李亚林^1,,
刘蕾¹,
张景玉¹,
任萌萌¹,
李可心¹,
杨瑞丽¹
1.河南工程学院资源与环境学院，郑州 451191
基金项目: 河南省科技攻关项目162102310402
郑州市科技攻关项目20150237
河南工程学院博士基金项目D2015008河南省科技攻关项目(162102310402)
郑州市科技攻关项目(20150237)
河南工程学院博士基金项目(D2015008)

Variation characteristics of extracellular polymeric substances in sewage sludge dewatering by coordination of electro-osmotic and Fe2+- sodium persulfate oxidation process

LI Yalin^1,,
LIU Lei¹,
ZHANG Jingyu¹,
REN Mengmeng¹,
LI Kexin¹,
YANG Ruili¹
1.School of Resources and Environment, Henan Institute of Engineering, Zhengzhou 451191, China

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摘要:为了考察电渗透耦合Fe2+-过硫酸钠污泥深度脱水的机制，采用自制装置对市政污水处理厂的污泥进行了脱水研究。系统研究了在不同电压梯度、机械压力、过硫酸钠投加量、Fe2+与过硫酸钠比例、阴阳极间距等操作条件下，污泥中胞外聚合物(EPS)的组成及分布对污泥脱水效果的影响。结果表明，电渗透耦合Fe2+-过硫酸钠可以改善污泥的脱水效果，过硫酸钠经过Fe2+和热活化作用产生的硫酸根自由基对污泥中EPS的破坏作用明显，从而造成EPS特性改变。其中，紧密型胞外聚合物(TB-EPS)中的蛋白质和多糖、松散型胞外聚合物(LB-EPS)中的蛋白质及各层EPS中的蛋白质/多糖与污泥脱水效果存在显著相关性；黏性胞外聚合物(S-EPS)和LB-EPS中的多糖与污泥脱水效果存在显著相关性。TB-EPS、LB-EPS及其中含有的蛋白质和多糖含量是影响污泥电渗透耦合Fe2+-过硫酸钠脱水效果的主要因素。
关键词: 污泥脱水/
电渗透/
Fe2+-过硫酸钠/
胞外聚合物

Abstract:In order to investigate the mechanisms of sewage sludge dewatering by coordination of electro-osmotic and Fe2+-sodium persulfate oxidation process, the dewatered sludge from a sewage treatment plant was treated by a self-made experimental device. The effects of EPS constituent and distribution on sludge dewatering behavior were investigated under the different voltage gradients, mechanical pressures, persulfate dosages, the ratios of Fe2+ and sodium persulfate, and anode-cathode distances. The results showed that sludge dewatering effect can be improved by the coordination process of electro-osmosis and Fe2+-sodium persulfate oxidation. The sulfate radical anions produced from sodium persulfate activated by Fe2+ and thermal activation presented an obvious damage to EPS in the sludge, thus the EPS characteristics changed. The protein in tightly bound extracellular polymeric substances (TB-EPS) and loosely bound extracellular polymeric substances (LB-EPS) and the ratio of protein to polysaccharide in three layer EPS significantly correlated with the sludge dewatering effect, so did the polysaccharide in TB-EPS, in slime extracellular polymeric substances (S-EPS) and LB-EPS. The TB-EPS, LB-EPS, and their protein, polysaccharide contents are the primary factors affecting sludge dewatering by the coordination process of electro-osmosis and Fe2+- sodium persulfate oxidation.
Key words:sludge dewatering/
electro-osmosis/
Fe2+- sodium persulfate/
extracellular polymeric substances.

[1]	YU W B, YANG J K, WU X, et al. Study on dewaterability limit and energy consumption in sewage sludge electro-dewatering by in-situ linear sweep voltammetry analysis[J]. Chemical Engineering Journal, 2017, 317(1): 980-987.
[2]	LIU Y, HERBERT H P F. Influences of extracellular polymeric substances (EPS) on flocculation, settling, and dewatering of activated sludge[J]. Critical Reviews in Environmental Science & Technology, 2003, 33(3): 237-273.
[3]	HOUGHTON J I, STEPHENSON T. Effect of influent organic content on digested sludge extracellular polymer content and dewaterability[J]. Water Research, 2002, 36(14): 3620-3628.
[4]	SEVIOUR T, YUAN Z G, VAN LOOSDRECHT M C M, et al. Aerobic sludge granulation: A tale of two polysaccharides[J]. Water Research, 2012, 46(15): 4803-4813.
[5]	唐海, 沙俊鹏, 欧阳龙, 等. Fe(Ⅱ)活化过硫酸盐氧化破解剩余污泥[J]. 化工学报, 2015, 66(2): 785-792.
[6]	LU J, RAO S, LE T, et al. Increasing cake soli of cellulosic sludge through enzyme-assisted dewatering[J]. Process Biochemistry, 2011, 46(1): 353-357.
[7]	ZHANG G, HE J, ZHANG P, et al. Ultrasonic reduction of excess sludge from activated sludge system II: Urban sewage treatment[J]. Journal of Hazardous Materials, 2009, 164(2): 1105-1109.
[8]	RUIZ-HERNANDO M, MARTINEZ-ELORZA G, LABANDA J, et al. Dewaterability of sewage sludge by ultrasonic, thermal and chemical treatments[J]. Chemical Engineering Journal, 2013, 230(16): 102-110.
[9]	CONRARDY J B, VAXELAIRE J, OLIVIER J. Electro-dewatering of activated sludge: Electrical resistance analysis[J]. Water Research, 2016, 100: 194-200.
[10]	LI Y, YUAN X, WU Z, et al. Enhancing the sludge dewaterability by electrolysis/electrocoagulation combined with zero-valent iron activated persulfate process[J]. Chemical Engineering Journal, 2016, 303: 636-645.
[11]	ZHEN G, LU X, LI Y, et al. Innovative combination of electrolysis and Fe(II)-activatedpersulfate oxidation for improving the dewaterability of waste activated sludge[J]. Bioresource Technology, 2013, 136: 654-663.
[12]	李亚林, 刘蕾, 侯金金, 等. 电渗透-过硫酸铵氧化协同强化污泥深度脱水[J]. 化工进展, 2017, 36(5): 1919-1926.
[13]	李亚林, 刘蕾, 张毅, 等. 电渗透/Fe-过硫酸盐氧化协同强化污泥深度脱水[J]. 化工学报, 2016, 67(9): 4013-4019.
[14]	李亚林, 戚蓝月, 胡听听, 等. 电渗透-过硫酸盐氧化对污泥胞外聚合物的影响[J]. 工业安全与环保, 2017, 43(6): 93-97.
[15]	LI X Y, YANG S F. Influence of loosely bound extracellular polymeric substances (EPS) on the flocculation, sedimentation and dewaterability of activated sludge[J]. Water Research, 2007, 41(5): 1022-1030.
[16]	FR?LUND B, GRIEBE T, NIELSEN P H. Enzymatic activity in the activated sludge sludge flocs matrix[J]. Applied Microbiology Biotechnology, 1995, 43(4): 755-761.
[17]	YU G H, HE P J, SHAO L M, et al. Extracellular proteins, polysaccharides and enzymes impact on sludge aerobic digestion after ultrasonic pretreatment[J]. Water Research, 2008, 42(8): 1925-1934.
[18]	TAN C, GAO N, DENG Y, et al. Heat-activated persulfate oxidation of diuron in water[J]. Chemical Engineering Journal, 2012, 203(5): 294-300.
[19]	MAHMOUD A, OLIVER J, VAXELAIRE J, et al. Electro-dewatering of wastewater sludge: Influence of the operating conditions and their interactions effects[J]. Water Research, 2011, 45(9): 2795-2810.
[20]	ZHEN G, LU X, ZHAO Y, et al. Enhanced dewaterability of sewage sludge in the presence of Fe(II)-activated persulfate oxidation[J]. Bioresource Technology, 2012, 116: 259-265.
[21]	CETIN S, ERDINCLER A. The role of carbohydrate and protein parts of extracellular polymeric substances on the dewaterability of biological sludges[J]. Water Science & Technology, 2004, 50(9): 49-56.
[22]	MORGAN J W, FORSTER C F, EVISON L. A comparative study of the nature of biopolymers extracted from anaerobic and activated sludges[J]. Water Research, 1990, 24(6):743-750.
[23]	OLIVIER J, MAHMOUD A, VAXELAIRE J, et al. Electro-dewatering of anaerobically digested and activated sludges: An energy aspect analysis[J]. Drying Technology, 2014, 32(9): 1091-1103.
[24]	SHI Y F, YANG J K, MAO W, et al. Influence of Fe2+-sodium persulfate on extracellular polymeric substances and dewaterability of sewage sludge[J]. Desalination and Water Treatment, 2015, 53(10): 2655-2663.
[25]	ZHEN G, LU X, NIU J, et al. Inhibitory effects of a shock load of Fe(II)-mediated persulfate oxidation on waste activated sludge anaerobic digestion[J]. Chemical Engineering Journal, 2013, 233: 274-281.
[26]	LIANG C, BRUELL C J, MARLEY M C, et al. Persulfate oxidation for in situ remediation of TCE(Ⅱ): Activated by chelated ferrous ion[J]. Chemosphere, 2004, 55(9): 1225-1233.
[27]	OH S Y, KIM H W, PARK J M, et al. Oxidation of polyvinyl alcohol by persulfate activated with heat, Fe2+, and zero-valent iron[J]. Journal of Hazardous Materials, 2009, 168(1) :346-351.
[28]	JIYEON H, LEI Z, SUNKEUN S, et al. Protein recovery from excess sludge for its use as animal feed[J]. Bioresource Technology, 2008, 99(18): 8949-8954.

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刊出日期:2019-02-02

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电渗透耦合Fe2+-过硫酸钠污泥脱水过程中EPS的变化特性

李亚林^1,,
刘蕾¹,
张景玉¹,
任萌萌¹,
李可心¹,
杨瑞丽¹
1.河南工程学院资源与环境学院，郑州 451191
基金项目: 河南省科技攻关项目162102310402 郑州市科技攻关项目20150237 河南工程学院博士基金项目D2015008河南省科技攻关项目(162102310402) 郑州市科技攻关项目(20150237) 河南工程学院博士基金项目(D2015008)
关键词: 污泥脱水/
电渗透/
Fe2+-过硫酸钠/
胞外聚合物
摘要:为了考察电渗透耦合Fe2+-过硫酸钠污泥深度脱水的机制，采用自制装置对市政污水处理厂的污泥进行了脱水研究。系统研究了在不同电压梯度、机械压力、过硫酸钠投加量、Fe2+与过硫酸钠比例、阴阳极间距等操作条件下，污泥中胞外聚合物(EPS)的组成及分布对污泥脱水效果的影响。结果表明，电渗透耦合Fe2+-过硫酸钠可以改善污泥的脱水效果，过硫酸钠经过Fe2+和热活化作用产生的硫酸根自由基对污泥中EPS的破坏作用明显，从而造成EPS特性改变。其中，紧密型胞外聚合物(TB-EPS)中的蛋白质和多糖、松散型胞外聚合物(LB-EPS)中的蛋白质及各层EPS中的蛋白质/多糖与污泥脱水效果存在显著相关性；黏性胞外聚合物(S-EPS)和LB-EPS中的多糖与污泥脱水效果存在显著相关性。TB-EPS、LB-EPS及其中含有的蛋白质和多糖含量是影响污泥电渗透耦合Fe2+-过硫酸钠脱水效果的主要因素。

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