聚丙烯酰胺对氨水中有机悬浮物絮凝作用的研究

对氨水中的有机悬浮物采用聚丙烯酰胺(PAM)进行絮凝。通过絮团特征、清液特征、絮团聚集程度以及氨水中絮团体积的变化率同絮凝时间的关系,比较了不同添加量、不同种类的PAM絮凝效果。结果表明,采用阴离子型聚丙烯酰胺和阳离子型聚丙烯酰胺相结合的絮凝方式,能较好地絮凝氨水中的有机悬浮物。较好的絮凝方式是:在140 r/m in搅拌中,往氨水中加入分子量为1100万、浓度为1‰的阴离子型聚丙烯酰胺15 mL/L,搅拌1 m in;调转速为60 r/m in,加入离子度为20%~25%、浓度为1‰的阳离子型聚丙烯酰胺5 mL/L,搅拌5 m in,静止1 h。

Study on the flocculation of organic suspended matter in ammonia water with polyacrylamide

The flocculation effect is studied with different addition amount and different kinds of polyacrylamide flocculation organic suspended matter in ammonia water.The various flocculation effect is compared through floccule characterization and serum characterization and floccule aggregated extent and the relation curve of floccule volume change rate in ammonia water with flocculation time.The better flocculation way is that 15 mL/L anionic polyacrylamide(molecular weight is 1100 myriad,concentration is 1‰) is added in ammonia water,rotated for 1 min when rotating speed is 140 r/min,and 5 mL/L cationic polyacrylamide(ion activity is 20%～25%,concentration is 1‰) is added in ammonia water,rotated for 5 min when rotating speed is 60 r/min,standed for 1 h.The result showed that the flocculation way of anionic polyacrylamide combined with cationic polyacrylamide could flocculate organic suspended matter in ammonia water better.