Effect of feed spacer thickness on the fouling behavior in reverse osmosis process - A pilot scale study

被引：33

作者：

Park, Hyung-Gyu ^{[1
]}

Cho, Sung-Geun ^{[2
]}

Kim, Kang-Jin ^{[2
]}

Kwon, Young-Nam ^{[1
]}

机构：

[1] UNIST, Sch Urban & Environm Engn, Ulsan 689798, South Korea

[2] Toeray Chem Korea, Filter Tech Support Team, Gumi 730906, Kyungbuk, South Korea

来源：

DESALINATION | 2016年 / 379卷

关键词：

Polyamide RO; Feed spacer; Fouling; Differential pressure; SPIRAL WOUND MODULES; LADDER-TYPE SPACERS; MASS-TRANSFER; SURFACE MODIFICATION; COMPOSITE MEMBRANES; POLYAMIDE MEMBRANE; FILLED CHANNELS; RO MEMBRANES; HYDRODYNAMICS; CHLORINATION;

D O I：

10.1016/j.desal.2015.11.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The performance deterioration of RO membrane processes caused by the accumulation of rejected solutes on membrane surface is an inevitable phenomenon in membrane processes. The feed spacer in spiral wound reverse osmosis (RO) membrane modules can provide the structural support to keep feed channel open and also allow turbulent flow to mitigate solute concentration build-up at the vicinity of membrane surface. The objective of this study was to investigate the effect of feed spacer thickness on both membrane fouling behavior and cleaning efficiency in a pilot test during a 659 h operation. Furthermore, fouling load distribution was studied by measuring normalized differential pressure of individual elements in pressure vessels. Foulant analysis according to feed spacer thickness was also conducted to compare fouling propensities. This study showed that a thicker feed spacer could reduce membrane fouling and subsequently decrease membrane cleaning frequency and allow an even fouling load distribution along the modules installed in a pressure vessel. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：155 / 163

页数：9

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