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HUBER Belt Thickener DrainBelt Belt thickener for highly efficient sludge thickening

  • Very low polymer consumption
  • High throughput capacity
  • Reliable operation

 

The purpose of sewage sludge thickening

Sewage sludge, particularly secondary sludge, is charac­terised by low solids concentrations and therefore big vo­lumes. Good sludge thickening is required as a prerequi­site for the efficient further treatment of sewage sludge, for example in digesters, and is also necessary where liquid sewage sludge is transported to further treatment steps or utilisation.

The following criteria are decisive for the selection of the thickening process:

  • Efficiency
  • Performance
  • Reliability
HUBER Belt Thickener DrainBelt
HUBER Belt Thickener DrainBelt
HUBER Belt Thickener DrainBelt for 60 m³ thin sludge per hour
HUBER Belt Thickener DrainBelt for 60 m³ thin sludge per hour
HUBER Belt Thickener DrainBelt with big inspection openings to facilitate maintenance
Thickening of dairy sludge
Thickening of dairy sludge
Chicanes furrow the sludge to facilitate drainage and support the production of a concentrated sludge cake
Chicanes furrow the sludge to facilitate drainage and support the production of a concentrated sludge cake
Belt washing with filtrate water as spray water
Belt washing with filtrate water as spray water
HUBER Belt Thickener DrainBelt with inspection openings open
HUBER Belt Thickener DrainBelt for up to 100 m³/h thin sludge
HUBER Belt Thickener DrainBelt for up to 100 m³/h thin sludge
HUBER Belt Thickener DrainBelt with throughput capacity up to 45m3/h per metre of filter belt width
Mobile containerised demo unit
Mobile containerised demo unit
View into the filtrate chamber
View into the filtrate chamber
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Design sketch: HUBER Belt Thickener DrainBelt
Design sketch: HUBER Belt Thickener DrainBelt

Design and Function

Design sketch: HUBER Belt Thickener DrainBelt
Design sketch: HUBER Belt Thickener DrainBelt

    Polymer is added to the thin sludge and the sludge condi­tioned in a flocculation reactor prior to being distributed evenly over the full width of the continuously travelling filter belt.

    The water filtered through the belt filter cloth drains off into collection troughs whilst the solids are retained on the filter belt.

    Chicanes furrow the sludge to facilitate drainage and support the production of a concentrated sludge cake. The initial thin sludge volume is reduced by approx. 85 %.

    The sludge cake is dischar­ged into a collection trough from where it is removed by an eccentric screw pump for example. A spray bar cleans the filter belt while it travels back.

    The benefits of the HUBER Belt Thickener DrainBelt

    Efficiency
    • Sludge volume reduction up to > 85%
    • Typical thickening results > 6% DR
    • Minimised polymer consumption, normally only 2 – 3 g effective substance/kg DM
    • Low energy consumption
    • Belt filter cleaning with filtrate water as spray water
       
    Reliable technology
    • Long filter cloth life due to the slow filter belt velocity of < 20 m/min
    • Minimised wear of the plastic chicanes
    • Encased thickener suitable for the treatment of strong-smelling sludge, protecting operators against harmful spray water aerosols
    • Big inspection openings to facilitate maintenance
    • Easy to operate and maintain
    High performance
    • Large active filter surface
    • Very long thickening zone
    • Increased filtration results through repeated sludge restacking
    • Increased thickening results due to a ramp installed to decelerate the sludge prior to being discharged
    • Selectable filter cloth options to meetspecific requirements
    • High specific throughput capacity up to 45m3/h per metre of filter belt width

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    Case Studies

    HUBER Solutions in Operation

    Cannock STW installation with HUBER Sludgecleaner STRAINPRESS®
    2020-08-03 Cannock STW, UK

    A HUBER Technology Wastewater Case Study at Cannock STW for Severn Trent Water

    HUBER Technology recently completed a project for Severn Trent Water at Cannock STW, north of Birmingham. HUBER...

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