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Passavant Gravity Thickener

Passavant® Gravity Thickener offers a particularly economic solution for the mechanical thickening process. The robust, tried and tested gravity thickeners are designed for a maximum pressure of 0.58 psi on the bottom scraper blades which enables sludge thickening of up to 600 g/l (80 oz/gal), depending on the type of sludge.

Unique Selling Point

  • Energy efficient due to lower energy demand
  • Low wear and tear as only slow-running components
  • Low maintenance as no bearings below the waterline
  • Reliable operation due to electronic overload protection with motor management
  • Replacement of drive parts possible for operation without tank drainage
  • Long service life of ball bearing slewing ring due to forced lubrication


    The raw, mixed or digested sludge flows into the circular tank through a centrally positioned, rotating distributor cylinder. The subsequent thickening process is intensified by means of the vertically mounted stirring members. The sludge in the bottom area, which has the highest thickness concentration, is conveyed by the echelon-type scraper blade assembly into the sludge hopper, from where it is drawn off by hydrostatic pressure or respectively pumped off to further treatment facilities.

    Depending on the mode of operation, the supernatant is drawn, continuously or discontinuously, from the surface via overflow weir on an outlet channel or via height adjustable or floating supernatant outlets.

    For more information on the Passavant® Gravity Thickener, please view the flyer or contact us.


    Sludge Thickening

    Sewage sludge is continuously produced in the course of wastewater clarificationprocesses, which is either utilized in further processing or disposed of. A rapid concentration of the solids and a reduction of the sludge volume are the...


    Locations and Contact


    Aqseptence Group Carpi Srl, Limidi

    Sales and Manufacturing Location
    Via Pitagora 30
    41010 Limidi Di Soliera, MO

    Tel: +39 059 525720

    Fax: +39 059 525443



    Aqseptence Group GmbH, Aarbergen

    Sales and Manufacturing Location
    Passavant-Geiger-Strasse 1
    65326 Aarbergen

    Tel: +49 6120 280

    Fax: +49 6120 28 2182


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