STUDY ON THE SYNTHESIZE AND APPLICATION OF MODIFIED NATURAL HIGH POLYMER CATIONIC FLOCCULANT

摘要

Modified flocculant is synthesized through putting cationic additives into the graft copolymer of acrylamide and starch with the aim of broadening the application of natural starch. The results show that the percentage of graft copolymer was more than 60% when the contents of monomer and initiator were 7.108g/100ml and 0.30g/50ml, respectively, and the temperature was 30～40℃. It also showed that fLocculation had good turbidity removal efficiency while 14 ml / L fiocculation was added. The experiment with municipal wastewater indicated that the turbidity removal ratio was larger than 90% and COD removal rate was above 80.0%.