【摘要】 通过对天津某水厂的中试试验,研究了气浮(DAF)和沉淀工艺对浊度、UV254、CODMn、TOC、THMFP、藻类的去除效果的影响,确定了适合华北地区典型水质的处理工艺。试验规模为5 m3/h。针对华北地区容易出现的夏季高温高藻、冬季低温低浊现象,分别对两种水质进行了混凝气浮和混凝沉淀试验,发现低温低浊期混凝气浮工艺对浊度的去除率比沉淀工艺平均高25%,而在其他时期只高出8.4%;高藻期气浮工艺对藻类的去除率平均比沉淀工艺高9.5%;有机物的去除规律在各个时期基本一致,气浮工艺对有机物的去除率比沉淀工艺平均高5%;气浮工艺对浊度、有机物、藻类的去除率分别为97%、40%、94%。中试试验证明气浮工艺适合对华北地区微污染水源水的处理,出水效果好于沉淀工艺。更多还原

【Abstract】 The turbidity,UV254,CODMn,TOC,THMFP and algal removals efficiency were studied by dissolved air flotation(DAF) and sedimentation process in a water treatment plant(WTP) of Tianjin,China.By the experiment,the suitable process to treat the typical north China source water and the rules of pollutants removal were determined.A pilot model with a capacity of 5 cubic meters per hour was constructed.During the treatment of the low temperature and low turbidity source water,the turbidity removal by DAF process was 25% higher than that by sedimentation process,and 8.4% higher in other periods.During the treatment of high temperature and algal bloom source water,the algal removal by DAF process was 9.5% higher than that by sedimentation process.The removal rule for organic mater was almost same in all periods,which was 5% higher by DAF process than that by sedimentation process.The removal for turbidity,organic matter,and algae can reach 97%,40% and 94% respectively.DAF process adapts to treat the micro-organic pollutants water in north China,and the treatment efficiency was better than sedimentation process.更多还原