摘要
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CPAM<CaO<空白,投加CaO时SRF在第1天出现最小值(0.91×1013m/kg),投加CPAM时SRF在第7天出现最小值(0.71×1013m/kg),两者都处于中难度脱水范围内;滤饼含固率在后4天后表现为CPAM>CaO>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。
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 CPAM〈CaO〈blank, and the added CaO made SRF reach the minimum value （0.91×10^13m/kg） on the 4th day, and the added CPAM made SRF reach the minimum value （ 0.71 ×10^13m/kg ） on the 7th day. Both results were considered as difficult dewatering. The change of filter cake containing solid rate was CPAM〉CaO〉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 addingthe same concentration of CaO and CPAM were more beneficial for hydrolyzing and dewatering.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2014年第10期2790-2794,共5页
Chemical Industry and Engineering Progress
基金
天津市科技计划(13CEDGX03100)
天津市水质科学与技术重点实验室开放研究基金(TJKLAST-2011-11)
天津市滨海新区科技创新专项资金资助"十大战役"重大科技支撑(2011-BH140003)项目
关键词
无机絮凝剂
有机絮凝剂
剩余污泥
脱水性能
水解
有机质
inorganic flocculants
organic flocculants
excess sludge
dewatering performance
hydrolysis
organic matter
