Dead-End Filtration Method
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The dead-end filtration method used with the DWR1721 has the following advantages: the collection rate is high (almost 100%); miniaturization is possible; the cost is low; and backwashing and chemical cleaning are not required.
In addition, by optimizing the materials and design, the filter's lifespan is extended.
On the other hand, with the cross-flow filtration method used in conventional deionized water recycling units, filter maintenance does not have to be done often, but there are disadvantages such as the low collection rate and high cost. |
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Outline |
Advantages |
Disadvantages |
| Dead-end (total) filtration |
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• High collection rate (almost 100%)
• Miniaturization possible
• Low cost
• Backwashing and chemical cleaning not required |
• Filters must be replaced often
• Cannot be used if large amounts of insoluble materials are present |
| Cross-flow filtration |
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• Low filter maintenance frequency
• Can be used even if large amounts of insoluble materials are included
• Can be used for viscous liquids as well
• Can be reused with backwashing and chemical cleaning |
• Low collection rate
-Due to separation into filtered water and concentrated water
• Treatment of concentrated water required
• Unit is large and complicated
• Relatively high cost |
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