【摘要】 在苏州市姑苏区环城河边开展现场中试,研究了混凝沉淀/超滤组合工艺对河道水的处理效果。试验结果表明,组合工艺对河道水感官品质的提升效果显著,对浊度、色度的去除率分别为94. 16%～96. 25%、89. 69%～93. 86%,出水透明度能够达到2. 5 m以上。根据运行中跨膜压差的变化可知,组合工艺对于苏州河道水的最佳PAC投加量为20 mg/L。滤后水的颗粒粒径相比原水明显下降,小分子DOM的占比显著上升。通过三维荧光光谱可知,组合工艺对地表水中腐殖酸类物质具有良好的去除效果,这也是色度去除明显的主要原因。更多还原

【Abstract】 On-site pilot test was carried out for a river in Gusu District of Suzhou City. The treatment effect of a combined process of coagulation sedimentation and ultrafiltration on river water was studied. The combined process had a significant effect on the improvement of the water quality of the river. The removal efficiencies of turbidity and chromaticity were 94. 16%-96. 25% and 89. 69%-93. 86%,respectively,and the effluent transparency could reach more than 2. 5 m. According to the change of transmembrane pressure difference during operation,the optimal dosage of PAC for the treatment of river water was 20 mg/L. The size of the water particles after ultrafiltration was significantly lower than that of the raw water,and the proportion of small molecules of DOM increased significantly.The 3 D-EEM analysis showed that the combined process had a good removal effect on humic acids in surface water,and it was also the main reason for the obvious removal of chromaticity.更多还原