紫外光联合二价铁活化过硫酸盐对污泥脱水影响及调理机制  

The influence of persulfate activation with a combination of ultraviolet light and ferrous iron on sludge dewaterability and its underlying mechanism

作　　者：蓝梅[1,2,3] 张慧龙 孔嘉璐 杨培森 李珅斐 黄文清 LAN Mei;ZHANG Huilong;KONG Jialu;YANG Peisen;LI Shenfei;HUANG Wenqing(Hebei Engineering Research Center of Sewage Treatment and Resource Utilization,Hebei University of Engineering,Handan 056038;Key Laboratory of Urban Water Utilization Technology of Handan City,Hebei University of Engineering,Handan 056038;Hebei Provincial Technology Innovation Center for Water Pollution Control and Water Ecological Restoration,Hebei University of Engineering,Handan 056038;Zhongshan Water Conservancy and Hydropower Survey and Design Consulting Co.,Ltd.,Zhongshan 528400)

机构地区：[1]河北工程大学污水处理及资源化利用河北省工程研究中心,邯郸056038 [2]河北工程大学邯郸市城市水利用技术重点实验室,邯郸056038 [3]河北工程大学河北省水污染控制与水生态修复技术创新中心,邯郸056038 [4]中山市水利水电勘测设计咨询有限公司,中山528400

出　　处：《环境科学学报》2025年第2期133-142,共10页Acta Scientiae Circumstantiae

基　　金：河北省高等学校科学技术研究重点项目(No.ZD2022065);河北省大气污染成因与影响重点实验室绩效补助经费(No.22567628H)。

摘　　要：采用紫外光联合二价铁(Fe^(2+))活化过硫酸氢钾(UV/Fe^(2+)/PMS)调理市政污泥,并将之与PMS、UV/PMS、Fe^(2+)/PMS进行对比,考察药物物质的量的比(PMS/Fe^(2+))、Fe^(2+)投加量和反应时间t对高级氧化体系污泥脱水性能的影响,并探讨其作用机理.实验结果表明紫外光对经Fe^(2+)活化后的过硫酸氢钾具有更进一步的活化作用,在反应时间t=30 min、PMS/Fe^(2+)为0.8、Fe^(2+)投加量为1.0 mmol·g^(-1)时,污泥毛细吸水时间(CST)和污泥比阻(SRF)分别降至25.9 s、3.03×10^(12)m·kg^(-1),但是PMS、UV/PMS调理污泥t=30 min时脱水性能恶化,胞外聚合物(EPS)分析结果表明其原因是EPS的未完全破解.扫描电镜(SEM)和粒径分析结果表明UV/Fe^(2+)/PMS体系调理污泥后污泥颗粒表面孔洞加大加深,污泥粒径增大,这有助于污泥脱水.三维荧光和红外图谱分析表明市政污泥中TB-EPS中荧光物质的转化和S-EPS中蛋白物质的氧化是提高污泥脱水性能的关键.This study explores the conditioning of Municipal sludge using ultraviolet light combined with ferrous ion(Fe^(2+))to activate potassium persulfate(UV/Fe^(2+)/PMS),and compare its performance with PMS,UV/PMS,and Fe^(2+)/PMS.The influence of molar ratio of the PMS/Fe^(2+),Fe^(2+)dosage,and reaction time(t)on the sludge dewatering performance were investigated.The underlying mechanisms were also discussed.The experimental results highlight that UV serves to activate potassium persulfate activated by Fe^(2+).At t of 30 min,with a PMS/Fe^(2+)molar ratio of 0.8,and Fe^(2+)dosage of 1.0 mmol·g^(-1),the capillary suction time(CST)and specific resistance to filtration(SRF)of the sludge decreased to 25.9 s and 3.03×10^(12)m·kg^(-1),respectively.In contrast,sludge conditioned with PMS and UV/PMS at t=30 min showed deteriorated dewatering performance due to incomplete dissolution of extracellular polymeric substances(EPS).Scanning electron microscopy(SEM)and particle size analysis results indicated that sludge particles exhibited enlarged surface pores and increased particle size after UV/Fe^(2+)/PMS conditioning,which facilitated sludge dewatering.Three-dimensional fluorescence and infrared spectroscopy analysis revealed that the transformation of fluorescent substances in tightly bound EPS(TBEPS)and the oxidation of proteins in soluble EPS(S-EPS)in municipal sludge were crucial for enhancing dewatering performance.

关 键 词：污泥脱水 UV/Fe^(2+)/PMS 高级氧化 胞外聚合物(EPS) 

分 类 号：X703[环境科学与工程—环境工程]