floating cover Articles

  • Case study - Floating covers reduce TSS, improve chlorine disinfection

    Problem: Algae and ultraviolet (UV) rays were adversely affecting chlorination in an upstate New York reservoir and Southern Florida WWTF. Algae was shielding embedded bacteria from chlorine, making the bacteriacide ineffective, thus requiring the chlorine dosage to be increased. Algae increased the chlorine demand along with exposure to UV which dissipates un-stabilized chlorine. Both ...

  • Digester Tank Cover Repair

    Digester tank covers are placed on top of wastewater digester tanks and float on top of the liquid inside the tanks. The digester tank cover at this waste water treatment facility experienced corrosion damage over time due to the caustic nature and environment. Instead of a costly ($200,000) replacement, ENESEAL CR was applied after removing the old coating. Thus saving the facility a substantial ...


    By ENECON Corporation

  • Hidden considerations for aluminum internal floating roof design

    Background Since their inception during the 1950’s, the performance demands of aluminum internal floating roofs have evolved along a path that has closely followed that of their overall acceptance within the industry. The general perception regarding the applicability of an AIFR has certainly evolved as well, having been a relatively unproven product during the early days ...


    By HMT LLC

  • Town Branch WWTP Controls Odors with Modular Covers

    The Customer: The Town Branch Wastewater Treatment Plant located in Lexington, Kentucky, USA, serves a population of 130,000—about 60 percent of Lexington-Fayette County. The plant began operating in 1919, and currently treats almost 11 billion gallons of wastewater annually. The Customer’s Needs: The Town Branch Wastewater Treatment Plant ...

  • GTI’s cover for the town of Creston lasts 20 years - case study

    The Town of Creston, British Columbia, Canada, operates an anaerobic digester to treat brewery wastewater. Biogas is used to fuel a boiler for process heating. The system was approaching 20 years old and the cover, originally built by GTI, required replacement. The anaerobic digester had to remain in service while the covers were changed. The cover was replaced with an updated GTI gas collection ...


    By Geomembrane Technologies

  • Cover-all helps community keep drinking water safe

    Location: Angelica, NY, USAApplication: Water TreatmentBuilding Series: TITAN®Building Size: 90' w x 230' l (27.4m x 70m) When local engineers in Angelica, N.Y. began to search for a cover for an existing water reservoir because current systems were failing, it didn't take them long to discover a Cover-All® TITAN® building was the perfect solution. 'The wide clear-span space and how the building ...


  • Modeling effect of cover condition and soil type on rotavirus transport in surface flow

    Runoff from animal production facilities contains various microbial pathogens which pose a health hazard to both humans and animals. Rotavirus is a frequently detected pathogen in agricultural runoff and the leading cause of death among children around the world. Diarrheal infection caused by rotavirus causes more than two million hospitalizations and death of more than 500,000 children every ...


    By IWA Publishing

  • Reduction of odor and odorant emissions from slurry stores by means of straw covers

    Swine (Sus scrofa) slurry stored in open storages is a source of airborne contaminants. A customary practice for ammonia and odor control consists of covering the surface of the slurry with floating materials, such as straw. Although straw covers have been proven to generally reduce gaseous emissions, more knowledge is needed regarding how age, moisture content, and microbiological development of ...

  • Built-to-Last: GTI Cover Replaced After 20 Years

    The Customer: Creston is a small town in the Kootenay region of southern British Columbia, Canada. Since 1959, it has been home to Columbia Brewing, makers of Kokanee beer, now owned by Anheuser-Busch InBev. The Customer’s Needs: The Town of Creston wastewater treatment facility treats both domestic and industrial (brewery) wastewater. The brewery ...

  • GTI Has HP Hood’s Wastewater Treatment System Covered - Case Study

    The Customer: HP Hood LLC is one of the largest dairy operators in the United States with 13 plants across the country. It has been producing high quality, delicious dairy products for more than 160 years. The Customer’s Needs: HP Hood’s plant in Winchester, Virginia, USA, was undergoing a planned expansion to its wastewater treatment system to keep ...


    By Geomembrane Technologies

  • GTI Has HP Hood’s Wastewater Treatment System Covered

    The Customer: HP Hood LLC is one of the largest dairy operators in the United States with 13 plants across the country. It has been producing high quality, delicious dairy products for more than 160 years. The Customer’s Needs: HP Hood’s plant in Winchester, Virginia, USA, was undergoing a planned expansion to its wastewater treatment system to keep ...


    By Geomembrane Technologies

  • Floating wetland islands as a method of nitrogen mass reduction: results of a 1 year test

    Floating wetland islands (FWIs) were tested in Pasco County, Florida, as a method of reducing total nitrogen (TN) in reclaimed water during reservoir storage. The Pasco County Master Reuse System (PCMRS) is a regional reclaimed-water transmission and distribution system providing wastewater effluent disposal for the county. Total daily mass loading from reclaimed water is limited by nitrogen ...


    By IWA Publishing

  • GTI cover system helps Vallejo sanitation and flood control district streamline its plant operation - case study

    Geomembrane Technologies Inc. (GTI) was selected to design and build a new retractable, structurally supported geomembrane cover system for Vallejo. This cover system consisted of a composite sheet of high-strength, coated fabric tensioned across a series of low-profile aluminum arches which span the tank opening. Intermediate aluminum walkways spanning the tank were used to divide the fabric ...


    By Geomembrane Technologies

  • Solving a messy problem: Covering wastewater treatment in Halton region Ontario, Canada case study

    The Regional Municipality of Halton or Halton Region is located in Southern Ontario, part of the greater Toronto area. Halton owns and operates seven wastewater treatment plants for four Ontario cities in its jurisdiction. These plants are designed to treat wastewater from homes and businesses turning the effluents into biosolids. Turning waste into food requires a process that starts with the ...


    By CST Industries Inc

  • Maximizing Energy Recovery through Digester Gas Management System Enhancement

    ABSTRACTAdvanced anaerobic digestion practices and maximum energy recovery call for a digester gas system that reliably allows for complete biogas collection and utilization. This paper will describe the planning, design, and construction of a new digester gas management system at the East Bay Municipal Utility District’s (District) Main Wastewater Treatment Plant. The need for an upgraded ...

  • GTI and the City of Tulare celebrate 25 years of converting waste to energy - case study

    Energy conservation has always been extremely important to both the City of Tulare and the wastewater treatment facility. Since biogas can be used as fuel to generate electricity, the city wanted a means to reliably collect biogas from the BVF® reactor to recover the energy while also controlling odors and reducing greenhouse gas emissions. To address the City of Tulare’s needs, ...


    By Geomembrane Technologies

  • GTI helps keep Kamloops beautiful - case study

    The City of Kamloops is located in the interior of British Columbia, Canada’s westernmost province. As part of Kamloops’ Liquid Waste Management Plan, the city was seeking opportunities to use its wastewater as a resource, rather than treat it solely as waste. One method was to capture methane gas (biogas) produced from the anaerobic treatment of wastewater and use it to generate ...


    By Geomembrane Technologies

  • Enhanced Removal of Separate Phase Viscous Fuel by Electrical Resistance Heating and multi phase Extraction

    Abstract A floating hydrocarbon plume at a manufacturing facility in Georgia was remediated using electrical resistance heating (ERH) and multi-phase extraction. The hydrocarbon was a specialty fuel similar to kerosene or diesel fuel. Initially, hydrocarbon covered an area of 4900 ft2 (500 m2) and was up to l0 ft (3 m) thick, with most wells containing 1-3 ft (0.5-1 m) of hydrocarbon. ...


    By TRS Group, Inc.

  • Case study - Heat loss - A problem for wastewater treatment & nitrification

    Problem: Operators know aerobic and anaerobic systems need sufficient water temperature to keep microbial populations active and working. Heat loss is detrimental to effluent quality and gas production. Both systems can be negatively affected from low daily and seasonal temperatures. Unfortunately, most operators and engineers have no control over water temperature loss in their tanks and ...

  • Faecal coliform attachment to settleable suspended sediments in fresh surface waters: linear partition model validation and sediment concentration effects

    Controlled experiments were conducted to examine the validity of the linear partition model for faecal coliform (FC) attachment to suspended sediments and assess the impact of sediment concentration on the attachment. Sediments were collected from a river in Beijing, China and the suspended particles <62 μm were separated out and mixed with FC suspensions. The experimental mass ...


    By IWA Publishing

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