Analysis of centrifugal dewatering: consolidation behaviour with and without supernatant
Centrifugal dewatering is one of the effective methods for solid-liquid separation. Although it is used in many industrial processes, the dewatering process is difficult to analyse because various factors influence the process. In most of the centrifugal dewatering cases, the solid-liquid i...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/34584/ http://irep.iium.edu.my/34584/ http://irep.iium.edu.my/34584/1/FILTECH2013_Fukuyama20130627_Jami_2.pdf |
| Summary: | Centrifugal dewatering is one of the effective methods for solid-liquid separation. Although it is used in many industrial processes, the dewatering process is difficult to analyse because various factors influence the process.
In most of the centrifugal dewatering cases, the solid-liquid interface appears as soon as the centrifugal dewatering begins. The details of the dewatering process are as follows:
1. When the dewatering begins, the solid-liquid interface appears and it settles down dramatically. The supernatant can be observed on the top of the sludge layer.
2. The supernatant continues to permeate through the sludge layer even after the height of sludge achieves equilibrium.
3. At the same time as the supernatant disappears, consolidation of the upper sludge restarts due to the existence of meniscus at the sludge surface.
4. The height of sludge achieves equilibrium again.
This study investigates the centrifugal dewatering of thick suspensions in consolidation region. The process noted above can be simulated using the basic consolidation equation.
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