| 活化过硫酸盐对市政污泥调理效果的影响 |
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| 引用本文： | 徐鑫,濮文虹,时亚飞,虞文波,张诗楠,宋健,张昊,何姝,杨昌柱,杨家宽.活化过硫酸盐对市政污泥调理效果的影响[J].环境科学,2015,36(11):4202-4207. |
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| 作者姓名： | 徐鑫 濮文虹 时亚飞 虞文波 张诗楠 宋健 张昊 何姝 杨昌柱 杨家宽 |
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| 作者单位： | 华中科技大学环境科学与工程学院, 武汉 430074;江苏省环境科学研究院, 南京 210036;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074;宇星科技发展(深圳)有限公司, 深圳 518057;华中科技大学环境科学与工程学院, 武汉 430074;华中科技大学环境科学与工程学院, 武汉 430074 |
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| 基金项目： | 教育部科学技术研究项目(113046A); 中央高校基本科研业务费专项(2013TS071) |
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| 摘 要： | 常规污泥脱水技术只能将市政污泥含水率降到80%左右,难以满足日益严格的污泥处理处置要求.活化过硫酸盐产生硫酸根自由基SO4·-具有强氧化性,可用于破坏污泥的絮体结构.本研究利用Fe2+活化过硫酸钠(SPS)的方法进行污泥调理,以到达改善污泥的脱水性能的目的.结果表明,当Fe2+与S2O2-8投加量(以绝干污泥计)分别为25.88 mg·g-1、80 mg·g-1(Fe2+与S2O2-8摩尔比为1.1∶1)时,污泥毛细吸水时间CST和污泥比阻SRF降低率最大,滤液中蛋白质和多糖浓度达到最大.进一步的研究表明,污泥Zeta电位值由负向正变化,颗粒比表面积增大,絮体由密集的团状变成结构松散的层状结构,污泥脱水性能提高.
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| 关 键 词： | 过硫酸盐 污泥调理 胞外聚合物 高级氧化 脱水性 |
| 收稿时间： | 2014/12/25 0:00:00 |
| 修稿时间： | 7/6/2015 12:00:00 AM |
Influence of the Application of Activated Persulfate on Municipal Sludge Conditioning |
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| XU Xin,PU Wen-hong,SHI Ya-fei,YU Wen-bo,ZHANG Shi-nan,SONG Jian,ZHANG Hao,HE Shu,YANG Chang-zhu and YANG Jia-kuan.Influence of the Application of Activated Persulfate on Municipal Sludge Conditioning[J].Chinese Journal of Environmental Science,2015,36(11):4202-4207. |
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| Authors: | XU Xin PU Wen-hong SHI Ya-fei YU Wen-bo ZHANG Shi-nan SONG Jian ZHANG Hao HE Shu YANG Chang-zhu and YANG Jia-kuan |
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| Affiliation: | School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;Universtar Science & Technology (Shenzhen) Co., Ltd., Shenzhen 518057, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China;School of Environmental Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, China |
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| Abstract: | The water content of dewatered sewage sludge can decrease at about 80% by traditional sludge dewatering technologies. High water content has negative impacts on the sequent sludge disposal with a stricter standard. The sulfate free radical SO4 ·-, generated by activated persulfate, is a powerful oxidant. This article found that it could improve sludge dewatering properties by using the Fe2+ activated sodium persulfate (SPS). The results showed that when using Fe2+ 25.88 mg ·g-1 (based on dry sludge solid) and S2O82- 80 mg ·g-1(the mole ratio of Fe2+ to S2O82- was 1.1 :1) for sludge conditioning, it could reduce the capillary suction time (CST) and specific resistance to filtration (RSF) of sludge, increased the protein and ploysaccharide as well as the COD concentration in the filtrate. The further research showed that this method could change the zeta potential of sludge, increased the sludge particle specific surface area, and made flocs become a loose layered structure from dense clusters, which was beneficial to improve the sludge dewaterability. |
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| Keywords: | persulfate sludge conditioning extracellular polymeric substances (EPS) advanced oxidation dewaterability |
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