为水质和运维问题提供清晰、量化的答案 与传统的海水反渗透（SWRO）和双通道纳滤工艺相关，长滩水利部（LBWD） 制定了一个积极的研究计划，建立了一个 使用全尺寸设备的“原型”研究设施每天都有加仑的水。 本文介绍了LBWD对SWRO的初步评估和初步评估 与双通道纳滤的比较。 原型设施的建造理念是提供无偏见的 积极的工艺和水质研究。该系统的工艺流程示意图 本文提供了原型装置。原型机采用了加压技术 作为预处理过程的微滤（MF）膜。MF单元是 以每小时约35加仑的流量，在由外而内的配置下运行 每天平方英尺（gfd）。将MF单元的操作扩展到每个 “就地清洗”，在反洗过程中添加氯气。亚硫酸氢钠是 持续添加到MF滤液中，以熄灭剩余的余氯 在反冲洗过程之后。MF废水收集在主MF滤液中 然后将其平均分为两列。这确保了 SWRO和双通道NF的预处理水质相同。 目前，1号生产线的设立是为了测试LBWD正在申请的双通道纳滤专利 （NF²）过程。Dow Filmtec NF90膜被选为通过1和 Saehan NE90海水膜被选为pass 2。2号列车正在运行 配置为评估传统单通道SWRO，其中 选择SWC3+膜作为反渗透膜。相同能量 两台SWRO上都使用了回收合并（ERI）压力交换器 和NF²训练，以允许“苹果对苹果”比较这些数据的多少 设备有助于降低能耗。 渗透液和盐水都来自 火车被重新组合，以重建未经处理的海水，然后排放回原水 进入海洋。这就允许进行积极的研究，而不存在风险 危及公共供水。每个过程的电源监测器（MF、， SWRO和NF²）被合并，以准确确定实际电力成本。包括10个参考文献、表格和图表。

To provide clear and quantifiable answers to water quality and O&M questions related to the traditional seawater reverse osmosis (SWRO) versus dual-pass nanofiltration process, the Long Beach Water Department (LBWD) has formulated an aggressive research program and constructed a 300,000 gallons per day permeate "Prototype" research facility using full-scale equipment. This paper presents LBWD's preliminary evaluation of SWRO and initial comparisons against dual-pass nanofiltration. The prototype facility was constructed with the mindset to provide unbiased aggressive process and water quality research. A process flow schematic of the prototype facility is provided in the paper. The prototype utilizes pressurized microfiltration (MF) membranes as the pretreatment process. The MF unit is operated in an outside-in configuration at a flux of approximately 35 gallons per square foot per day (gfd). To extend the operation of the MF unit between each "clean-in-place", chlorine is added in the backwash process. Sodium bisulfite is continuously added to the MF filtrate to quench any residual chlorine remaining after the backwash process. The MF effluent is collected in a main MF filtrate tank, where it is then divided equally into two trains. This ensures that the pretreatment water quality is identical for both SWRO and dual-pass NF. Currently, train 1 is set up to test LBWD's patent-pending two-pass nanofiltration (NF²) process. Dow Filmtec NF90 membranes were selected for pass 1 and the Saehan NE90 seawater membranes were selected for pass 2. Train 2 is configured to evaluate traditional single-pass SWRO, where Hydranautics SWC3+ membranes were selected as the RO membrane. Identical Energy Recovery Incorporated (ERI) pressure exchangers are used on both the SWRO and NF² trains to allow for an "apples to apples" comparison on how much these devices aid in lowering energy consumption. The permeate and brine from both trains are recombined to reconstitute raw seawater and then discharged back into the ocean. This allows for aggressive research without the risk of endangering the public water supply. Power monitors for each process (MF, SWRO, and NF²) are incorporated to accurately determine actual power costs. Includes 10 references, tables, figures.