bottom dredge 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 ...

  • 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 ...

  • Nashville airport dredging case study

    Project Sponsor:Metropolitan Nashville Airport Authority Application: Clean and dredge waste water treatment plant for airport runoff (from runway tarmac) Dredge Used: LWT RCLPE Runt Dredge (Remote Control Lagoon Pumper Electric) Project Summary: Automated remote control dredge with rail system to cover the entire pond ...

  • Kerr-McGee dredging case study

    Application:Clean and dredge paint pigment residuals Dredge Used: LWT 7MAU Series Pit Hog™ Dredge Project Summary: Electric manned automated dredge with 3 Krebs cyclones with a capacity of 2,100 gpm, magnetic flow meter to monitor pump performance, slurry density meter to maintain consistent percent solids by varying traverse speed, and ...

  • Recycling municipal sludge with portable dredges

    Policing the pit. With today's emphasis on resource recovery, even burdensome and seemingly worthless materials are becoming increasingly valuable. Take municipal sludge, for example. For sewage treatment facilities wrestling with the problem of sludge disposal, Liquid Waste Technology may have the answer. The New Richmond, Wisconsin, USA company manufactures dredges and lagoon pumping equipment ...

  • 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.

  • Hydraulic Dredging: A cost effective solution for most dredging tasks

    The vast majority of dredging jobs require removal of solids to depths of 30 feet or less. Several features enable hydraulic dredges to be the solution of choice for these applications. First, what are hydraulic dredges and how do they compare with alternative mechanical dredge types? Hydraulic dredges create slurries, combinations of solids and water, pump the slurries to the ...


    By SRS Crisafulli, Inc.

  • Sediment Spill Monitoring from Dredging, using the SediMeter

    Strategies for sediment spill monitoring and siltation measurements. The SediMeter allows a gradual increase in the equipment investment as conditions merit, from a single stand-alone logger, to a real-time monitoring network in which all previously purchased equipment can be included. Sediment spill causing siltation gives rise to two separate environmental problems: A suspended sediment plume ...


    By Lindorm, Inc.

  • Case study - SAIPEM off shore dredging

    Location: Baku, Azerbaijan Year: 2007 Off shore platform Working context Petroleum fixed steel platforms are used to extract petroleum from the bottom of the sea. The problem Remove sand and silt around the platform jacket. An application for deep sea and high depth ...


    By Dragflow North America

  • Can’t Afford Pond Dredging? We have solutions.

    Ponds and lakes naturally accumulate sludge and nutrients that lead to eutrophication and eventually pond or lake death. Natural succession is driving all lakes and ponds to become meadows and eventually forest. To slow or reverse this process and maintain a lake or pond beneficial microbes are critical. These beneficial microbes improve water quality by reducing nutrients and sludge through ...


    By Keeton Industries, Inc.

  • Case study - Dredge site testing PAHs in sediment

    The Grand Calumet River is a tributary located in Northwest Indiana, which flows into Lake Michigan. Years of industrial pollution caused by nearby steel mills, petro-chemical plants and oil refineries have contaminated the river with oil and other pollutants, which threaten human and ecological health in this watershed. The primary contaminants of concern are carcinogenic Polyaromatic ...


    By Sitelab Corporation

  • Case study - SAIPEM off shore dredging

    Location: Baku, Azerbaijan Year: 2007 Off shore platform Working context Petroleum fixed steel platforms are used to extract petroleum from the bottom of the sea. The problem Remove sand and silt around the platform jacket. An application for deep sea and high depth dredging. Working depth: ...


    By Dragflow S.r.l.

  • New LWT system improves safety for workers dredging radioactive materials

    Problem: Cleanup crews wanted to dredge radioactive sludge from hazardous waste pits without releasing contaminants to the environment. Solution: A remote-control system encloses the radioactive material during dredging and keeps workers at a safe distance. The Weldon Springs, Mo. Superfund site and remedial action project has four pits containing low-level radioactive raffinate debris and ...

  • 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 ...

  • Dredge caustic and abrasive materials in South Korea-case study

    Customer: Zinc mining & processing facility, South Korea. Problem: How to remove 200,000 cubic meters of 325 mesh goethite (pH 2.2 - 2.5 range; sulfuric acid) from a lined pond with dimensions of 120m x 253m. Since the material had settled and was resting on the pond bottom, dredging was selected as the appropriate removal method. No standard acid-resistant dredge ...


    By SRS Crisafulli, Inc.

  • Rotomite 180 application - dredging benzyne at 12 foot dept.

    Project Location: Northern Illinois, Dates: April-November 1992, 1993 Equipment Used: Crisafulli Rotomite 180P Self Propelled Dredge PROJECT DESCRIPTION: To dredge benzyne from the bottom of a 12 foot basin approximately 1,000 feet long and 500 feet wide and discharge it into the water column so biologic treatment (BUGS) could work. Once the basin ...


    By SRS Crisafulli, Inc.

  • Rotomite-6000-CD Dredge System - US Copper Mine-case study

    SRS Crisafulli's Integrated Product Solutions - To remove water, soft and abrasive material, sludges, and slurries from Industrial, Municipal, Agricultural, and Government Lagoons, Ponds, Lakes, Canals, and flooded and flood threatened areas. And to irrigate farms and ranches. Dredge Rentals. Many customers rent Crisafulli’s Rotomite and FLUMP dredges on ...


    By SRS Crisafulli, Inc.

  • Two stainless steel rotomite applications - dredging caustic and abrasive materials in South Korea and Venezuela

    Customer: Zinc mining & processing facility, South Korea. Problem: How  to remove 200,000m3 of 325 mesh goethite (pH 2.2 - 2.5 range; sulfuric acid) from a lined pond with dimensions of 120m x 253m. Since the material had settled and was resting on the pond bottom, dredging was selected as the appropriate removal method. No standard acid-resistant dredge was in ...


    By SRS Crisafulli, Inc.

  • Rotomite 180-P application - dredging benzyne at 12 foot depth-case study

    Marshall-Bond Pumps, Jeffrey A. Simpson, New London WA; 630-978-7867, Fx 630-978-7872, Marbond7@hotmail.com DREDGING CASE STUDY, Project Location: Northern Illinois, Dates: April-November 1992, 1993 Equipment Used: Crisafulli-Rotomite 180-P Self-Propelled Dredge PROJECT DESCRIPTION: To dredge benzyne from the bottom of a 12 foot basin ...


    By SRS Crisafulli, Inc.

  • SRS Crisafulli, Inc. ships a shallow draft dredge to Manila, Philippines to ring in 2013

    After a year of close collaboration with the customer, SRS Crisafulli’s versatile resources in both engineering and manufacturing resulted in shipment of a Rotomite SD-110 shallow draft dredge to Maynilad Water Service in the Philippines. Three Philippine firms played key roles to close the deal – i.e., Maynilad Water Services, a private water and ...


    By SRS Crisafulli, Inc.

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