sediment dredging system Articles

  • Mechanical Dredging Vs. Biological Dredging

    For many years, mechanical dredging has been the solution for dying ponds, lakes, retention basins, and rivers. Dredging removes sediment, some excess nutrients, pollutants and organic matter. By increasing the depth in this way, weed growth is discouraged, water temperature lowered and oxygen levels may be increased. Although mechanical dredging can help in these ways, it only solves part of the ...

  • Lake dredge

    Final Dredge Effluent Polishing with CESF Treatment using ChitoVan Chitosan Lactate Hosting over 400 different species of plant, bird, fish, reptiles and amphibians, Burnaby Lake is the most ecologically valuable resources in the Vancouver, BC area. Over the course of many years of nearby development the lake had become filled with a substantial amount of sediment. To protect and enhance the ...


    By Dungeness Environmental

  • Dredging contaminated sediments at an active impact range: an ordnance avoidance success

    At Eagle River Flats, the challenge was to remediate the white phosphorous but leave the UXO (unexploded ordnance) behind. The solution was a dredge system that can withstand a big bang. Eagle River Flats, an estuarine salt marsh located at Fort Richardson in Alaska, has been used by the armed forces for over 50 years as an artillery impact area. During the 1980's, thousands of dead and dying ...

  • Overview of dredging concept, including automated dredging, with liquid waste technology dredges

    The RUNT Model RCLPEF, an electrically powered remote controlled dredge, is designed to remove sediments from the bottom of waterways, ponds, and settling lagoons. In situ solids are excavated and transported as a slurry through a piping system to a remote location. Foam filled, steel pontoons provide the necessary flotation to support the machinery and equipment in the waterway. Principal ...

  • Dredging for Gold in Remote Places

    By Dave Stoltenberg, Dredge Rental Specialist with SRS Crisafulli From Alaska to West Africa, SRS Crisafulli dredging experts are busy installing dredges and training operations personnel at producing gold mines.  Nearly all operating mines have overflow lagoons and impoundments for the collection of particulates, overflow mud, and tailings.  Typically ...


    By SRS Crisafulli, Inc.

  • Dredging Abrasive Materials? Learn about SRS Crisafulli’s New Dredge

    The Rotomite-6000-C, SRS Crisafulli’s newest self-propelled dredge, broadens the Rotomite-6000’s capabilities to include removal of highly abrasive materials. The Rotomite-6000-C also increases the customer’s return on investment (ROI) by cutting sludge ...


    By SRS Crisafulli, Inc.

  • Dredging the Hunsingo canal with Geotube - Case Study

    The Challenge The Hunsingo canal is situated in the northern part of Holland in the province Groningen. The canal had to be dredged because the water depth was not sufficient for the ships coming through and the regulations with regard to the water-balance in the region. A part of the canal is flowing through the centres of two village's, Zoutkamp and Ulrum. In these areas there ...

  • Mapping sediment thickness case study

    Polk County, Florida Bathymetric and sub-bottom surveys were conducted within a clay settling pond at a Phosphate mine in Central Florida. Prior to the geophysical survey, a depression or slump had formed along the northern dam of the pond. The purpose of the study was to map various sediment layers within the pond to help determine if the depressions or slumps were related to sinkhole ...


    By GeoView, Inc.

  • Dredging Q+A: Top 8 Questions Answered

    We strive to provide our customers with as much information as they need to make informed decisions about the dredging equipment they choose. So we compiled some of the questions (and answers!) asked most frequently for your quick review. Q: What kinds of dredges does SRS Crisafulli make? A: SRS Crisafulli produces hydraulic ...


    By SRS Crisafulli, Inc.

  • Proactive Dredging: A Little Now or a Lot Later

    By Isaiah Helm, Applications Engineer, SRS Crisafulli If public works departments had a list of fun things to do, dredging sediment out of holding ponds would not be on it.  It’s like cleaning the shower in your bathroom.  Whether you make ...


    By SRS Crisafulli, Inc.

  • Effect of Suspended Uncontaminated Sediment on POP Release

    The transport and fate of persistent organic pollutants (POPs) during resuspension events were investigated using a batch mixing technique. This technique allowed for the determination of sorption and desorption kinetics under more realistic mixing conditions than those used in previous investigations. It was demonstrated that sorption follows second-order kinetics that are dependent on both POP ...


    By John Wiley & Sons, Ltd.

  • Fountain creek sediment collector - case study

    An innovative sediment management method, a 30-ft wide, high capacity, Sediment Collector, is currently installed in Fountain Creek, Pueblo, Colorado upstream of the confluence with the Arkansas River.  This installation is intended to demonstrate a new technology available to reduce the need for dredging.  The purpose of the Sediment Collector is to demonstrate the capability to lower ...


    By Streamside, LLC.

  • Ecological Risk Assessment for Residual Coal Fly Ash at Watts Bar Reservoir, Tennessee Limited Alteration of Riverine‐reservoir Benthic Invertebrate Community Following Dredging of Ash‐contaminated Sediment

    Benthic invertebrate communities were assessed following the December 2008 release of approximately 4.1 million m3 of coal fly ash from a disposal dredge cell at the Tennessee Valley Authority (TVA) Kingston Fossil Plant on Watts Bar Reservoir in Roane County, Tennessee. Released ash filled the adjacent embayments and the main channel of the Emory River migrating into reaches of the Emory, ...


    By John Wiley & Sons, Ltd.

  • PCB dredging cleanup project begins on Lake Cochituate (USA) case study

    A large ring of yellow buoys floats beside an a LWT 8” Swinging Dragon swinging ladder dredge on the surface of Pegan Cove, marking the area where contractors have started removing sediment contaminated with PCBs, left by an accident at the Soldier Systems Center 30 years ago. The PCBs were found in the section of Lake Cochituate just to the east of Natick Labs. They came from a ...

  • ENEL launches a new LWT automated PLC controlled dredge in Guatemala

    Enel Latin America asked Liquid Waste Technology, LLC to design a LWT Pit Hog dredge equipped to excavate the main pond’s sediment from the Santa Maria River automatically. Enel Latin America needed a solution for removal of sediment accumulating in the power generation water supply at its Greenfield El Canada Power Plant in western Guatemala at Zunil. Enel Latin America asked Liquid Waste ...

  • Analyzing sulfur in soil and sediment with handheld XRF

    Background Sulfur creates more than nasty odors. Exposure to low levels (0-10ppm) of hydrogen sulfide (H2S) causes irritation of eyes, nose, and throat; higher levels can cause headaches, dizziness, nausea and vomiting, coughing, and breathing difficulty. H2S and numerous other odor-causing compounds are generated as a result of organic material decomposition. In the case of the Muddy River in ...

  • Remote control dredge prevents contamination at Fernald, Ohio nuclear remediation site

    When the operations manager at the Fernald, Ohio Super Fund Site Remedial Action Project needed a dredge to remediate sludge from one of four on-site waste (raffinate) pits, they required more than the usual dredging standards. The dredging operation was complicated with the possibility of unknown radon emissions, chemical contamination, and radiation that could be unleashed as material was ...

  • Application of a Tenax model to assess bioavailability of PCBs in field sediments

    Recent literature has shown that bioavailability‐based techniques, such as Tenax extraction, can estimate sediment exposure to benthos. In our previous study, Tenax extraction was used to create and validate a literature‐based Tenax model (TM) to predict oligochaete bioaccumulation of polychlorinated biphenyls (PCBs) from sediment; however, its ability to assess sediment remediation was ...


    By John Wiley & Sons, Ltd.

  • Biocatalysed acidification and metal leaching processes in sediments of polluted urban streams

    Sediments of fluvial streams are a sink for pollutants such as heavy metals and organic recalcitrant compounds. In anoxic conditions, sulphide generation and alkalinisation cause precipitation of heavy metals. The redox potential of the system could change to higher values, mainly owing to oxygen exposition generated by anthropogenic disturbances of the sediment such as dredging operations. ...


    By Inderscience Publishers

  • Remediation of the mercury-contaminated sediments in Svartsjoarna with Geotube - Case Study

    The Challenge Svartsjoarna in Sweden are located near Paulistrom. Through the lake, a small river runs into the river Eman. This Eman river is considered to be one of the most valuable water courses in Sweden. The river has a very high diversity of fish species and animal like otter. Some parts of the river have very well developed meander systems. For these reasons, a remediation had to ...

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