Investigation of the shape change of bio-flocs and its influence on mass transport using particle image velocimetry
文献类型：期刊论文
| 作者 | Ren, T. T. ; Xiao, F. ; Sun, W. J. ; Sun, F. Y. ; Lam, K. M. ; Li, X. Y. |
| 刊名 | WATER SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 69期号:8页码:1648-1652 |
| 关键词 | bio-flocs mass transfer particle image velocimetry (PIV) permeability shape change |
| ISSN号 | 0273-1223 |
| 中文摘要 | In this laboratory study, an advanced flow visualization technique - particle image velocimetry (PIV) - was employed to investigate the change of shape of activated sludge flocs in water and its influence on the material transport characteristics of the flocs. The continuous shape change of the bio-flocs that occurred within a very short period of time could be captured by the PIV system. The results demonstrate that the fluid turbulence caused the shift of parts of a floc from one side to the other in less than 200 ms. During the continuous shape change, the liquid within the floc was forced out of the floc, which was then refilled with the liquid from the surrounding flow. For the bio-flocs saturated with a tracer dye, it was shown that the dye could be released from the flocs at a faster rate when the flocs were swayed around in water. The experimental results indicate that frequent shape change of bio-flocs facilitates the exchange of fluid and materials between the floc interior and the surrounding water. This mass transfer mechanism can be more important than molecular diffusion and internal permeation to the function and behavior of particle aggregates, including bio-flocs, in natural waters and treatment systems. |
| WOS记录号 | WOS:000335976700009 |
| 公开日期 | 2015-03-24 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9394]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ren, T. T.,Xiao, F.,Sun, W. J.,et al. Investigation of the shape change of bio-flocs and its influence on mass transport using particle image velocimetry[J]. WATER SCIENCE AND TECHNOLOGY,2014,69(8):1648-1652. |
| APA | Ren, T. T.,Xiao, F.,Sun, W. J.,Sun, F. Y.,Lam, K. M.,&Li, X. Y..(2014).Investigation of the shape change of bio-flocs and its influence on mass transport using particle image velocimetry.WATER SCIENCE AND TECHNOLOGY,69(8),1648-1652. |
| MLA | Ren, T. T.,et al."Investigation of the shape change of bio-flocs and its influence on mass transport using particle image velocimetry".WATER SCIENCE AND TECHNOLOGY 69.8(2014):1648-1652. |
入库方式： OAI收割
来源：生态环境研究中心
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