Characterization of floc structure and strength: Role of changing shear rates under various coagulation mechanisms
文献类型：会议论文
| 作者 | Wang, Dongsheng; Wu, Ruobing; Jiang, Yunzhong; Chow, Christopher W. K. |
| 出版日期 | 2011 |
| 会议名称 | 6th International Conference on Interfaces Against Pollution (IAP 2010) |
| 会议日期 | MAY 16-19, 2010 |
| 会议地点 | Beijing, PEOPLES R CHINA |
| 关键词 | Fractal dimension Flocculation Floc strength Size distribution Shear rate |
| 英文摘要 | The floc formation, structure and strength remain a problematic topic to be addressed clearly to guide the flocculator design. To study the relationship among floc structure, strength, size distribution, and fractal dimensions, the alum-kaolin flocs formed under different coagulation stages and mechanisms were investigated at various agitation rates. A new method based on the fractal theory was employed to analyze the strength of flocs. The relationship between fractal dimensions and floc size distribution was then discussed with controlled experiments, providing comparison between calculation results of the new method and the strength factor as well. The results show that both size and fractal dimension of flocs decrease with increasing shear rate. The floc strength follows the hierarchy: gradually increased shear rate from 40 rpm to 60 rpm > stable 60 rpm shear rate > gradually decreased shear rate from 60 rpm to 40 rpm > stable 40 rpm shear rate. Flocs formed under gradual shear increasing could easily re-flocculate and recover their strength after breakage. (C) 2010 Elsevier B.V. All rights reserved. |
| ISBN号 | 0927-7757 |
| WOS记录号 | WOS:000289920200008 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24624]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Dongsheng,Wu, Ruobing,Jiang, Yunzhong,et al. Characterization of floc structure and strength: Role of changing shear rates under various coagulation mechanisms[C]. 见:6th International Conference on Interfaces Against Pollution (IAP 2010). Beijing, PEOPLES R CHINA. MAY 16-19, 2010. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。