| Ultrasonic Enhancement of Industrial Sludge Settling Ability and Dewatering Ability |
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| 作者姓名： | 张光明 张盼月 陈言明 |
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| 作者单位： | Shenzhen Graduate School Tsinghua University Shenzhen 518055 China，Department of Environmental Science and Engineering Hunan University Changsha 410082，China，School of Architecture and Resource Nanhua University，Hengyang 421001 China |
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| 基金项目： | SupportedbytheNationalHigh-TechResearchandDevelopment(863)ProgramofChina(No.2002AA601120) |
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| 摘 要： | Introduction Today,sludge management represents a major invest-ment due to the high operating costs and presents many important technical challenges.The associated capital and operating costs may be as high as25%-50%of the total cost of the wastewater tre…
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| 关 键 词： | 超声波 工业污泥 污泥量 铬 沉淀能力 脱水能力 |
| 收稿时间： | 2004-10-11 |
| 修稿时间： | 2004-10-112004-12-01 |
Ultrasonic Enhancement of Industrial Sludge Settling Ability and Dewatering Ability |
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| ZHANG Guangming,ZHANG Panyue,CHEN Yanming.Ultrasonic Enhancement of Industrial Sludge Settling Ability and Dewatering Ability[J].Tsinghua Science and Technology,2006,11(3):374-378. |
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| Authors: | ZHANG Guangming ZHANG Panyue CHEN Yanming |
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| Institution: | 1.Shenzhen Graduate School, Tsinghua University, Shenzhen 518055, China;2.Department of Environmental Science and Engineering, Hunan University, Changsha 410082, China;3.School of Architecture and Resource, Nanhua University, Hengyang 421001, China |
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| Abstract: | This paper investigates the treatment of chromium (Cr) contaminated industrial sludge from a tan-ning process with ultrasound to enhance the sludge settling ability and dewatering ability. Ultrasound at various frequencies, intensities, and time was tested to optimize the operation. The results show that treat-ment with 30 kHz, 12 W/L ultrasound for 120 s shortened the sludge settling time from 3 h to 1 h and re-duced the supernatant Cr concentration. The ultrasonic treatment also reduced the sludge volume from 4.02 mL/g to 2.58 mL/g and increased the sludge Cr concentration by 2/3. The treated sludge could then be re-used in the tanning operation. Proper ultrasonic treatment can significantly reduce the sludge volume and enhance the Cr reuse. |
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| Keywords: | ultrasound industrial sludge sludge volume Cr |
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