【摘要】 针对近年来太湖流域日益严重的藻类污染,以太湖采集的浓藻浆为实验原水,对照使用传统混凝剂,探讨了壳聚糖改性粉煤灰吸附性混凝剂对浓藻浆的藻水分离效果及去除藻类物质的机理。结果表明,改性粉煤灰吸附性混凝剂对浓藻浆的藻水分离效果良好。经投加量为2×10-4(质量分数)的改性粉煤灰吸附性混凝剂处理后,原藻浆产水浊度和叶绿素a的去除率均达到了99%以上。壳聚糖的吸附架桥作用及改性粉煤灰的吸附作用增强了对原藻浆的分离去除作用,对后续藻的脱水处理起到辅助作用。更多还原

【Abstract】 For the increasing serious water contamination by algae in Tai Lake,experiment was conducted to discuss algae/water separation effect of chitosan-modified fly ash adsorptive-coagulant(CMFAC) comparing with traditional coagulants,in which algae slurries collected from Tai Lake were used as experimental raw water.Removal mechanism of CMFAC was also studied.Results showed CMFAC had a good algae/water separation effect on concentrated algae slurry;with the dosage of 2×10-4(mass fraction)of CMFAC.Removal efficiency of turbidity and chlorophyll in treated water had both reached above 99%.Absorptien bridge effect of chitosan and adsorption of modified fly ash had strengthened the separation effect to the algae slurry,which was an important complement to the latter dewatering treatment for algae.更多还原