Belt Filter Press...

Definition...

A belt filter press is a bio-solids / sludge dewatering device that applies mechanical pressure to a chemically conditioned slurry, which is sandwiched between two (2) tensioned belts, by passing those belts through a serpentine of decreasing diameter rolls. The machine can actually be divided into three (3) zones: gravity zone, where free draining water is drained by gravity through a porous belt; wedge zone, where the solids are prepared for pressure application; and pressure zone, where medium, then high pressure is applied to the conditioned solids. Typically, a belt filter press receives a slurry ranging from 1 - 4 % feed solids and produces a final product of 12 - 35 % cake solids. Performance depends on the nature of the solids being processed.

Typical Applications...

• Municipal
  
  
  • Raw
    • Primary
    • Primary & Trickling Filter
    • Primary & WAS
    • WAS
    • Contact Stabilization
    • Primary & RBC
      
      
  • Anaerobically Digested
    • Primary
    • Primary & Trickling Filter
    • Primary & WAS
    • Primary & RBC
      
      
  • Aerobically Digested
    • Oxidation Ditch
    • Primary & Activated
    • Contact Stabilization
    • Extended Aeration
    • Primary & RBC
    • WAS
      
      
  • Potable Water Plant
    • Alum Sludge
    • Lime Softening Sludge
    • River Water Silt
      
      
• Industrial
  
  
  • Food Processing Wastes
  • Pulp & Paper Wastes
  • Chemical Sludges
  • Pharmaceutical Wastes
  • Industrial Waste Processing Sludges
  • Petrochemical Wastes

Gravity Zone...

The Roto-Kone technology was developed for enhancing the performance (higher production rates at higher thickened sludge solids) of our gravity belt thickener. However, its application in the gravity section of a belt press enhances belt press performance also by creating more residence time in the gravity zone thereby providing for greater drainage capabilities and higher solids concentrations at discharge. Other belt presses having standard plow systems cannot achieve equal production capabilities.

Wedge Zone...

The adjustable wedge and the large initial dewatering drum provide a gradually applied gentle introduction of the sludge into the pressure zone which prevent migration of the sludge beyond the belt edges which can occur on the conventional press at this point. Because of its large diameter, large belt wrap and perforated, self-bailing design, the initial drum extracts more water from the sludge at the inlet to the pressure/shear zone than does the conventional press and because of its internal baffle design prevents the rewetting of cake on the bottom half of the roll.

Pressure Zone...

Finally, the extra long pressure/shear section provides more belt area in contact with dewatering drums and thus provides more time under pressure for more thorough dewatering than other presses of its type.