Silt Control Articles

  • Vanier Park ArmorFlex Boat Launch - Case Study

    A dock replacement and boat launch upgrade were in order for Vancouver’s scenic and popular Vanier Park. The City wanted a long-term solution that would extend the launch and resist the kind of deterioration that befell the previous precast concrete launch. Challenge The two main challenges for the project were a tight construction schedule (four week maximum) and the need ...


    By Nilex

  • Silt Fence installation efficacy: definitive research calls for toughening specifications and introducing new technology

    Introduction: Silt fence is a joke on many construction sites. It is often seen just blowing in the wind, or sagging and broken down. Some specifiers won’t utilize silt fence on their sites because it is too often installed improperly, and not maintained. Yet, the need for effective on-site sediment control has never been greater. Sediment-laden runoff has been shown to result in the loss ...


    By L & M Supply Company

  • Optimization of the coagulation–flocculation process for the removal of natural organic matter fractions present in drinking water sources

    We used an experimental design to determine the best coagulation–flocculation mechanism and the optimal operating conditions for the maximum removal of the natural organic matter fractions (hydrophobic acid (HPOA) and hydrophilic neutral (HPIN)), which are the main factors responsible for irreversible membrane fouling and the generation of disinfection by-products (DBPs). Charge neutralization ...


    By IWA Publishing

  • Reuse of effluent discharged from tannery wastewater treatment plants by powdered activated carbon and ultrafiltration combined reverse osmosis system

    We evaluate the applicability of a reverse osmosis (RO) system that combines powdered activated carbon (PAC) and ultrafiltration (UF) to treat the effluent discharged from tannery wastewater treatment plants. Conventional treatment processes such as neutralization, clariflocculation, and biological processes are used to clean the effluent before feeding to the PAC and UF combined RO system. ...


    By IWA Publishing

  • TURBIDITY BARRIER ULTIMATE GUIDE

    TURBIDITY BARRIER ULTIMATE GUIDE Definition Floating turbidity barriers (a.k.a. silt curtains, silt boom, sediment curtain) are a temporary in-water sediment barrier consisting of a continuous geotextile fabric curtain suspended from a flotation device on the water surface and held in ...

  • Customer comparison of Rotomite-6000 to competitive products-case study

    Crisafulli Sales Engineer's field report (May 2003) The Rotomite-6000 was a pleasure to operate. We dredged bottom ash and silt. The Rotomite Cobra Cutterhead's down pressure and articulation capabilities make the Rotomite-6000 effective against crusted sludge. The Customer had an unsatisfactory experience with a competitor's dredge, which they had rented the prior year: the ...


    By SRS Crisafulli, Inc.

  • P. W. Gillibrand - sand & gravel producer, Crisafulli Automated Remote Controlled FLUMP System-case study

    Customer: P. W. Gillibrand. Contact: Tom Robertson Type of Facility: Sand & gravel producer P.W. Gillibrand owns and operates an Automated Radio Remote Controlled FLUMP™ Sludge Removal System manufactured by SRS Crisafulli. The dredge is used primarily in the manual mode as the duty cycle duration required was not nearly ...


    By SRS Crisafulli, Inc.

  • Data normalization identifies performance issues - Case Study

    Introduction The Municipal RO Plant had been in operation for almost 18 years, producing ~290 gpm of permeate water for a city in Iowa, USA. It was one of the first RO plants in the state and the upper mid-west. In May 2008, city operators complained about a loss in system production. In response, the City contracted an RO membrane service provider to perform a cleaning regimen that produced ...


    By Avista Technologies

  • Recovering flows and pressures to start-up parameters - Case tudy

    Introduction A customer in Camarillo, California approached Avista Technologies to help restore baseline flows on a recently commissioned ultrafiltration (UF) system using HYDRAcap 60 membranes. The plant is located in a hot house, with its water source drawn from recycled hydroponics irrigation, also known as tail water. The system experienced flow loss shortly after start-up. ...


    By Avista Technologies

  • The Nitty-Gritty of Dust Control

    Landfill owners and operators spend a lot of time focusing on containment: containment of waste; containment of leachate; containment of gas, litter, and odors. Quite often, containment of dust ranks near the bottom of the list. But that doesn’t lessen the importance of dust control. ...


    By Blue Ridge Services, Inc.

  • 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 ...

  • 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.

  • 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

  • Biofilter

    Biofiltration is a pollution control technique using living material to capture and biologically degrade process pollutants. Common uses include processing waste water, capturing harmful chemicals or silt ...


    By IWA Publishing

  • SRS Crisafulli Explores Dredging and Hydropower

    SRS Crisafulli Explores Dredging and Hydropower Energy production and consumption worldwide is influenced by many factors.  Resource availability, economic activity, population growth and environmental ...


    By SRS Crisafulli, Inc.

  • High depth dredging

    In the dredging market, there is a new emerging trend: deep sea and high depth dredging and exploration. Deep sea exploration represents both a development possibility, and a huge technical challenge, where critical hyperbaric conditions, remote control and maintenance amends play an important role. ...


    By Dragflow S.r.l.

  • 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.

  • 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.

  • How Marinas Benefit From Scheduled Dredging

    Scheduled dredging enables marina owners to increase their profits and minimize their environmental impact. The purpose of this article is to highlight the importance and value of scheduled dredging for marinas. Maintaining adequate water depths in each boat slip and on approaches to marinas at low tide is essential to attract and keep the largest yachts in the regional ...


    By SRS Crisafulli, Inc.

  • Removing Dissolved Copper from wastewater effluent

    Removing Dissolved Copper in Wastewater Treatment Plant How do you meet your dissolved copper discharge limit if it is 1.6 ppb, 3.1 ppb or 6.1 ppb? What is the cost to achieve these limits? Which treatment is cost effective? Is deionization, Reverse Osmosis or chemical precipitation the best alternative to low level of dissolved copper in a wastewater system? Is it cost effective to run a ...


    By Jenfitch, LLC

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