工程科学学报，第37卷，第9期：1239-1245,2015年9月 Chinese Journal of Engineering,Vol.37,No.9:1239-1245,September 2015 D0l:10.13374/j.issn2095-9389.2015.09.019:http://journals.ustb.edu.cn 脱硫灰-FeCl,联合作用改善污泥的脱水性能 陈 巍，陈月，邢奕四，王志强，宋存义 北京科技大学土木与环境工程学院，北京100083 ☒通信作者，E-mail:xing_bkd@163.com 摘要以毛细吸水时间和滤饼含水率为评价指标，研究脱硫灰FCl,对污泥脱水性能的影响.通过污泥各层胞外聚合物含 量的变化以及红外光谱分析，探讨脱疏灰-FCl,调理污泥的作用机理.结果表明：脱硫灰和FCl,对污泥进行联合调理的处理 效果明显好于这两种调理剂单独投加的处理效果.在调理过程中，脱硫灰-FC将大量紧密结合的胞外聚合物剥落，部分转 化为结合度更低的上清液层胞外聚合物和松散结合的胞外聚合物，部分被F(OH),吸附而除去，有效降低毛细吸水时间和滤 饼含水率.Pearson相关性分析表明，紧密结合的胞外聚合物与毛细吸水时间和滤饼含水率均存在显著的正相关性，是影响污 泥脱水性能的重要因素.污泥滤液红外光谱分析表明，脱硫灰一FCl,使胞外聚合物剥落进入上清液的同时水解生成氨基酸、 脂肪酸等小分子有机物.脱硫灰和FeCL的最佳投加量分别为300mg'g·和60mg‘g,毛细吸水时间和滤饼含水率分别降至 14.3s和70.22%，相比于原泥分别降低98.48%和16.10%，脱水性能得到大幅改善. 关键词污泥处理：脱水：脱硫灰：氯化铁：固体废弃物处理 分类号X705 Combined effect of desulfurization ash-FeCl,on sludge dewatering performance CHEN Wei,CHEN Yue,XING Yi,WANG Zhi-giang,SONG Cun-yi School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:xing bkd@163.com ABSTRACT The effects of desulfurization ash and ferric chloride as conditioners on the sludge dewatering performance were investi- gated with the capillary suction time and the water content of the sludge cake as evaluating indicators.Extracellular polymeric substance measurements and Fourier transform infrared spectroscopy were used to analyze the sludge dewatering mechanism.The results show that a significantly better treatment effect can be obtained with desulfurization ash and ferric chloride together than just one conditioner.In the treatment process,a large amount of the tightly bound extracellular polymeric substance is spalled by desulfuriza- tion ash and ferric chloride,in which a part tums into a loosely bound extracellular polymeric substance and a slime extracellular polymeric substance,and the other part is removed by ferric hydroxide,which effectively decreases the water content of the sludge cake and the capillary suction time.Pearson correlation analysis results indicate that the tightly bound extracellular polymeric substance has significant correlation with the capillary suction time and the water content of the sludge cake,so it is an important factor affecting the sludge dewatering performance.Infrared spectrum analysis of the sludge filtrate reveals that hydrolysis happens when the extracellular polymeric substance enters into the sludge supernatant,and the contents of amino acid,aliphatic acid and other small molecule organic matter increase.When the dosages of desulfurization ash and ferric chloride are 300 mg'g and 60mg'g,respec- tively,the capillary sop time and the water content of the sludge cake decrease to the lowest.Their minimum values are 14.3 s and 收稿日期：2014-12-09 基金项目：国家自然科学基金资助项目(51104009)：北京市科技新星计划资助项目(2111106054511043)：北京市优秀人才培养资助项目 (2012D009006000003):中央高校基本科研业务费资金资助项目(FRF-TP-一12011B)工程科学学报，第 37 卷，第 9 期: 1239--1245，2015 年 9 月 Chinese Journal of Engineering，Vol． 37，No． 9: 1239--1245，September 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 09． 019; http: / /journals． ustb． edu． cn 脱硫灰--FeCl3 联合作用改善污泥的脱水性能 陈 巍，陈 月，邢 奕，王志强，宋存义 北京科技大学土木与环境工程学院，北京 100083  通信作者，E-mail: xing_bkd@ 163． com 摘 要 以毛细吸水时间和滤饼含水率为评价指标，研究脱硫灰--FeCl3对污泥脱水性能的影响． 通过污泥各层胞外聚合物含 量的变化以及红外光谱分析，探讨脱硫灰--FeCl3调理污泥的作用机理． 结果表明: 脱硫灰和 FeCl3对污泥进行联合调理的处理 效果明显好于这两种调理剂单独投加的处理效果． 在调理过程中，脱硫灰--FeCl3将大量紧密结合的胞外聚合物剥落，部分转 化为结合度更低的上清液层胞外聚合物和松散结合的胞外聚合物，部分被 Fe( OH) 3吸附而除去，有效降低毛细吸水时间和滤 饼含水率． Pearson 相关性分析表明，紧密结合的胞外聚合物与毛细吸水时间和滤饼含水率均存在显著的正相关性，是影响污 泥脱水性能的重要因素． 污泥滤液红外光谱分析表明，脱硫灰--FeCl3使胞外聚合物剥落进入上清液的同时水解生成氨基酸、 脂肪酸等小分子有机物． 脱硫灰和 FeCl3的最佳投加量分别为 300 mg·g － 1 和 60 mg·g － 1 ，毛细吸水时间和滤饼含水率分别降至 14. 3 s 和 70. 22% ，相比于原泥分别降低 98. 48% 和 16. 10% ，脱水性能得到大幅改善． 关键词 污泥处理; 脱水; 脱硫灰; 氯化铁; 固体废弃物处理 分类号 X705 收稿日期: 2014--12--09 基金项目: 国家自然科学基金资助项目( 51104009) ; 北京市科技新星计划资助项目( Z111106054511043) ; 北京市优秀人才培养资助项目 ( 2012D009006000003) ; 中央高校基本科研业务费资金资助项目( FＲF--TP--12--011B) Combined effect of desulfurization ash--FeCl3 on sludge dewatering performance CHEN Wei，CHEN Yue，XING Yi  ，WANG Zhi-qiang，SONG Cun-yi School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: xing_bkd@ 163． com ABSTＲACT The effects of desulfurization ash and ferric chloride as conditioners on the sludge dewatering performance were investi￾gated with the capillary suction time and the water content of the sludge cake as evaluating indicators． Extracellular polymeric substance measurements and Fourier transform infrared spectroscopy were used to analyze the sludge dewatering mechanism． The results show that a significantly better treatment effect can be obtained with desulfurization ash and ferric chloride together than just one conditioner． In the treatment process，a large amount of the tightly bound extracellular polymeric substance is spalled by desulfuriza￾tion ash and ferric chloride，in which a part turns into a loosely bound extracellular polymeric substance and a slime extracellular polymeric substance，and the other part is removed by ferric hydroxide，which effectively decreases the water content of the sludge cake and the capillary suction time． Pearson correlation analysis results indicate that the tightly bound extracellular polymeric substance has significant correlation with the capillary suction time and the water content of the sludge cake，so it is an important factor affecting the sludge dewatering performance． Infrared spectrum analysis of the sludge filtrate reveals that hydrolysis happens when the extracellular polymeric substance enters into the sludge supernatant，and the contents of amino acid，aliphatic acid and other small molecule organic matter increase． When the dosages of desulfurization ash and ferric chloride are 300 mg·g － 1 and 60 mg·g － 1 ，respec￾tively，the capillary sop time and the water content of the sludge cake decrease to the lowest． Their minimum values are 14. 3 s and