不同絮凝剂对剩余污泥水解和脱水特性的影响

摘要

This paper studied the effects on hydrolysis and dewatering performance of excess sludge by inorganic and organic flocculants. Adding 20g/L CaO and CPAM (cationic polyacrylamide)to adjust the excess sludge,the dissolution of organic matter were described as below:the dissolubility of solution chemical oxygen demand(SCOD)was CPAM>CaO>blank. The dissolubility of soluble protein(SPN)was CPAM>CaO>blank. The dissolubility of soluble polysaccharide(SPS)was CaO>CPAM>blank. Changes in the indicators of dewatering performance,specific resistance to filtration (SRF) and the filter cake containing solid rate were described as the following:the basic change of SRF was CPAMCaO>blank after the 4th day. From the dissolution of SCOD、SPN,SPS,the change of SRF and filter cake containing solid rate,it was concluded that adding the same concentration of CaO and CPAM were more beneficial for hydrolyzing and dewatering.%研究了无机和有机絮凝剂对剩余污泥水解和脱水性能的影响。分别投加浓度为20g/L的CaO和CPAM（阳离子型聚丙烯酰胺）调节剩余污泥，溶出的有机质规律如下：溶解性COD（SCOD）的溶出量表现为CPAM>CaO>空白；溶解性蛋白质（SPN）的溶出量表现为 CPAM>CaO>空白；溶解性碳水化合物（SPS）的溶出量表现为CaO>CPAM>空白。污泥的脱水性能指标--比阻（SRF）和滤饼含固率的变化分别为：SRF表现为CPAMCaO>空白。从SPN、SPS和SCOD的溶出量、比阻和滤饼含固率的变化说明：加入CaO和CPAM都能改善剩余污泥的水解和污泥脱水性能。