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Rotary Vacuum Drum Filters
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Vacuum filtration has been in use for sludge dewatering for more than 70 years. Its simple operation, low maintenance, versatility in effectively dewatering a wide variety of materials provides a relatively cost-effective dewatering method.
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In a rotary vacuum drum filter, a porous media or filter cloth is supported by the cylindrical drum surface and passes through the sludge vat while the partially submerged drum rotates under applied vacuum (negative pressure). The slurry is sucked from the vat with the liquid passing through the media and the solids retained on the media. The liquid is collected through a series of internal piping and valve arrangement, while the dewatered solids are scraped off the surface of the media.
Auxiliary equipment including agitator, vacuum pump, vacuum receiver, filtrate pump, cake discharge mechanism, sludge conveyor, and feed/conditioning tank are vital to its operation.
Bench Vacuum Test Apparatus
Sciential's bench-scale vacuum filter test kits are used to conduct tests on a variety of waste streams. Typical applications include:
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Municipal Wastewater |
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Refinery |
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Industrial Wastewater |
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Cooling Water |
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Chemical |
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Ballast Water Treatment |
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Power |
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Water |
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Minerals |
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Food Processing |
The use of the bench unit has been utilized as a tool to optimize the full-scale vacuum filter operation or determine the full-scale vacuum filter unit. The use of the bench test unit will aid in determining the cake solids concentration, filtrate clarity, form cycle, dry cycle, chemical type, chemical dosage, mixing intensity, and mixing duration.
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