摘要
微滤膜技术因过滤精度高、滤速快、操作压力低等特点,在高品质饮用水生产中作为纳滤的预处理工艺逐渐得到应用,但膜污染一直是影响其运行稳定性及使用寿命的问题之一。本文基于生产性微滤-纳滤双膜法饮用水处理工艺试验,通过特征污染物截留能力与膜解剖表征分析,对微滤膜的膜污染机制进行了研究。结果表明:运行初期,膜污染主要为微滤膜的机械截留作用以及驱动压力作用,导致原水中的颗粒性污染物在膜表面发生中间/完全孔堵,形成松散堆积的滤饼层;后期因滤饼层的形成促进了有机污染、生物污染以及结垢性污染的形成与发展,最终造成了致密性膜污染的发生。研究成果可为微滤膜处理单元的膜污染控制提供技术支撑。
Microfiltration technology has been widely used in the advanced treatment of drinking water,but membrane fouling is an urgent concern that affects the operational stability and service life of MF.Based on the full-scale MF-Nanofiltration dual-membrane drinking water treatment process,the membrane fouling mechanism of the MF pretreatment unit was investigated through the characteristic contaminant retention capacity and membrane autopsy analysis.The results show that:In the early operation stage,membrane fouling was dominated by the mechanical retention effect of MF and the driving pressure,resulting in intermediate/complete pore plugging of particulate contaminants in the raw water on the membrane surface and the formation of loosely accumulated cake layer,the formation of the cake layer promotes the formation and development of organic fouling,biological fouling and scaling fouling,and ultimately resulted in a dense cake layer.The results can provide technical support for the membrane fouling control of microfiltration membrane treatment unit.
作者
刘子惠
程丽华
LIU Zihui;CHENG Lihua(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China)
出处
《水处理技术》
北大核心
2025年第2期110-115,共6页
Technology of Water Treatment
基金
山东省自然科学基金(ZR2021QE234)
国家重点研发计划项目(2017YFC0403404)。
关键词
饮用水
微滤
膜解剖
膜污染
膜清洗
drinking water treatment
microfiltration
autopsy of membrane
membrane fouling
membrane clean
