膜科学与技术

浸没管式MBR特性及其膜过程

作者：朱春瓶，张春芳，白云翔，孙余凭，顾瑾

单位：朱春瓶（1990-），女，硕士，主要研究方向，膜分离

关键词：管式MBR；污染层阻力；组件结构；边界层

出版年,卷(期):页码： 2015,35(5):24-29

摘要：

从流体力学角度，研究管式MBR膜过滤过程特性。结果表明，单管膜的圆柱形形体特征造成边界层的变化，湍动增强，较一般的平板面膜更有利于抑制膜面污染层的形成；而组件内膜管间的边界层相互干扰效应改变了单管膜的边界层形态，扰动加剧，有效弱化了污染层的形成。管式MBR正三角形错排结构由于其规整的几何形状能获得较好的水力学特性，膜通量高；等腰错排结构次之，顺排结构表现相对弱些；同时，适当提高曝气强度能增强气液混合流在膜管间的交互作用，显著提高膜通量。

From the view of fluid mechanics, the characteristics of tubular MBR membrane filtration process were studied. Results showed that the cylindrical shape characteristics of the single tube membrane caused the change of the boundary layer and enhanced the turbulence compared to the general flat membrane surface, it is more conductive to curb the formation of pollution layer on the membrane surface. The mutual interference effect of boundary layer between membrane tubes in the module changed the form of the boundary layer of the single tube membrane, intensified the disturbance, effectively reduced the pollution layer formation. Tubular MBR of triangular staggered structure due to its neat geometric shapes can achieve good hydraulic characteristics and high membrane flux, the isosceles staggered structure is next, in-line structure is relatively weak; appropriately increasing aeration strength can enhance the interaction of the gas-liquid mixed flow between the membrane tubes.

朱春瓶（1990-），女，硕士，主要研究方向，膜分离

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