Biosolids Dewatering

  • Charter Machine Company
  • Fournier
  • Flottweg
  • Faure

 Charter Machine Company

Gravity Belt Thickener

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Charter Machine Brochure Charter Machine Brochure (369 KB)


Fournier Rotary Press

The Fournier Rotary Press is at the forefront of innovation for municipal and industrial sludge dewatering.

Rotary Drum PressRotary Drum Press


Sludge is fed into a rectangular channel, and rotates between two parallel revolving stainless steel chrome plated screens. The filtrate passes through the screens as the flocculated sludge advances within the channel.  The sludge continues to dewater as it travels around the channel, eventually forming a cake near the outlet side of the press.

The frictional force of the slow moving screens, coupled with the controlled outlet restriction, results in the extrusion of a very dry cake.

A unique feature of the Rotary Press is the ability to order units that can be expanded by adding additional channels at a future date.  This allows for a clients to benefit from a lower capital investment and flexibility with expansion as the need arises.  Any combination of channels can be obtained, up to a maximum of 6 channels per machine.

New CV-Optimum Press

The Fournier CV-Optimum Rotary Dewatering Press is the latest development in the 20 year history of the technology.  Units are now manufactured with a 36” diameter dewatering channel that far surpasses the performance of earlier versions. 

Features and Benefits:

  • Totally enclosed
  • Low odour levels
  • Slow rotation speed
  • Little maintenance
  • Low power consumption
  • Small footprint
  • Consistently high cake dryness
  • Simple operation that requires very little supervision
  • Automated self-cleaning cycle
  • Easily expandable


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    Fournier - Rotary Press Fournier - Rotary Press (5617 KB)




    Solids Dewatering Centrifuge

    The most critical factor in the dewatering process is achieving maximum cake dryness. After this, other factors are cost efficiency in terms of polymer consumption, energy, water and spare parts, as well as continuous, automatic operation at minimal costs. 

    The result of continuous development taking all these critical design features into account is FLOTTWEG HTS DECANTER portfolio which includes equipment to handle capacities of 10 - 180 m3/h (40 - 800 gpm).

     Feed (solids)                    2 - 6 %
     Product (solids)        25 - 35 %              

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    Flottweg - Decanters Flottweg - Decanters (2823 KB)


    Faure TITAN Filter Press

    The Faure Plate & Frame Filter Press is a leading mechanical dewatering system. The filter press is one of the oldest mechanical dewatering devices - Faure has been manufacturing machines since 1868, and manufactured their first filter press in 1890 – since then there has been much innovation to the technology. 


    Filter Presses comprise a set of plates covered with filter cloths, creating water tight chambers into which the product to be filtered is injected under pressure.  Under this pressure, the liquids pass through the cloths, which retain the solid particles.  The filtrates are evacuated throughout the pressing cycle.  The cakes that form between the plates are released in the discharge phase. 

    Membrane plate (mixed pack) technology combines the conventional filtration phase with a compression phase at the end of the pressing cycle.  Membrane filter press technology improves filter press productivity by 20 to 50% and increases the dryness of the cake.

    Cake discharge is automated, using combined shaking and automatic weight-monitoring systems developed by Faure.

    Features and Benefits

  • Simplicity, robustness, reliability
  • 100% automatic operation – cakes are discharged without operator intervention
  • Automatic high pressure cloth washing
  • Flexible operation
  • High cake dryness achieved – 30 – 80% TS
  • Low operating and maintenance costs
  • Easily adaptable to different effluent treatment methods
  • Excellent capture rate

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