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  • Drying Technology for Sewage Sludge


    Specialist in thermal separation and membrane technology


  • Horizontal Thin Film Dryer


    Wet sludge

    Horizontal Thin Film Dryer

    Co nd

    en se


    Heating medium

    Cooling water

    Heating medium

    Dried Sludge Cooler

    Cooling water

    Dried sludge

    to waste water treatment

    Effluent from waste water


    Exhaust Buss-SMS-Canzler sludge drying process

    Buss-SMS-Canzler drying technology, and in particular the Horizontal Thin Film Dryer has been supplied and successfully operated in the field of sludge drying for more than 25 years. This technology has been well proven in a large number of drying plants, and we have supplied plants with throughputs of up to 800 wet tons per day.

    Horizontal Thin Film Dryer Horizontal Thin Film Dryers are continuously operat- ing contact dryers. The dryer vessel consists of a cylin- drical shell and end covers, the vessel is provided with an external heating jacket. Internally an agitator is provided with demountable blades bolted to the agi- tator. The agitator is supported at both ends by exter- nal bearings. The drive system is externally mounted.

    The agitator blades maintain a thin layer of product on the heated walls, and convey the product along the heated vessel walls to the discharge nozzle. Vapours pass counter currently to the product flow, and are discharged through a vapour nozzle adja- cent to product feed nozzle.

  • 1-stage drying

    Buss-SMS-Canzler Sludge Drying Process


    Dry solid content of 35 - 50%

    • Solid fuel for fluidised bed incinerators

    The Thin Film Dryer offers an ideal solution for drying of municipal and industrial sludges to intermediate or high dry solid levels. The Buss-SMS-Canzler Thin Film Dryer can provide a fully dried product in various forms, suit- able for the final purpose either in a single stage or in combination with a segmented disc dryer type Linear Dryer or Rovactor®.

    Dry solid content of 50 - 70%

    • for combined incineration with garbage

    • biosolids to mineral treatment, composting or landfill


    Specialist in thermal separation and membrane technology

  • 2-stage drying system - full drying The Linear Dryer is a perfect solution for drying the pre- dried granules from the Thin Film Dryer up to 90% dry solids. The Linear Dryer is a heated U-type conveyor with a slow moving, heated shaft with specially designed transport scoops. The slow rotation of the impeller in combination with a relatively low filling height ensures gentle movement and transportation of the granules.

    2-stage drying

    Biosolids “Class A” granules for agricultural use, for composting

    and for soil reclamation

    Thermal utilisation • As solid fuel for cement kilns or for coal fired power stations

    • For pyrolisis, gasification or other conversion processes

    FULL DRYING 85 to 95% dry solid

  • Buss-SMS-Canzler

    Thin Film Dryer

    Liquid sludge

    Mechanical dewatering

    Sludge feeding

    Drying (1st-stage; optional 2nd-stage)

    Various end disposal routes

    Condensation with heat recovery and off-gas treatment

    Thin Film Dryer type NDS

    Heating medium

    35 to 70 % DS

    50 to 70 % DS

    Alternative fuel Incineration in fluidised bed Incineration with garbage

    Bio solids Mineral Treatment Composting Landfill

    Solid fuel for cement kiln

    Solid fuel for coal- fired power station

    Granules for Agricultural use

    Gasification Pyrolysis

    90 %




    Belt filter


    - Steam - Hot water - Diathermic oil


    Second stage Dryer 1)

    90 %


    Heating medium

    Heat recovery by sludge preheating

    1) Segment disc dryer type Linear Dryer or Rovactor

    Hot water

    to WWTP Effluent from


    to WWTP

    Incondensables to: - Boiler - Incinerator - Biofilter - Bioscrubber

    Recovery of heat

    The following graph gives an overview of the custo- mized Buss-SMS-Canzler sludge drying systems and how they can be integrated in the overall biosolid disposal process.


    Specialist in thermal separation and membrane technology

  • Advantages of Buss-SMS-Canzler Sludge Drying Technology

    Head Office & Workshop Buss-SMS-Canzler GmbH Kaiserstraße 13-15 D-35510 Butzbach Tel : +49 60 33 - 85 - 0 Fax: +49 60 33 - 85 - 249

    Branch Office & Test Center Buss-SMS-Canzler GmbH Hohenrainstraße 10 CH-4133 Pratteln 1 Tel : +41 61 82 - 56 - 869 Fax: +41 61 82 - 56 - 766

    Email: info@sms-vt.com www.sms-vt.com

    Branch Office Buss-SMS-Canzler GmbH Am Langen Graben 7 D-52353 Düren Tel : +49 24 21 - 705 -1 Fax: +49 24 21 - 705 - 80


    Specialist in thermal separation and membrane technology



    • single pass operation over the sticky or pasty phase; hence no back mixing of dried product

    • contact drying without using sweeping air /gas • no special preconditioning of the wet sludge


    • minimum energy consumption • integrated heat recovery (optional) • self cleaning heat exchange surface • short start-up and shut down time • low maintenance costs • minimum supervision


    • applicable to all types of sludges • suitable for any initial dry solid content • any final dry solid content • different heating media • single stage or two stage operation

    Ecological and Safe

    • enclosed system under slight negative pressure • self inertisation by the evaporated water


    • more than 80 sludge drying installations • references worldwide (Europe, USA, China, Arabia ...) • dryers in operation for more than 20 years

    Drying Sewage.pdf 1 2 3 4 5 6 Drying Sewage.pdf 1 2 3 4 5 6

    Drying Sewage.pdf 1 2 3 4 5 6

    Drying Sewage.pdf 1 2 3 4 5 6

    Drying Sewage.pdf 1 2 3 4 5 6

    Drying Sewage.pdf 1 2 3 4 5 6


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