| 过量生石灰对污泥含水率和有机物含量的影响 |
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| 引用本文： | 周宏仓,徐露,周云桥,何都良,章文斌,查键,聂东阳.过量生石灰对污泥含水率和有机物含量的影响[J].环境工程学报,2013,7(2):717-721. |
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| 作者姓名： | 周宏仓 徐露 周云桥 何都良 章文斌 查键 聂东阳 |
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| 作者单位： | 南京信息工程大学环境科学与工程学院,江苏省大气环境监测与污染控制高技术研究重点实验室,南京210044 |
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| 基金项目： | 江苏省高校科研成果产业化推进项目(JHB2011-14);江苏省"青蓝工程"中青年学术带头人项目;江苏省高校自然科学基金项目(10KJB610007);江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 为了研究生石灰(氧化钙,CaO)处理活性污泥对污泥含水率和有机物含量的影响,通过向南京某城市污水处理厂出厂污泥投加过量CaO进行脱水实验,测定投加CaO后污泥的含水率;烘干后的脱水污泥进行热重实验,研究CaO投加量对污泥中有机组分含量的影响.脱水实验表明:随着CaO与污泥质量比的增大,污泥含水率迅速减小,当质量比达到1.5时,污泥达到完全脱水;投加过量CaO的脱水污泥呈干燥的粉末状,粒度均匀,可作为水泥生产的辅料。热重实验表明:投加CaO后单位干泥失重百分比随CaO与污泥质量比增大而逐渐减小,向污泥中投加CaO有利于污泥中有机组分的释放和去除,实现污泥的稳定化。
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| 关 键 词： | 污泥 生石灰(氧化钙) 含水率 有机物 |
Effect of adding excessive lime on moisture content and organic matter content in sludge |
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| Zhou Hongcang,Xu Lu,Zhou Yunqiao,He Duliang,Zhang Wenbin,Zha Jian and Nie Dongyang.Effect of adding excessive lime on moisture content and organic matter content in sludge[J].Techniques and Equipment for Environmental Pollution Control,2013,7(2):717-721. |
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| Authors: | Zhou Hongcang Xu Lu Zhou Yunqiao He Duliang Zhang Wenbin Zha Jian and Nie Dongyang |
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| Institution: | Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | To study the effect of adding excessive lime (calcium oxide) on the moisture content and organic matter content in sludge, the dewater experiment of sludge by adding excessive calcium oxide and the thermogravimetric experiment of dried dewater sludge were conducted. The moisture content of mixture of sludge and calcium oxide was detected, and the effects of calcium oxide amount on the organic matter content of in dried dewater sludge were studied. The dewater experiment shows that the moisture content of dewater sludge reduces quickly with the increasing of the mass ratio of calcium oxide to sludge, and the sludge is completely dehydrated at the mass ratio of 1.5. The dried dewater sludge with excessive calcium oxide is uniform in particle size, and can be used as the cement raw material. The thermogravimetric experimental results show that the weight loss percentage of unit dried dewater sludge decreases with the increase of the ratio of calcium oxide to sludge, which indicates that calcium oxide is of benefit to releasing and removal of organic matters from sludge and realizing the stabilization of sludge. |
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| Keywords: | sludge lime (calcium oxide) moisture content organic matter |
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