Abstract:The acidification combined with steel slag-catalytic persulfate (PS) pretreatment technology was applied to sludge conditioning and the sludge dewatering performance was investigated by the single-factor experiment. The optimal pretreatment conditions for sludge were temperature of 25℃, pH 3, mixing time of 30min, and dosing levels of 100mg/g TS and 280mg/g TS for steel slag and PS, respectively, the sludge specific resistance and sludge cake water content decreased from 9.23×1012m/kg and 85% of the raw sludge to 1.89×1012m/kg and 77% respectively. Fourier transform infrared spectroscopy, three-dimensional fluorescence spectroscopy, polysaccharide, protein and free radicals quenching experiments were characterizated mechanism for steel slag-catalytic PS pretreatment promoting sludge dewatering performance: The SO4−• and •OH generated by slag-catalytic PS can destroy the sludge extracellular polymeric substances and biological cell structure, thereby reducing the content of hydrophilic functional groups and promoting the release of bound water.
李文秀, 宋秀兰, 吴宇琦. 酸化联合钢渣催化过硫酸盐预处理对污泥脱水性能的影响研究[J]. 中国环境科学, 2023, 43(7): 3509-3517.
LI Wen-xiu, SONG Xiu-lan, WU Yu-qi. Effect of pretreatment though acidification combined with persulfate catalyzed by steel slag on dewaterability of sludge. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3509-3517.
Wang H F, Qi H Y, Lian Z H, et al. A unified operating procedure is crucial to evaluate sludge dewaterability, taking the setup of refrigerated storage time as an example [J]. Journal of Environmental Management, 2022,307:114528.
[2]
王 琳,李德彬,刘子为,等.污泥处理处置路径碳排放分析 [J]. 中国环境科学, 2022,42(5):2404-2412. Wang L, Li D B, Liu Z W, et al. Analysis on carbon emission from sludge treatment and disposal [J]. China Environmental Science, 2022, 42(5):2251-2259.
[3]
Cao B D, Zhang T, Zhang W J, et al. Enhanced technology based for sewage sludge deep dewatering: A critical review [J]. Water Research, 2021,189:19.
[4]
李亚林,陈高昂,孙丽莉,等.交变电场-铁改性生物质强化城市污泥深度脱水 [J]. 中国环境科学, 2022,42(7):3140-3148. Li Y L, Chen G A, Sun L L, et al. Alternating electric field combined with iron-modified biomass to enhance the deep-dewatering of municipal sludge [J]. China Environmental Science, 2022,42(7): 3140-3148.
[5]
董黎明,郑心愿,胡修玉,等.丝状真菌调理对柠檬酸污泥脱水性能的影响 [J]. 中国环境科学, 2019,39(6):2467-2474. Dong L M, Zhen X Y, Hu X Y, et al. The effects on citric acid sludge dewatering with filamentous fungi conditioning [J]. China Environmental Science, 2019,39(6):2467-2474.
[6]
杨黎俊,宋秀兰,张 苗.Fe2+激活过一硫酸盐调理剩余污泥的研究 [J]. 太原理工大学学报, 2019,50(3):308-314. Yang L J, Song X L, Zhang M. Conditioning of excess sludge by Fe2+ activated peroxymonosulfate [J]. Journal of Taiyuan University of Technology, 2019,50(3):308-314.
[7]
徐文迪,常 沙,明铁山,等.基于硫酸根自由基(SO4−•)的污泥预处理技术 [J]. 环境工程学报, 2018,12(5):1528-1535. Xu W D, Chang S, Ming T S, et al. Pretreatment technology of sewage of sludge with sulfate radical (SO4−•) [J]. Chinese Journal of Environmental Engineering, 2018,12(5):1528-1535.
[8]
张 浩,韩伟胜,程峥明,等.基于SEM与FTIR研究改性钢渣/橡胶复合材料的热氧老化机理 [J]. 光谱学与光谱分析, 2022,42(12): 3906-3912. Zhang H, Han W S, Cheng Z M, et al. Thermal oxidative aging mechanism of modified steel slag/rubber composites based on SEM and FTIR [J]. Spectroscopy and Spectral Analysis, 2022,42(12):3906-3912.
[9]
Wan S, Han Y, Zhou M, et al. Improvement of sewage sludge dewaterability and immobilization of the heavy metals by using pretreated steel slag [J]. Desalination and Water Treatment, 2020,182: 135-143.
[10]
于衍真,谭 娟,冯 岩,等.一种钢渣制备的复合污泥絮凝脱水调理剂:中国, CN201210004102.1 [P]. 2012-07-11. Yu Y Z, Tan J, Feng Y, et al. A composite sludge flocculation and dewatering conditioning agent prepared from steel slag: China, CN201210004102.1 [P]. 2012-07-11.
[11]
郭 越.改性钢渣活化过硫酸盐处理印染废水的研究 [D]. 太原:太原理工大学, 2022. Guo Y. Treatment of printing and dyeing wastewater by modified steel slag activated persulfate [D]. Taiyuan: Taiyuan University of Technology, 2022.
[12]
郭婧怡,马扬帆,杨绍贵,等.切割钢渣活化过硫酸盐降解偶氮类染料酸性红73 [J]. 环境科学学报, 2019,39(8):2550-2558. Guo J Y, Ma Y F, Yang S G, et al. Degradation of acid red 73 by persulfate activated by steel slag [J]. Acta Scientiae Circumstantiae, 2019,39(8):2550-2558.
[13]
徐西蒙,宗绍燕,刘 丹.钢渣碱活化过硫酸盐降解双酚A [J]. 中国环境科学, 2019,39(7):2889-2895. Xu X M, Zong S Y, Liu D. Bisphenol A degradation by base-activated persulfate using steel slag [J]. China Environmental Science, 2019, 39(7):2889-2895.
[14]
周世暄.超声/过硫酸盐预处理技术对污泥脱水以及厌氧消化的影响 [D]. 南昌:南昌大学, 2021. Zhou S X. The effect of ultrasonic/persulfate pretreatment on sludge dewatering and anaerobic digestion [D]. Nanchang: Nanchang University, 2021.
[15]
阮书瑜.亚铁/固态过氧化氢改善剩余活性污泥脱水性能的研究 [D]. 杭州:浙江工业大学, 2020. Ruan S Y. Improving dewaterability of waste activated sludge by ferrous/solid-phase H2O2 processes [D]. Hangzhou: Zhejiang University of Technology, 2020.
[16]
薛 茂.Fe(Ⅱ)-过硫酸盐调理污泥过程中EPS亲疏水组成的影响与调控 [D]. 哈尔滨:哈尔滨工业大学, 2019. Xue M. Effect and regulation of hydrophobic/hydrophilic composition of EPS in the process of Fe2+ activated persulfate conditioning sludge [D]. Harbin: Harbin Institute of Technology, 2019.
[17]
王一平.铋酸铜表面性质调控及其活化过一硫酸盐去除水中典型难降解有机污染物研究 [D]. 北京:北京林业大学, 2021. Wang Y P. Regulation of CuBi2O4 surface properties for enhanced peroxymonosulfate activation to degrade typical refractory organic pollutants [D]. Beijing: Beijing Forestry University, 2021.
[18]
Li H, Zhou M, Han Y, et al. Mechanism of red mud combined with steel slag conditioning for sewage sludge dewatering [J]. Desalination and Water Treatment, 2018,135:133-140.
[19]
Wei H, Tang Y N, Li A M, et al. Insights into the effects of acidification on sewage sludge dewaterability through pH repeated adjustment [J]. Chemosphere, 2019,227:269-276.
[20]
Miralles C S, Oller I, Ruíz D A, et al. EDDS as complexing agent for enhancing solar advanced oxidation processes in natural water: Effect of iron species and different oxidants [J]. Journal of Hazardous Materials, 2018,372:129-136.
[21]
Li E R, Wang Y L, Zhang D X, et al. Siderite/PMS conditioning-pressurized vertical electro-osmotic dewatering process for activated sludge volume reduction: Evolution of protein secondary structure and typical amino acid in EPS [J]. Water Research, 2021,201:10.
[22]
Ling X, Chen M J, Cai A H, et al. A novel pre-magnetized ZVI/PS pretreatment for improving sludge dewaterability: The role of EPS fractions [J]. Journal of Environmental Management, 2022,318: 115646.
[23]
Guo J Y, Gao Q F, Chen Y H, et al. Insight into sludge dewatering by advanced oxidation using persulfate as oxidant and Fe2+as activator: Performance, mechanism and extracellular polymers and heavy metals behaviors [J]. Journal of Environmental Management, 2021,288:10.
[24]
Ran B, Liu L Y, Hua C. Comprehensive investigation and mechanisms of drilling waste sludge dewaterability by Fe(II)/persulfate pretreatment [J]. Journal of Environmental Chemical Engineering, 2021,9(6):11.
[25]
Jaafarzadeh N, Ghanbari F, Ahmadi M. Catalytic degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by nano-Fe2O3 activated peroxymonosulfate: Influential factors and mechanism determination [J]. Chemosphere, 2017,169:568-576.
[26]
Yu W B, Wen Q Q, Yang J K, et al. Unraveling oxidation behaviors for intracellular and extracellular from different oxidants (HOCl vs H2O2) catalyzed by ferrous iron in waste activated sludge dewatering [J]. Water Research, 2019,148:60-69.
[27]
Liang J L, Zhang L, Zhou Y. Pyrite assisted peroxymonosulfate sludge conditioning: Uncover triclosan transformation during treatment [J]. Journal of Hazardous Materials, 2021,413:13.
[28]
吴 秀,方 迪,危亚云,等.热活化过一硫酸盐调理强化厌氧消化污泥脱水的研究 [J]. 环境科学学报, 2021,41(11):4547-4553. Wu X, Fang D, Wei Y Y, et al. Improved dewaterability of anaerobically digested sewage sludge by thermally activated peroxymonosulfate [J]. Acta Scientiae Circumstantiae, 2021,41(11): 4547-4553.
[29]
张 晨,李杨杨,董黎明,等.预加热对柠檬酸脱水污泥冬季生物干化的影响 [J]. 中国环境科学, 2019,39(7):2928-2937. Zhang C, Li Y Y, Dong L M, et al. Effect of pre-heating on bio-drying of citric acid dewatered sludge in winter [J]. China Environmental Science, 2019,39(7):2928-2937.
[30]
Chen K, Sun Y, Fan J, et al. The dewatering performance and cracking-flocculation-skeleton mechanism of bioleaching-coal fly ash combined process for sewage sludge [J]. Chemosphere, 2022,4:307.
[31]
Wang D B, Wang Y F, Liu X R, et al. Heat pretreatment assists free ammonia to enhance hydrogen production from waste activated sludge [J]. Bioresource Technology, 2019,283:316-325.
[32]
Wu M R, Liang Y M, Zhang Y G, et al. The effects of biodegradation on the characteristics and disinfection by-products formation of soluble microbial products chemical fractions [J]. Environmental Pollution, 2019,253:1047-1055.
[33]
Yuan L H, Liu H X, Lu Y J, et al. Enhancing the dewaterability of waste activated sludge by the combined ascorbic acid and zero-valent iron/persulfate system [J]. Chemosphere, 2022,303:135104.
[34]
李帅帅,刘玉玲,孙瑞浩,等.鼠李糖脂-热对污泥厌氧发酵中脱水性能的影响 [J]. 中国环境科学, 2021,41(12):5747-5754. Li S S, Liu Y L, Sun R H,et al. Effect of rhamnoHpid and heat on dewatering performance of sludge in anaerobic fermentation [J]. China Environmental Science, 2021,41(12):5747-5754.
[35]
Liang J L, Zhang S W, Huang J J, et al. Mechanism of zero valent iron and anaerobic mesophilic digestion combined with hydrogen peroxide pretreatment to enhance sludge dewaterability: Relationship between soluble EPS and rheological behavior [J]. Chemosphere, 2020,247: 125859.
[36]
白孟琦,李敏睿,丁欣欣,等.不同猝灭剂对SO4−•和•OH高级氧化体系的猝灭效果 [J]. 工业水处理, 2021,41(8):75-80. Bai M Q, Li M R, Ding X X, et al. Quenching effect of different quenchers on SO4−•and •OH based advanced oxidation processes [J]. Industrial Water Treatment, 2021,41(8):75-80.
[37]
Luo L, Ge Y J, Yuan S Y, et al. Enhanced dewaterability of waste activated sludge by a combined use of permanganate and peroxymonosulfate [J]. RSC Advances, 2019,9(47):27593-27601.
[38]
Ruan S Y, Deng J, Cai A H, et al. Improving dewaterability of waste activated sludge by thermally-activated persulfate oxidation at mild temperature [J]. Journal of Environmental Management, 2021,281: 111899.