【摘要】 试验分别选用聚合铁(PFS)与聚合铝(PAC)处理地表原水,以聚二甲基二烯丙基氯化铵(PDMDAAC)为助凝剂,考察PDMDAAC助凝后絮体形态变化,絮体图像用显微摄像系统分析,计算絮凝体的分形维数。结果表明:在郑州市东风渠原水处理中,投加无机絮凝剂35 mg/L、PDMDAAC 1.0 mL/L,PDMDAAC助凝效果显著,浊度明显降低,絮体密实;协同PFS处理后絮体的一维分形维数由1.099 6增大到1.140 4,二维分形维数由1.520 9增大到1.544 3;协同PAC处理前后絮体的一维分形维数由1.038 0增大到1.046 8,二维分形维数由1.303 2增大到1.394 6;絮体大小和密实度可以从形态学方面进行量化,一维、二维分形维数均可以,二维分形维数更切合实际。更多还原

【Abstract】 The tests used PFS and PAC to treat surface raw water when poly diallyl dimethyl ammonium chloride(PDMDAAC) as coagulant aid.Electron microscope was used to observe flocs morphology and investigate PDMDAAC coagulation aid morphological changes.Microscope camera system was used to analyze the floc images,then to calculate floc fractal dimension.The results show that PDMDAAC in dealing with the surface raw water of Dongfeng River Zhengzhou plays a good coagulation aid effect,when inorganic flocculants is 35 mg/L,and PDMDAAC is 1.0 mL/L.One-fractal-dimension of PFS and PDMDAAC united PFS are 1.099 6 and 1.140 4,two-fractal-dimension of PFS and PDMDAAC united PFS are 1.520 9 and 1.544 3;and one-fractal-dimension of PAC and PDMDAAC united PAC are 1.038 0 and 1.046 8,two-fractal-dimension of PAC and PDMDAAC united PAC are 1.303 2 and 1.394 6.Floc fractal dimension changes can reflect the flocculation level and treatment effect,and two-fractal-dimension is better.更多还原