污染聚偏氟乙烯中空纤维超滤膜的超声清洗

<P>GUO Wei; JIN Wei; WANG Bin; LV Xiaoping</P>

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污染聚偏氟乙烯中空纤维超滤膜的超声清洗

更新时间：2025-12-10

- 污染聚偏氟乙烯中空纤维超滤膜的超声清洗
- CIESC Journal Issue 12, (2006)
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- Online First：25 December 2006，
  
  Published：25 December 2006
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GUO Wei, JIN Wei, WANG Bin, et al. 污染聚偏氟乙烯中空纤维超滤膜的超声清洗[J]. CIESC Journal, 2006, (12).
DOI：

GUO Wei, JIN Wei, WANG Bin, et al. 污染聚偏氟乙烯中空纤维超滤膜的超声清洗[J]. CIESC Journal, 2006, (12).
DOI：

摘要

中空纤维超滤膜污染和清洗影响膜处理废水工艺的经济性及可运行性.研究了平板浸没式超声处理器（40 kHz）与2000 mg·L-1柠檬酸清洗剂对中石化某水处理厂污染聚偏氟乙烯超滤膜的清洗效果.利用自定义的除垢率和扫描电镜对清洗结果进行表征并用过滤通量来验证.证明超声对超滤膜的清洗效果显著.单根膜清洗除垢率比不加超声时提高了25%，达到80%左右，且没有破坏膜的表面和结构.得到本批污染膜及自制污染膜组件的优化清洗工艺及超声参数为：频率40 kHz、声强2200 W·m-2、超声处理时间30 min.未使用反向冲清洗，仅切向气流结合超声清洗膜面，清洗后的通量从原来污染组件的0.0368 cm3·cm-2·min-1增加到0.1254 cm3·cm-2·min-1，恢复到相当于新膜初始通量的72.5%，通量增加率达到241%.进一步证明了超声清洗膜的可行性和有效性.

Abstract

Hollow fibre ultrafiltration membrane is frequently employed in the water treatment processes.However

the fouling of ultrafiltration membrane significantly affects the economics of the process.In this study the fouled polyvinylidenefluoride ultrafiltration membrane and its module were cleaned by flat ultrasonic treatment with 2000 mg·L-1 citric acid.The cleaning results were determined by a cleaning ratio defined by the authors and SEM

and also validated by membrane flux.Ultrasound was shown to be beneficial to cleaning and the cleaning ratio was 80% with no damage of membrane and was 25% more than that without ultrasonic treatment.The optimal ultrasonic treatment parameters were: frequency 40 kHz

sound intensity 2200 W·m-2

treatment time 30 min.For the fouled module

the flux increased from 0.0368 cm3·cm-2·min-1 to 0.1254 cm3·cm-2·min-1

i.e.

the flux recovery was 72.5% of the new membrane without back purge and the flux was increased to 241% of the initial flux of fouled membrane.

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