高密度微气泡过滤快速分离城市景观水体藻类  

Fast Separation of Algae from Urban Landscape Water by High Density Microbubble Filtration

作　　者：徐竟成[1] 刘伟[1] 曹海花[1] 龚成晨[1] 魏巧玲[1] 

机构地区：[1]同济大学环境科学与工程学院长江水环境教育部重点实验室,上海200092

出　　处：《中国给水排水》2014年第7期14-17,共4页China Water & Wastewater

基　　金：国家科技支撑计划项目--科技部世博科技专项(2007BAK27B05)

摘　　要：针对城市景观水体夏秋季节易发生藻华现象,且藻类密度小,常规方法难以去除的特点,采用高密度微气泡层的表面吸附及过滤截留作用,实现细小藻类的迅速捕集和分离去除。试验结果表明:当气液混合泵压强为0.42 MPa时,系统产生的微气泡平均直径为72.0μm,数量密度达到2.1×108个/L;在水力负荷为5 m/h、溶气水回流比为130%的优化运行条件下,对叶绿素a的平均去除率达到93.4%。作为上海世博会期间景观水体藻类暴发的应急处理技术之一,可为城市景观水体的水质控制提供应用借鉴和技术参考。Algae blooms break out during summer and autumn seasons, and low density algae are difficult to remove from urban landscape water by traditional processes. The high density microbubble lay- er was adopted to achieve the fast collection and separation of small algae through surface adhesion and filtration. The results showed that the corresponding average diameter and the density of microbubbles were 72.0 μm and 2.1 ×10^8 ind./L, respectively, at a pressure of 0.42 MPa. Under the optimal oper- ating conditions （5 m/h hydraulic loading, 130% reflux ratio） As one of the emergency treatments for algae blooms during th reference and technical support for the , the removal rate of Chl-a was 93.4%. e Shanghai Expo, the technique provides quality control of the urban landscape water.

关 键 词：城市景观水体 除藻 高密度微气泡过滤 快速分离 

分 类 号：X703[环境科学与工程—环境工程]