沉淀—过滤工艺对水蚤去除效能的研究  

Research on Removal Efficiency of Daphnia with Sedimentation/Filtration Process

作　　者：苏洪涛 柯水洲[2] 刘丽君[3] 

机构地区：[1]长江航运规划设计院,湖北武汉430030 [2]湖南大学土木工程学院,湖南长沙410082 [3]深圳市水务<集团>有限公司水技术研究所,广东深圳518000

出　　处：《中国给水排水》2009年第11期76-78,82,共4页China Water & Wastewater

摘　　要：探讨了沉淀—过滤工艺对水蚤的去除效能。试验结果表明,水蚤的活性是影响沉淀池去除效果的关键因素,水蚤活体在沉淀池中可以自由活动而无法将其有效去除;水蚤死体则可以自然沉降,加之水蚤死体易和矾花结合而使其沉降速度加快,但由于水蚤密度和水的接近,在生产中仍然会有部分水蚤死体在其他因素的干扰下难以沉降。此外水蚤可穿透滤池,穿透个数与进水中的水蚤密度有关。滤池中可能会滋生水蚤,一旦出现该情况,砂滤出水中水蚤密度将难以控制,可在强化预氧化的基础上采取加氯反冲洗方式。The removal efficiency of daphnia with sedimentation/filtration process is discussed The activity of daphnia is the key factor affecting its removal efficiency in the sedimentation tank. The living bodies can not be effectively removed because they can move freely in the tank. Meanwhile the dead bodies settle automatically, they are prone to attach to flocs and their settling velocity is accelerated. However, because the density of daphnia bodies is similar to the density of water, dead daphnia bodies can not settle for other reasons as well. Daphnia can penetrate the filter, and the daphnia concentration in the effluent depends on the daphnia concentration in the influent. Moreover, daphnia may breed in the sand filter, which causes the daphnia concentration in the effluent to be out of control. The effective measure of chlorinated backwashing should be taken based on the enhanced pre-oxidation

关 键 词：水蚤 沉淀 过滤 

分 类 号：TU991.25[建筑科学—市政工程]