不同pH值下表面活性剂对污泥脱水性能影响的研究  

Effect of Surfactants on Sludge Dewatering Performance under Different pH Values

作　　者：刘说 何萍[1] 张京京[1] LIU Shuo;HE Ping;ZHANG Jing-jing(College of Chemistry and Environmental Engineering,Yingkou Institute of Technology,Yingkou 115014,China)

机构地区：[1]营口理工学院化学与环境工程学院,辽宁营口115014

出　　处：《化学试剂》2021年第7期884-888,共5页Chemical Reagents

基　　金：辽宁省自然科学基金区域创新发展联合基金项目(2020-YKLH-30);营口理工学院预研项目自然科学基金项目(YYL201907)。

摘　　要：通过测定比阻、滤饼含水率、污泥胞外聚合物(EPS)中蛋白质和多糖、污泥沉降体积和污泥毛细吸水时间(CST),研究不同pH值下表面活性剂对污泥脱水性能的影响,采用十二烷基硫酸钠(SDS)作为表面活性剂,在不同pH值下对污泥脱水性能进行了研究,考察了调理污泥的脱水速率、脱水程度、沉降性和滤失性4个方面。结果表明,在原污泥20 g、SDS投加量为污泥干重8%、浓硫酸调节溶液至pH 3的条件下,比阻0.44×10^(9) m/kg、滤饼含水率65.10%、污泥胞外聚合物中含蛋白质526.2 mg/g和多糖87.7 mg/g、污泥沉降体积55.4 mL和污泥毛细吸水时间80 s,污泥脱水效果较好。The effects of pH values on the dewatering performance of sludge were studied by measuring the specific resistance, the moisture content of filter cake, protein and polysaccharide in sludge extracellular polymer(EPS),sludge settling volume, and sludge capillary water absorption time(CST).Sodium dodecyl sulfate was used as surfactant to study the sludge dewatering performance under different pH values.The dewatering rate, dehydration degree, sedimentation and filtration of the conditioning sludge were investigated.The original sludge was 20 g, the dosage of SDS was 8% of sludge dry weight, and solution of pH 3 was adjusted by concentrated sulfuric acid.The results showed that the specific resistance was 0.44×10^(9) m/kg, the moisture content of filter cake was 65.10%,protein and polysaccharide in EPS were 526.2 mg/g and 87.7 mg/g, sludge settling volume was 55.4 mL,and sludge capillary water absorption time was 80 s resulted the best sludge dewatering performance.

关 键 词：污泥 表面活性剂 脱水性能 PH值 调理 

分 类 号：X705[环境科学与工程—环境工程]