Abstract Pulse Flow Reverse Osmosis (PFRO) technology is a new, innovative method for operating Reverse Osmosis water reuse systems that enables high recovery, high flux and Chloramine-free operation. PFRO™ constantly changes the osmotic and hydraulic conditions, thus greatly diminishing biofouling and scaling. PFRO technology was demonstrated in a municipal wastewater (WW) treatment facility at Pismo Beach, CA, from October 2018 until October 2019, using secondary effluent of a municipal wastewater plant as source water. The unit operated with an average flux of 16.5 gfd (28 LMH), which is 50% higher than the standard design of 11 gfd (18–19 LMH). Specific flux was 0.12 GFD/PSI - about 25% higher than most well-operated wastewater reuse facilities that operate at the same recovery with specific flux of 0.09–0.1 gfd/psi. The unit operated at 86% recovery in a single RO stage. No chloramine was dosed, thus no disinfection byproducts were formed. The chloramine-free operation generates permeate with an Ultraviolet Transparency (UVT) value of about 100%, thereby saving 30–40% on Capital (CAPEX) and Operational Expenditure (OPEX) in the final Ultra Violet/Advanced Oxidation Process (UV/AOP) stage. The overall water cost in this process is 14–28% lower than a similar standard Fully Advanced Treatment (FAT) water reuse process.

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脉冲流反渗透 - 用于废水和微咸水应用的新型反渗透技术

摘要 脉冲流反渗透 (PFRO) 技术是一种用于操作反渗透水回用系统的创新方法，可实现高回收率、高通量和无氯胺操作。PFRO™ 不断改变渗透和水力条件，从而大大减少生物污垢和结垢。PFRO 技术于 2018 年 10 月至 2019 年 10 月在加利福尼亚州皮斯摩海滩的市政污水 (WW) 处理设施中进行了演示，使用市政污水厂的二次出水作为源水。该装置以 16.5 gfd (28 LMH) 的平均通量运行，比 11 gfd (18-19 LMH) 的标准设计高 50%。比通量为 0.12 GFD/PSI - 比大多数运行良好的废水回用设施高约 25%，这些设施以相同的回收率运行，比通量为 0.09–0.1 gfd/psi。该装置在单个 RO 阶段以 86% 的回收率运行。没有加入氯胺，因此没有形成消毒副产物。无氯胺操作产生的渗透物的紫外线透明度 (UVT) 值约为 100%，从而在最终的紫外线/高级氧化工艺 (UV/AOP) 中节省 30–40% 的资本 (CAPEX) 和运营支出 (OPEX) ） 阶段。该过程的总用水成本比类似的标准完全高级处理 (FAT) 水再利用过程低 14-28%。从而在最后的紫外线/高级氧化工艺 (UV/AOP) 阶段节省 30-40% 的资本 (CAPEX) 和运营支出 (OPEX)。该过程的总用水成本比类似的标准完全高级处理 (FAT) 水再利用过程低 14-28%。从而在最后的紫外线/高级氧化工艺 (UV/AOP) 阶段节省 30-40% 的资本 (CAPEX) 和运营支出 (OPEX)。该过程的总用水成本比类似的标准完全高级处理 (FAT) 水再利用过程低 14-28%。