机械絮凝和网格絮凝处理低浊度水源水的性能对比中试研究  

Comparison of performances of mechanical flocculation and grid flocculation treating low turbidity source water by pilot-scale experiment

作　　者：谢磊[1] 董秉直[1] 曹达文[1] 王洪武[1] 卢伟 陈敏竹 张国荣 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]昆山市自来水集团有限公司,江苏苏州215300

出　　处：《工业用水与废水》2008年第5期73-76,共4页Industrial Water & Wastewater

摘　　要：针对某市第三水厂的三期工程建设，用中试规模试验来选择絮凝方式。试验结果表明，在相同的源水、相同加药量和相同的进水量的情况下，网格絮凝的沉淀效果优于机械絮凝。随着PAC投加量的增加，沉淀出水的浊度和大于2μm的颗粒数呈下降趋势。源水水质和投药量是影响沉淀池出水水质的最重要因素．最佳投药量的范围为21—28mg／L．In view of the third-stage project construction of the third waterworks of a city, pilot-scale experiment was used to select mode for the flocculation. The results of the test showed that, sedimentation effect with grid flocculation was better than that with mechanical flocculation under the same condition of source water, dosage and influent water quantity. With the increasing of the PAC dosage, the effluent turbidity after the sendimentation and the number of granules with diameter greater than 2 μm were on a downward tendency. Source water quality and flocculant dosage were indicated to be the most important factors affecting the effluent water quality from the sedimentation tank, the optimal dosage was within the range of 21 mg/L to 28 mg/L.

关 键 词：机械絮凝 网格絮凝 中试试验 低浊度水 

分 类 号：TU991.22[建筑科学—市政工程]