Technologies
GEOTUBE® MDS Mobile Dewatering System
An efficient treatment and dewatering method designed for hooklift containers, suitable for liquid sediments, sludge, and residues.
Reducing water content, retaining solids and harmful substances, and minimizing treatment costs
The treatment and dewatering of sludge, tailings, and other liquid waste streams is a continuous operational challenge. Traditional geotextile tubes often remain too moist, while mechanical systems are capital-intensive, prone to failure, and lack sufficient capacity. This results in a wetter mass, meaning more material to be disposed of and transported, a larger space requirement on the treatment site, and higher material consumption.
GEOTUBE® solves these challenges by combining simple, passive dewatering with proven performance in solids retention, accelerated drying, and reduced labor requirements. Capable of reducing volume by up to 90 percent, GEOTUBE dewatering units enable efficient dewatering and consolidation—without additional labor or space requirements.
Dewatering and Consolidation in a Single Step
GEOTUBE dewatering units are manufactured from high-strength geotextile designed to retain solids while allowing water to escape. Sludge is pumped or dredged into the tube, and polymers are added to bind fine particles and accelerate water release. The filtrate drains through the fabric, while solids and harmful substances are retained inside the tube. We have also achieved excellent results with soluble metals and nutrients using the right additives. Over time, consolidation and drying continue through capillary action and consolidation.
We help design and select the best method for sludge removal and treatment. We model the solution using site-specific samples in our laboratory to choose the best option. In sludge treatment, we use precipitants or other additives to help retain heavy metals or other harmful substances.
Sludge Treatment as a Service
The treatment process includes the following phases:
1
Contact and reviewing the initial data together with the client
2
Assessment, sampling, laboratory tests, and design calculations
3
Expert services during the permitting and planning phases
4
Dredging and delivery of sludge treatment technology
5
Project monitoring and reporting
The suction dredging contractor is always tendered on a project-by-project basis.
Benefits of Sludge Treatment:
- User experience: over 20 years of experience in Finland and Sweden
- Watery, liquid sludge turns into solid: utilization or final disposal becomes easier, loading and transport are more economical
- Dry stacking: dry stacking of tailings, takes up less space and water does not surge
- Utilization: Geotube elements can be used, for example, to build a dam or an embankment
- Simple installation and operation: no mechanical parts or complex systems
- The amount and volume of sludge is significantly reduced: up to 90% of the original volume
- Large or small capacity: up to 3000 m³/h treatment capacity, which corresponds to the largest suction dredger, or alternatively available in a size of 0.1 m³
- Geotubes according to the project size, from a cubic meter to hundreds of thousands of cubic meters, with experience from real projects as well
- Purifies water: effectively retains solids as well as harmful substances, including heavy metals, also soluble metals
- No odor, no noise, no maintenance: Ideal for urban environments
- Versatile installation and mobile: can be stacked on top of each other or installed on a hooklift container
References implemented based on our design and technology
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Water treatment plant in City of Turku
Hydraulic dredging of sediments was required from an inlet settling basin at water treatment plant. Over time the basin had filled with sediments and needed a filtering.
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Gallsträsk lake renewal in Kauniainen
Gallträsk Lake in Kauniainen recreational area was in critical condition. The quality of water has deteriorated into almost hazardous level and making the area’s only lake nearly un usable for recreational outdoor activities.
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Rescuing Lapland’s bird paradise in Kemijärvi
We helped to clean a former paper mill area in Kemijärvi. Area is commonly known as a local bird habitat. Using a suction dredge method more than 300 000 cubics of contaminated soil will be processed and removed together with Vesirakennus Ojanen Oy.
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