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Independent testing of commercially available, high-permeability SWRO membranes for reduced total water cost

机译:对市售的高渗透性SWRO膜进行独立测试以降低总水费

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摘要

Energy remains the major operating expense when producing desalted water by seawater reverse osmosis (SWRO). Recent advances in membrane materials and highly efficient energy recovery devices have drastically reduced the energy required to desalinate seawater over a wide range of system capacities. This study tests the performance of novel, commercially available, high-permeability membranes (including nanocomposite membranes) over an extended period of time. Tests were carried out utilizing a 125m~3/day SWRO system with independently verified continuous power monitoring. The desalination subsystem utilizes a staged membrane configuration and a low flux-low recovery design to minimize the overall energy consumption, reduce potential fouling, and reduce membrane cleaning. The specific power required to desalinate water to produce potable water having total dissolved solids below 400mg/L was consistently below 2.0kWh/m~3 for feedwater temperatures above 20 ℃ using commercially available high pressure pumps and energy recovery devices.
机译:在通过海水反渗透(SWRO)生产淡水时,能源仍然是主要的运营支出。膜材料和高效能量回收装置的最新进展已大大降低了在各种系统容量范围内使海水淡化所需的能量。这项研究测试了新型,市售高渗透膜(包括纳米复合膜)在较长时间内的性能。测试是使用125m〜3 / day SWRO系统进行的,具有独立验证的连续功率监控功能。脱盐子系统利用分段的膜配置和低通量-低回收率设计来最大程度地降低总能耗,减少潜在的结垢并减少膜清洁。使用市售高压泵和能量回收装置,当进水温度高于20℃时,对水进行脱盐以生产总溶解固体低于400mg / L所需的比功率始终低于2.0kWh / m〜3。

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