ZHENGSong-chao,ZHANGYan-ping,LITian-tian,et al.Ultraviolet Coupled with Zero-valent Iron to Activate Persulfate for Improving Sludge Dewaterability[J].China Water & Wastewater,2023,39(11):15-22.
紫外协同零价铁活化过硫酸盐调理污泥脱水研究
- Title:
- Ultraviolet Coupled with Zero-valent Iron to Activate Persulfate for Improving Sludge Dewaterability
- 关键词:
- 污泥脱水; 过硫酸盐; 零价铁; 紫外线; 胞外聚合物（EPS）
- Keywords:
- sludge dewatering; persulfate; zero-valent iron; ultraviolet; extracellular polymeric substance (EPS)
- 摘要:
- 为了改善污泥的脱水性能，采用紫外协同零价铁活化过硫酸盐（UV/Fe0/PDS）调理污泥，并与PDS、UV/PDS和Fe0/PDS体系进行对比，以污泥毛细吸水时间（CST）、污泥比阻（SRF）和污泥滤饼含水率为表征指标，研究了反应时间、Fe0∶PDS（物质的量之比）、PDS投加量和初始pH对污泥脱水的影响，并对机理进行解析。结果表明，UV可在一定程度上协同Fe0活化PDS，进而提高污泥脱水性能；在室温、初始pH为4、Fe0∶PDS为0.6、PDS投加量为200 mg/g（以TS计）的条件下，UV照射反应20 min，CST由61.5 s降至19.2 s，SRF由10.9×1012 m/kg降至2.2×1012 m/kg，滤饼含水率降至73.9%。EPS分析结果表明，SO4-·可将高亲水性的疏松结合型胞外聚合物（LB-EPS）和紧密结合型EPS（TB-EPS）转化为可溶性的黏液层EPS（S-EPS），并使EPS中不利于污泥脱水的蛋白质类物质减少；SEM与Zeta电位分析结果表明，经UV/Fe0/PDS调理后，污泥絮体破碎，Zeta电位绝对值降低，这有利于污泥脱水。
- Abstract:
- To improve the dewatering performance of sludge, ultraviolet coupled with zero?valent iron to activate persulfate (UV/Fe0/PDS) was used to condition the sludge, and the results were compared with that of the PDS, UV/PDS and Fe0/PDS systems. Using capillary suction time (CST), specific resistance of filtration (SRF) and sludge cake moisture content as evaluation indexes, the effects of reaction time, molar ratio of Fe0 to PDS (Fe0∶PDS), PDS dosage and initial pH on sludge dewatering performance were investigated, and the mechanism was analyzed. UV could cooperate with Fe0 to activate PDS to a certain extent, so as to improve the sludge dewatering performance. Under the conditions of room temperature, initial pH of 4, Fe0∶PDS=0.6, PDS dosage of 200 mg/g and UV irradiation reaction for 20 min, CST was decreased from 61.5 s to 19.2 s, SRF was decreased from 10.9×1012 m/kg to 2.2×1012 m/kg, and the moisture content of sludge cake was decreased to 73.9%. The analysis of EPS showed that SO4-· could transform the highly hydrophilic loose binding extracellular polymer (LB-EPS) and tightly binding EPS (TB-EPS) into soluble EPS (S-EPS), and reduce the protein substances in EPS that were not beneficial to sludge dewatering. After UV/Fe0/PDS conditioning, the sludge floc was broken and the absolute value of Zeta potential was reduced, which was conducive to sludge dewatering.
相似文献/References:
[1]马慧峰,钱志军,熊仁久,等.生物沥浸+厢式隔膜板框压滤机用于城镇污泥脱水[J].中国给水排水,2018,34(20):112.
MA Hui feng,QIAN Zhi jun,XIONG Ren jiu,et al.Application of Bioleaching and Chamber Diaphragm Plate Filter Press System in Sludge Dewatering Process[J].China Water & Wastewater,2018,34(11):112.
[2]赵林辉,林莉峰,朱运涛.大型污泥焚烧项目的污泥脱水运行优化研究[J].中国给水排水,2021,37(12):145.
ZHAO Lin-hui,LIN Li-feng,ZHU Yun-tao.Study on Operation Optimization of Sludge Dewatering in Large Scale Sludge Incineration Project[J].China Water & Wastewater,2021,37(11):145.
[3]常新强,林涛,陈卫,等.PAC/PS预处理对水中镉的去除及UF膜污染控制[J].中国给水排水,2022,38(1):64.
CHANG Xin-qiang,LIN Tao,CHEN Wei,et al.PAC/PS Pretreatment Process for Removal of Cadmium from Water and Control of Ultrafiltration Membrane Fouling[J].China Water & Wastewater,2022,38(11):64.
[4]郑璐,成小翔,谷统翰,等.过硫酸盐高级氧化在膜法组合工艺中的研究进展[J].中国给水排水,2022,38(6):33.
ZHENGLu,CHENGXiao-xiang,GUTong-han,et al.Research Progress of Persulfate-based Advanced Oxidation in Membrane Combination Processes[J].China Water & Wastewater,2022,38(11):33.
[5]张轩,骆成杰,张晨,等.活性炭纤维阴极增强E-PS/PM体系去除水中CBZ[J].中国给水排水,2022,38(7):103.
ZHANGXuan,LUOCheng-jie,ZHANGChen,et al.E-PS/PM System for Carbamazepine Removal from Water Enhanced by Activated Carbon Fiber Cathode[J].China Water & Wastewater,2022,38(11):103.
[6]刘宇宁,张倩,谭斌,等.改性方法对生物炭复合体系降解活性蓝19的影响[J].中国给水排水,2022,38(19):69.
LIUYu-ning,ZHANGQian,TANBin,et al.Effect of Modification Methods on Biochar Composite System for Degradation of Reactive Blue 19[J].China Water & Wastewater,2022,38(11):69.
[7]汤连生,周展朋,郑邓衡,等.聚乙二醇溶液渗析联合真空的污泥脱水研究[J].中国给水排水,2023,39(9):78.
TANGLian-sheng,ZHOUZhan-peng,ZHENGDeng-heng,et al.Sludge Dewatering Performance of Polyethylene Glycol Solution Dialysis Combined with Vacuum Pressure[J].China Water & Wastewater,2023,39(11):78.
[8]张彦平,郑松超,孙雪萌,等.热改性给水污泥联合酸提液调理促进剩余污泥脱水[J].中国给水排水,2023,39(13):39.
ZHANGYan-ping,ZHENGSong-chao,SUNXue-meng,et al.Heat Modified Sludge from Waterworks Combined with Its Acid Extract Conditioning to Promote Excess Sludge Dewatering[J].China Water & Wastewater,2023,39(11):39.
[9]何妙琳,张彦平,李一兵.电解耦合Fe2+活化过硫酸盐强化污泥脱水及其机理[J].中国给水排水,2023,39(15):15.
HEMiao-lin,ZHANGYan-ping,LIYi-bing.Enhancement and Mechnism of Electrolysis Coupled Fe2+-activated Persulfate Oxidation for Excess Sludge Dewatering[J].China Water & Wastewater,2023,39(11):15.
[10]蓝梅,应媛媛,罗海慧,等.典型污水处理工艺的污泥调理机制研究[J].中国给水排水,2023,39(15):94.
LAN Mei,YING Yuan-yuan,LUO Hai-hui,et al.Sludge Conditioning Mechanism of Typical Wastewater Treatment Processes[J].China Water & Wastewater,2023,39(11):94.