https://scholars.lib.ntu.edu.tw/handle/123456789/407799
標題: | Normal stress of wastewater sludge | 作者: | Yen P.-S. Lee D.-J. You X.-Y. |
關鍵字: | Normal stress, Flocculation, Visco-elastic, Shear | 公開日期: | 2004 | 卷: | 35 | 期: | 5 | 起(迄)頁: | 581-586 | 來源出版物: | Journal of the Chinese Institute of Chemical Engineers | 摘要: | Shear stress and total thrust on the bottom plate for wastewater sludge subjected to shear were measured using an AR1000-N rheometer. Wastewater sludges are demonstrated not only a non-Newtonian fluid, but also a visco-elastic fluid. Before the stress reaching the peak stress, the wastewater sludge is not really flowable at shearing. But the sludge exhibits a rather low normal stress. The unsheared sludge is resistant to shearing but is readily normally elongated. After sufficient shearing, the sheared sludge exhibits a low viscosity, meanwhile, the corresponding normal stress has been increased to a high value. Sufficiently sheared sludge is relatively easy to shear, but very resistant to normal elongation. This occurrence is attributable to the development of elasticity of the sludge network during shearing. Adding cationic polyelectrolyte into sludge could enhance its network strength to resist both plastic and elastic deformation. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407799 | ISSN: | 03681653 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。