阳离子聚丙烯酰胺（PAM）改善污泥脱水性能的研究

摘要

通过对污泥含水率的测定和滤液蛋白质的测定,考察了阳离子聚丙烯酰胺（PAM）对污泥脱水性能的影响。结果表明,PAM能够改善污泥的脱水性能,最佳的投加量为0.96mg/g,污泥的含水率73.38%。通过激光粒度分析研究PAM对污泥的作用机理,发现投加PAM之后,污泥的絮体变大,占体积分数90%的颗粒粒径大于206.170μm,明显的大于原泥。实验表明,PAM是通过＂架桥吸附＂和＂水化作用＂改善污泥的脱水性能。%The water content and protein content of filtrate were tested to investigated the Cationic Polyacrylamide（PAM） improving sludge dewateringability.Experimental results indicate that sludge dewateringability was improved by PAM,the optimum dosage of PAM is 0.96mg/g solids,and the corresponding water content of filtered sludge is 73.38%.Size distribution were made to study the action mechanism of PAM on sludge,the floc of sludge was enlarged when PAM was added into sludge,and accounts for 90% of volume fraction is up 206.170μm,obviouly lagrer than that in the original sludge.It concludes that PAM improves sludge＇s dewateringability through＂bridge＂adsorption and ＂water action＂.