Solutions
Treatment of Sediment and Dredging Masses
We efficiently treat watery sediments, sludge, liquid waste, tailings, and mining waste. We separate solids from liquids.
Our clients include the mining industry, waste management, paper and pulp industry, steel industry, fertilizer industry, as well as municipalities, cities, and ports in Finland and Sweden.
Typical Target Applications
Wastewater ponds, tailings, mine ponds and scale pits, sedimentation and stormwater ponds, areas in front of dams, lakes, and rivers or similar water bodies will eventually fill up with sludge. Suction dredging or pumping is best suited for removing watery sludge.
Sludge Treatment
Often, the sludge is highly watery and also contains harmful substances. With our solutions, watery sludge can be processed into a solid form, and its volume is significantly reduced. The drainage water removed during the treatment can often be treated so that it can be discharged into the terrain or back into the process.
Sludge Treatment – Design and Implementation
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
Assessment, sampling, laboratory tests, and design calculations
2
Expert services during the permitting and planning phases
3
Dredging and delivery of sludge treatment technology
4
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
- Purifies water: effectively retains solids >99% as well as harmful substances, including heavy metals, also soluble ones >99%
- 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
-
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.
-
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.
-
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.
Contact us
