高取代度阳离子淀粉在生活污水处理中的应用

Application of cationic startch with high substitute degree to domestic sewage treatment

采用实验室研制的高取代度阳离子淀粉作为絮凝剂对生活污水进行处理,获得良好的效果。通过实验探讨了高取代度阳离子淀粉的加入量、废水的pH及絮凝时间对絮凝效果的影响,确定了高取代度阳离子淀粉处理生活污水的最佳条件。同时测定了处理前后的生活污水的CODCr值,发现高取代度阳离子淀粉能大幅度地降低生活污水的CODCr值。

Cationic starch with high substitute degree has been used to treat domestic sewage as the flocculant.Its effect is satisfactory.The feeding amount of cationic starch,pH value and flocculating time have been discussed.The optimum conditions are gained:the cationic start is0.07%,pH is5;and the flocculating time is48h.At the same time ,the cationic startch can make the COD Cr of the domestic sewage decrease to a great extent ,from404.1mg /L to201.8mg /L.So are the optimum conditions of domestic sewage determined.