concrete clarifier Articles

  • Replacement of 130 ft Secondary Clarifiers at a 25 MGD wastewater treatment facility

    Challenge A municipal WWTP found that (2) of their secondary clarifiers were too rusted and corroded to properly function. A traditional clarifier refurbishment consisting of sandblasting and painting was not a viable option because one of the clarifier rake arms had recently broken due to its poor condition. The plant engineers decided that a clarifier rebuild was necessary to ensure ...

  • California Sulfate Damage Awards case study

    The construction defect trial went against developer Brighton Homes, concrete subcontractor James Mock Inc, and concrete supplier Owl Rock Products, based on negligence to abide by the provisions of the Uniform Building Code (UBC). The significance of this verdict is that while sulfate attack of concrete from the surrounding soils has been widely known and researched in the United States, ...


    By Headwaters, Inc.

  • Bollard Installation

    Sustained health and safety of the human population requires that remediation systems be set up to take care of high levels of contaminants in water bodies, soil groundwater or other locations as deemed fit. Environmental construction companies are frequently called up on for this purpose. Need for Bollard InstallationExecution of the remediation strategy may involve excavation, concrete coring, ...

  • Town of Manhattan, MT 400,000 GPD Bio-wheel plant case study

    The Manhattan treatment plant is a 400,000 GPD plant in two trains, containing six 24 x 5.0 Bio-WheelTM. It is able to nitrify and denitrify, with two anoxic basins ahead of the aeration basins. Two conventional flight and scraper clarifiers are used. Three Penn Valley RA S/MLSS pumps are located in a separate pump room. The plant is designed for a future expansion to 0.8 MGD. At this time the ...


    By H2O Innovation

  • CH#825 - Improved Phenol Bio-Degradation

    BackgroundThe treatment plant at this industrial facility treats approximately 0.3 mgd waste containing phenolic compounds. Over the past year the treatment works has improved performance and consistently been able to produce good quality effluent with respect to phenol, however, an improvement in performance was required to meet future discharge limits. To achieve this level of treatment, ...


    By BIO-SYSTEMS International

  • The dynamics of technological learning inside the latecomer firm: evidence from the capital goods industry in Brazil

    This article focuses on the implications of the intra-firm learning processes for the direction and rate of latecomer firm-level technological capability accumulation. This relationship is examined in a capital goods firm – producer of equipment and complete plants for pulp and paper mills – during its lifetime of 24 years. Using a single case study design, this article draws from first-hand ...


    By Inderscience Publishers

  • Town of Manhattan Wastewater Treatment Plant

    The Manhattan treatment plant is a 400,000 GPD plant in two trains, containing six 24 x 5.0 Bio-WheelTM. It is able to nitrify and denitrify, with two anoxic basins ahead of the aeration basins. Two conventional flight and scraper clarifiers are used. Three Penn Valley RA S/MLSS pumps are located in a separate pump room. The plant is designed for a future expansion to 0.8 MGD. At this time the ...


    By H2O Innovation

  • Case study - Cost-efficient ditch provides a sustainable solution

    City needed a system that would weather the Upper Peninsula’s harsh winters This Wastewater Treatment Plant in Michigan sits on the shores of rugged and picturesque Lake Superior in the state’s Upper Peninsula. When the city needed to replace an aging system, they chose ...

  • Town of St. Marys Wastewater Treatment facility, Ontario, Canada case study

    Summary of Field Trials for Bio Organic Catalyst 1. Bio-Organic Catalyst Technology Description Bio-Organic Catalyst [BOC] is a concentrated liquid that contains patented amphiphilic molecules or surfactant. The organic catalyst contains no bacteria and is a nontoxic and biodegradable product. The functional mechanism is attributed to the ...


    By EcoJump LLC

  • Aerospace - Leading Aerospace manufacturing firm - case study

    Application The company designs and builds flight controls for aircraft and launch vehicles. Their product line includes thrust vector and steering controls for space vehicles as well as thruster valves, regulators and integrated manifolds for satellite propulsion. Manufacturing of most of these products requires either military spec plating or anodizing to ensure protection from extreme ...


  • Loch Turret water treatment works

    Actiflo® high rate sand ballasted clarification & multiflo lamella sludge thickening plant The Loch Turret upgrade was the largest drinking water project for Scottish Water in the latest investment period. The scheme was taken over in 2010 and is delivers approx 85 million litres of drinking water per day The Client Scottish Water is the UK's fourth largest ...


  • Use of online nutrient monitoring for automatic aeration and nitrate recycle pump control

    The Northside Wastewater Treatment Plant (WWTP) in Kinston, NC was expanded and upgraded in 2006 for biological nutrient removal (BNR) to meet limits of 3 mg/L total nitrogen (TN) and 1 mg/L total phosphorus (TP). In addition to the traditional approach of controlling the blowers based on dissolved oxygen (DO) readings, the City decided to implement an aeration basin blower control system using ...

  • The 1998 PCB Disposal Amendments: Guide to the 1998 PCB "Mega Rule"

    INTRODUCTION On June 29, 1998, the U.S. Environmental Protection Agency (EPA) promulgated a sweeping series of changes in the PCB regulations under the Toxic Substances Control Act (TSCA). Commonly known as the Mega-Rule or PCB Disposal Amendments (due to its focus largely on waste management issues), this long-awaited rule encompasses more than 80 changes in the regulations and spans more ...


    By Weston Solutions, Inc

  • Geotube Dewatering Technology Provides An Effective Dewatering Technology Solution For Dewatering Aggregate Tailings - Case Study

    Simple and inexpensive, Geotube dewatering technology can make management of tailings and fines much easier. Many aggregate plants experience high equipment and manpower costs associated with the handling and removing o( tailings and fines from settling ponds. The costs of maintaining pond operations can vary significantly from plant to plant. Not only is valuable space tied up ...

  • CH#824 - Steel Production - Activated Sludge

    BackgroundThe treatment plant at this Steel Mill treats approximately 0.3mgd waste from the coke and steel operations. Over the past year the treatment works improved performance and consistently produced a good quality effluent with respect to phenol, suspended solids, ammonia and cyanide. An improvement in performance was required to meet future discharge limits. To achieve this level of ...


    By BIO-SYSTEMS International

  • Odor control system addresses community’s complaints - case study

    The Customer: The Water Pollution Control Authority (WPCA) of the City of Bridgeport, Connecticut, operates two wastewater treatment facilities and maintains the city’s sewer system. The Customer’s Needs: After years of operating successfully in the community, the City of Bridgeport’s WPCA developed an odor problem at its East ...

  • Odor Control System Addresses Community’s Complaints

    The Customer: The Water Pollution Control Authority (WPCA) of the City of Bridgeport, Connecticut, operates two wastewater treatment facilities and maintains the city’s sewer system. The Customer’s Needs: After years of operating successfully in the community, the City of Bridgeport’s WPCA developed an odor problem at its East Side ...

  • Uptown shopping center

    ChitoVan Chitosan Lactate Cartridge Pretreatment and Sand Filtration Urban development and redevelopment present a host of challenges - not the least of which is managing site stormwater runoff. In a northern suburb of Vancouver Island’s beautiful city of Victoria, BC the stormwater challenge was met and bested through the application of both passive and active chitosan stormwater ...


    By Dungeness Environmental

  • WWTP Marines, Spain upgrading a municipal WWTP using AGAR® technology A Case Study

    Case Study: Municipal plantStart up: May 2007Capacity: 380 m3/d Abstract In view of EU directives for effluent discharge, it was required to upgrade the local sewage plant in the town of Marines, Valencia (Spain). The technology chosen for the project was AGAR® (Attached Growth Airlift Rector) of AqWise - Wise Water Technologies Ltd. La Entidad Pública de ...

  • Introduction to Decentralized Packaged Wastewater Treatment (PWWT) Systems - PDH Article

    Learning Objectives After reading this article, you should understand: Functions and processes of a decentralized PWWT system; Design considerations of a PWWT system. Overview "Clean water will be the oil of the 21st Century." The accuracy and magnitude of this statement is resonating worldwide. ...

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