https://scholars.lib.ntu.edu.tw/handle/123456789/408423
Title: | Interaction of ice-water interface with agglomerates of activated sludge during freezing | Authors: | Tao T. Peng X.F. Chu C.P. Lee D.J. |
Keywords: | Freezing;Moving interface;Sludge management;Visualization | Issue Date: | 2003 | Journal Volume: | 2003 | Start page/Pages: | 541-545 | Source: | ASME Summer Heat Transfer Conference | Abstract: | Visual experiments were conducted to investigate freezing behavior of activated sludge. Experimental observations indicate that there existed strong interactions of advancing ice-liquid interface with sludge agglomerates during freezing treatment. Agglomerates would be pushed to move by advancing ice-liquid interface in the cases of lower advancing speeds while no needle-like ice-crystals forming at the interface. For faster freezing processes, the ice front interface line turned needle-like, while ice-crystals forming/generating at the interface, and crystals pierced into the sludge agglomerates rather than pushing them. The crystals served as roles holding the agglomerates. It seems that there was a critical speed below which repulsion occurred and above which the particles were entrapped without obviously pushing. The transition of these two cases is still needed to identify. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408423 | ISBN: | 9780791836934 |
Appears in Collections: | 化學工程學系 |
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