膜科学与技术

MBR与NF联用净化微污染水源水研究

作者：张泉¹，韩如冰¹，董文艺¹，郭曦¹，刘磊³

单位： 1.哈尔滨工业大学深圳研究生院，深圳 518055；2.哈尔滨工业大学市政与环境工程学院，哈尔滨150090；3.深圳市水质检测中心，深圳 518055

关键词：纳滤膜；MBR；膜污染；产水率

出版年,卷(期):页码： 2015,35(2):87-92

摘要：

本研究对纳滤膜在不同产水率条件下的净水性能和膜通量衰减过程，以及纳滤膜在产水率90%条件下的运行特性进行了分析。采用MBR作为预处理与纳滤膜联用，考察联用工艺对水中氨氮和有机物的去除效果，以及MBR膜和纳滤膜的污染情况。结果表明，相比于额定工况，纳滤膜在90%产水率条件下运行，对有机物的去除率和脱盐率分别降低4%和3.5%，仍具有优越的净水性能；膜通量衰减速度增加17%。研究同时表明降低纳滤膜进水中有机物的浓度能够有效缓解纳滤膜的污染过程，使纳滤膜能够在90%产水率条件下保持较高的通量。MBR与纳滤膜联用对氨氮和TOC表现出良好的去除效果，在进水浓度为1.5mg/L、3.5mg/L时，出水分别降低到0.4mg/L、0.2mg/L。MBR通过去除水中的颗粒物和有机物，有效的缓解了纳滤膜的污染过程，在60天的运行中纳滤膜通量仅下降24.7%，但MBR膜TMP增长较快，试验中共进行了6次膜清洗。

The water purification efficiency and flux attenuation of nanofiltration working in different permeate ratios were contrasted and performance of NF under 90% permeate ratio was investigated. MBR was employed to combine NF for micro pollutant water resource treatment. The ammonia-N and TOC removal capability of the hybrid system was studied. Furthermore, membrane fouling processes of both UF membrane in MBR and NF membrane were investigated. Since the permeate ratio of NF enhanced from 15% to 90%, TOC removal rate and the desalination rate declined by 4% and 3.5%, respectively, when NF remained effective rejection of pollutants. However, NF flux decline by 17%. The result indicated that reduction of TOC concentration in NF influent could slower the fouling process of NF. The MBR-NF system showed high pollutants removal efficiency even that flux ratio of NF was as high as 90%. The concentration of ammonia-N and TOC reduced from 1.5mg/L, 3.5mg/L to 0.4mg/L and 0.2mg/L, respectively. Due to the high removal of particulate and organic matters in MBR, NF fouling process was obviously relieved that 24.7% of flux decline was observed during 60 days operation.

张泉（1984-），男，黑龙江省哈尔滨市人，博士生，从事饮用水深度处理技术研究。

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