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. In a rotary vacuum drum filter, a porous media or filter cloth is supported by the cylindrical drum surface and passes through... 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...

Filters Since the 1960s, belt press units have been extensively used in applications where the solids in the slurry are relatively fine and more difficult to dewater. In... applications that require continuous dewatering, belt press units can be used to replace plate-and-frame type pressure filters. Pretreated (chemically conditioned) feed sludge is introduced... wedge zone where the sludge is trapped between the upper and lower belts. As the belts converge on the initial contact point of the first pressure roll, the sludge is dewatered...

dewatering, high pressure is directly applied to the sludge against a porous media supported by a plate. Typical pump pressures range from 100 psi to 225 psi. As the pump develops...