生物硅藻土动态膜双层膜污染机理研究

项目名称： 生物硅藻土动态膜双层膜污染机理研究

项目编号： No.51208365

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 褚华强

作者单位： 同济大学

项目金额： 24万元

中文摘要： 生物硅藻土动态膜技术污染物处理效率高、过滤通量大、固液分离效果好、膜组件造价低，是一项很有应用前景的城镇污水深度处理技术，但目前国内外还没有对其膜污染机理进行系统的研究。本课题在自主研发的生物硅藻土动态膜反应装置基础上对生物硅藻土动态膜结构、压缩特性、交界面相互粘附作用等膜污染机理进行深入研究。通过对泥饼组分、分层形成结构等进行研究，明确生物硅藻土动态膜形态和结构特征；通过对泥饼孔隙率、颗粒变形、抗压缩能力等进行研究，解析生物硅藻土动态膜独特的压缩变形特性及其对膜污染的影响；通过分析动态膜和支撑基网的宏观粘附力及残留物质与基网之间的微观粘附力，阐释生物硅藻土动态膜-基网交界面相互粘附作用。结合以上研究结果，综合分析动态膜泥饼（第一层膜）与不锈钢基网（第二层膜）的双层膜污染机制。课题对揭示生物硅藻土动态膜双层膜污染机理、促进城镇污水深度处理技术发展等方面具有重要的学术价值和现实意义。

中文关键词： 动态膜；结构；压缩；交界面；双层膜污染

英文摘要： Bio-diatomite dynamic membrane (BDDM) is a very promising advanced municipal wastewater treatment technology due to its high pollutants removal efficiency, high filtration flux, excellent solid-liquid separation capacity and low membrane module cost. However, the researches of fouling mechanism of the BDDM have not been studied yet, which is the most important factor influencing its operation process. This research investigated the fouling mechanism of the BDDM, such as morphological structure, compressibility, and interface mutual adhesive effect, with a BDDM reactor at lab-scale in continuous-flow mode. The morphological structure of the BDDM will be analyzed according to the results of the components and hierarchical structure of the cake layer. Porosity, particle deformation and anti-compressibility of the cake layer are selected as the essential factors for interpretation of the special compressibility of the BDDM. The interface mutual adhesive effect between the BDDM cake layer and the underlying stainless steel support mesh is very important for analysis of the BDDM fouling mechanism, which will be focused on the macro adhesive force between the cake layer and the underlying support mesh, and the micro adhesive force between the residual matters and the underlying support mesh. Combined with the aforement

英文关键词： dynamic membrane；structure；compressibility；interface；double membrane fouling