River Sand also has tankers, sealed dump trailers, roll-off containers, and a fleet of trucks for transporting sludge or lagoon waste off-site. Dewatering techniques such as drying beds, geosynthetic tubes, belt presses, filter presses, mechanical screening, settling ponds, land application, and other options are available. However, we also have many types of excavators that are effective for removing some types of sediment from lagoons. River Sand’s fleet of dredges includes large auger dredges to remote controlled dredges. The tolerance of dredging depth from the bottom is dependent on the type of material to be dredged, topography of the bottom of the lagoon, and liner. A wheel or skid can be placed on the auger to allow for dredging of hdpe plastic, rubber, or concrete lined lagoons. Auger dredges specialize in covering a wide swath of sediment in one pass (up to 8-10’) and agitate the material towards a center opening intake. Most auger dredges utilize a cable system for propulsion and can be set up to track along the lagoon for a complete clean-up of the material. Furthermore, an auger dredge is generally the preferred type of hydraulic dredge. Lagoon dredging is most commonly performed with a hydraulic dredge. Regardless of the type of sediment dredging is a solution that can utilize a vast array of dewatering techniques to remove the material from the lagoon and dispose of it properly. Lagoons or sludge ponds are often in place to capture and settle biosolids, alum sludge, industrial sludge, ash, tailings, or other components. Municipal and industrial lagoons are often a portion of wastewater treatment plants and water treatment plants.
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