Bag dehydrator (model RUMDEG-B) is designed to reduce the amount of sludge (primary or stabilized) from domestic, storm and industrial wastewater treatment plants by reducing its moisture content.

Plants allow reducing the sludge moisture:

  • within a 24 hour dehydration cycle- by 20%;
  • within 40-60 days- by 40% (for example, during storage in the open air).
Обезвоживатель мешковый RUMDEG-B


The plant is a system consisting of the following nodes:

  • frame
  • reception chamber;
  • switch distribution gear;
  • filter bag;
  • centrifuge collection tray;
  • protective cover with hinged doors.

All parts are made of aisi304 stainless steel (aisi304L, aisi316, aisi316Lon request), processed by etching in an acid solution. aisi304 (aisi304L, aisi316, aisi316L по запросу), обработанной травлением в кислотном растворе.

The plant is equipped with mounting supports on the floor and swing doors to prevent contaminants from leaving the plant.

The bags are fastened on their necks with quick-release stainless steel clamps.

Обезвоживатель мешковый RUMDEG-B
Обезвоживатель мешковый RUMDEG-B
Обезвоживатель мешковый RUMDEG-B
Обезвоживатель мешковый RUMDEG-B


Sediment is supplied recurrently to the plant receiving chamber. From the receiving chamber, by opening the corresponding shutoff valves, the sediment is distributed through the filter bags for dehydration. Filtered water (centrate) drains from the bags into the lower pan, from where it is discharged through the pipeline.

To prevent overflow of the receiving chamber in the event of bags overfilling, a fitting is provided for connecting the bypass pipeline.

After reducing the amount of sediment in the filter bag by half, the original precipitate is again fed into the bag. After the filter cycle is completed, the operator removes the bags, having previously tied the necks with a tourniquet, and installs new ones.

Bags filled with compacted sediment are removed for drying indoors or outdoors in a designated place equipped with pallets. Dried sludge with cake humidity of about 60% is removed from the bags to the place of disposal, depending on the hazard class.

To improve the moisture-removing properties of the sludge and increase the efficiency of dehydration, it is recommended that a reagent solution is added to the sludge.

The preparation and dosing of the reagent solution in the mixing unit are carried out using the preparation station and the metering pump.

The reagent is mixed with the precipitate, usually in a tubular flocculator installed in front of the receiving chamber.


  • Low cost;
  • High reliability due to the absence of rotating parts;
  • Filter bags have high strength, resistance to damage, inability to silt, inability to decompose;
  • Easy to use;
  • Well thought-out ergonomics: the plant is easy to maintain, accessibility of the main components.


  • if necessary, pressure discharge of filtered water is completed with a tank with a pump and a level sensor;
  • level sensor in the receiving chamber for signalling and preventing overflow;
  • preparation and dosing of a reagent solution plant;
  • system for mixing the precipitate with a reagent solution (flocculator);
  • to maintain the bags in an upright position, it is possible to complete the installation with a support frame system that allows you to evenly fill the bag and protects it from deformation and bulging;
  • trolley for transporting bags to the storage site.


ModelQuantity x bag's volumeAmount of dehydrated sludge per cycle, m3

The values given are approximate and depend on the quality of the sludge to be dehydrated.

For aerobically stabilized sludge with a solids content of 10 mg/l.


ModelQuantity x bag's volumeГабаритный размер L x B x H, мм
RUMDEG-11х50l600 х 650 х 1990
RUMDEG-22х50l1050 х 650 х 1990
RUMDEG-33х50l1500 х 650 х 1990
RUMDEG-44х50l1950 х 650 х 1990
RUMDEG-55х50l2400 х 650 х 1990
RUMDEG-66х50l2850 х 650 х 1990

It is possible to manufacture plants for any required number of bags.

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