淀粉改性阳离子絮凝剂的制备及其絮凝性能研究

以淀粉─丙烯酰胺接枝共聚物为母体．加入阳离子化试剂，合成了阳离子型改性高分子絮凝剂FNQE。以高岭土悬浊液为处理体系，探讨了FNQE的絮凝性能，结果表明FNQE投加量4mg／L时即有理想的絮凝除浊效果，处理水上清液剩余浊度可降至3．ZNTU．其性能明显优于均聚型丙烯酰胺。对城市污水及饮食业污水的絮凝实验表明．投加量6～10mg／L时．FNQE对浊度、色度的去除率均在90％以上，COD去除率也在75％～80％以上。

Study of the application property of starch-modified cationic flocculant

Cationic natural polymer modified flocculant FNQE was synthesized by putting cationic additives into the parent fraction-starch-acrylamide graft copolymer. The flocculation properties of FNQE were studied in kaolinite containing suspension. The experimental results showed that FNQE had ideal turbidity removal efficiency and its performance was superior to that of homopolyacrylamide. The remaining turbidity in the treated water decreased to 3. 2NTU after 4 mg/L FNQE was added. The flocculation experiment with municipal wastewater and catering trade wastewater indicated that both the turbidity and c0lor removaI ratios were Iarger than 90%,and COD removal ratio was above 75 % ~80% when 6~ 10mg/L FNQE was added.