Sediment assessment
We assess the nature and volume of sediments and appropriate deposition.
Mapping and assessment
Tecomatic helps you to map sediment and suggests suitable deposition. We assess the character and volume of the sediment by taking samples from specified points (about 3-4 points) that are collected for a composite sample. We perform the analyses in our own lab in Kalmar. We perform an analysis that mimics the dewatered mass and an analysis that mimics the reject water that can be expected to occur.
Based on the analyses and characterization, we look at a potential classification for disposal. A short report is prepared where we compile information and analysis results.
An effective method to reduce particle-bound phosphorus, heavy metals and BOD content in water bodies.
Sediment discharge and dewatering
Tecomatic also offers sediment removal and sediment dewatering. Our sediment discharge concept is based on a powerful pumping method that is well suited for dredging ponds, controlled water environments and for emptying sedimentation ponds. The pond is emptied of sediment and dewatered directly on site. The end product is a dry, fine pulp and a dam that has its function and capacity restored.
The work is carried out using specially built suction pontoons designed to empty sedimentation ponds. These allow us to pump the sediment out of the dam in a controlled manner, without affecting the operation and water level.
Process of emptying and cleaning of sediments
A manned electric pontoon sucks up sediment from the bottom. The operation and water level of the dam is not affected.
The sediment is pumped via a hose to a polymer station where dewatering chemicals are added. Flocculation of particles begins while the sediment is pumped to a geotube.
The nature of the remaining sediment and the level of contamination will determine the appropriate disposal. For example, in some cases it can be used as a soil amendment.
Low flow dredging process
Tecomatic also offers low flow dredging, a method that is gentle on the bottom fauna and aquatic organisms as only the top layers of sediment are sucked up. This is particularly important in environments where we want to minimize turbidity and avoid disturbing marine life.
A manned electric pontoon sucks up sediment from the bottom. The operation and water level of the dam is not affected.
The sediment is pumped via a hose up to a control station where polymer is added. The sediment is then pumped to a geotube.
The sediment is dewatered in the geotube and the reject water is pumped to a sand filter container. The sand filter purifies the water from smaller particles and returns to the lake as clean water.
What remains in the geotube are nutrient-rich sediments that contain, among other things, phosphorus. These can be used as fertilizer in agriculture.
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