer's projections. Includes tables.