SUNPeng,HUChun-sheng,JIAORu-yuan,et al.Identification and Analysis of Membrane Fouling with and without Lining in MBR[J].China Water & Wastewater,2024,40(17):9-15.
带衬及非带衬MBR膜污染物识别及膜污染差异解析
- Title:
- Identification and Analysis of Membrane Fouling with and without Lining in MBR
- 摘要:
- 带衬膜和非带衬膜作为膜生物反应器（MBR）中常用的两种膜类型，由于在结构和性能上的不同，其膜污染特征也存在一定的差异。针对应用于黄河上游典型污水厂MBR工艺的带衬膜和非带衬膜，通过扫描电镜、紫外可见吸收光谱、三维荧光光谱及傅里叶变换离子回旋共振质谱等方法对膜污染物进行系统识别，并对污染物种类和形态进行分析，以期获得不同类型膜的污染物质信息特征。结果表明，无论是无机还是有机污染物，两种类型膜中包含污染物质种类相差不大，但是两种膜对不同污染物的选择性具有较明显的差异。总体来说，带衬膜的抗污染能力较强，且带衬组膜丝的污染物主要集中在膜外表面上；对于金属离子含量较高的原水，带衬膜更容易截留金属离子形成无机金属离子膜污染物；两种膜污染物中的有机物类型分布基本一致，均对苯环类、蛋白质类具有较强的截留作用，但带衬膜的截留效果更好，且可以截留更多的微生物代谢产物、木质素等有毒及难降解物质，但由于这些物质主要通过膜孔过滤，易附着于膜孔内，因此需要有针对性地选择膜清洗方式，以保证持续的膜过滤效果。
- Abstract:
- As the two commonly used membrane types in membrane bioreactor (MBR), membranes with lining and without lining show differences in the membrane fouling characteristics due to the difference in structure and properties. In this study, the fouling in the membrane with and without lining which was used in typical wastewater treatment plants in the upper reaches of the Yellow River were identified by scanning electron microscopy, UV-visible absorption spectrum, three-dimensional fluorescence spectrum and Fourier transform ion cyclotron resonance. The types and forms of the fouling were analyzed to obtain the information characteristics of contaminants in different types of membranes. From the results, there was little difference in the types of pollutants contained in these two types of membranes no matter inorganic or organic pollutants, but the selectivity of the two membranes to different pollutants were significantly different. In general, anti-fouling ability of the membrane with lining was strong,and the pollutants of the membrane with lining were mainly concentrated on the outer surface. Specifically, the membrane with lining was easier to trap metal ions and form inorganic metal ion membrane fouling. Moreover, the distribution of organic matter types in the two membrane fouling were basically the same, with good performance of benzene rings and proteins removing, but the membrane with lining showed better interception performance. Besides, it had better effects on soluble microbial products and lignin removal which have more toxic or difficult to degrade in the regular treatment process, but these contaminant were easy to adhere to the membrane pore, and therefore, it was necessary to further select the membrane cleaning method to ensure the continuous membrane filtration effect.
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