EDTA络合Fe(Ⅲ)活化影响剩余污泥脱水性能研究  

Study on the Effect of EDTA Complex Fe(Ⅲ)Activation on the Dewatering Performance of Excess Sludge

作　　者：卢顺 朱雷[1] 郭绍东 李晨曦 陈泽星 LU Shun;ZHU Lei;GUO Shaodong;LI Chenxi;CHEN Zexing(Wuhan University of Science and Technology,Wuhan 430065,China)

机构地区：[1]武汉科技大学,湖北武汉430065

出　　处：《水处理技术》2021年第9期63-66,76,共5页Technology of Water Treatment

基　　金：湖北省教育厅科学研究计划指导性资助项目(B2018008)。

摘　　要：以EDTA为金属络合剂、Fe(Ⅲ)为活化剂,在传统过硫酸盐投加法的基础上强化污泥的脱水性能。结果表明,活化处理后,过二硫酸钾和过一硫酸钾体系中污泥毛细吸水时间分别降低至原污泥的52.7%和39.2%,滤液中蛋白质含量分别增加到原污泥的238%和193%,污泥胞外聚合物被氧化分解,有机物质含量降低使得污泥结构变得松散。Fe^(3+)处理后污泥CST下降为Fe^(2+)处理后污泥毛细吸水时间(CST)的90.1%,蛋白质含量增加了8.02%,多糖含量下降了35.2%,TN、TP、NH_(4)^(+)-N和PO_(4)^(3-)-P含量分别增加约159%、82%、148%和208%。加药处理后的污泥结构被破坏,蛋白质被释放,污泥脱水性能得到显著提高,且过二硫酸钾处理效果优于过一硫酸钾。In this study,EDTA was used as the metal complexing agent and Fe(Ⅲ)was used as the activator.The dewatering performance of the sludge was enhanced based on the traditional persulfate addition method.After the activation treatment,the capillary water absorption time of the sludge in the peroxydisulfate and peroxymonosulfate systems was reduced to 52.7%and 39.2%of the original sludge,respectively,and the protein content of the filtrate increased to 238% and 193% of the original sludge,respectively.The sludge extracellular polymer(EPS)was oxidized and decomposed,and the concentration of organic matter was reduced,which made the sludge structure loose.The CST of the sludge after Fe3+treatment decreased to 90.1%of the CST after Fe^(2+) treatment,protein concentration increased by 8.02%,polysaccharide concentration decreased by 35.2%,and nitrogen and phosphorus element concentrations increased by about 159%,82%,148%,and 208%,respectively.The results showed that the sludge structure was destroyed and protein was released,and the sludge dewatering performance was significantly improved after the dosing treatment in this experiment.The treatment performance of peroxydisulfate was better than peroxymonosulfate.

关 键 词：剩余活性污泥 过硫酸盐 Fe(Ⅲ) EDTA 

分 类 号：X703.1[环境科学与工程—环境工程]