Abstract:

Poly-DMDAAC-AM(PDA) has been synthesized by aqueous solution polymerization process. The fac-tors which have effects on the synthesis of PDA, such as solution pH, n(AM):n(DMDAAC), initiator dosage, etc., are studied. When its pH is 3, n(AM):n(DMDAAC)＝4:1, and initiator concentration 1.0×10^-4 mol/L, the relative molecular weight and cationic ion degree of the produced PDA are the highest. After the urban sludge has been tem-pered with synthesized PDA and inorganic salts, the requirements stipulated by the state environmental protection administration for enhancing the prevention and control of sludge pollution in urban sludge treatment plants can be met. The advanced dewatering of sludge can thus be realized successfully.

Key words: cationic type, flocculent, Poly-DMDAAC-AM, advanced dehydration of sludge

摘要：

采用水溶液聚合法合成聚二甲基二烯丙基氯化铵-丙烯酰胺（Poly-DMDAAC-AM，PDA），研究了体系溶液的pH、n（AM）：n（DMDAAC）、引发剂投加量等因素对合成PDA的影响，当pH=3、n（AM）：n（DMDAAC）=4：1、引发剂浓度为1.0×10^-4 mol/L时，合成的PDA产品相对分子质量和阳离子离子度最高。采用合成的PDA与无机盐对城市污泥进行调理后顺利达到国家环保部关于加强城镇污水处理厂污泥污染防治的要求，成功实现污泥深度脱水。

关键词: 阳离子型, 絮凝剂, 聚二甲基二烯丙基氯化铵-丙烯酰胺, 污泥深度脱水

CLC Number: 

• X703.1