Baffle Systems Articles

  • Influence of density flow on treated water turbidity in a sedimentation basin with inclined plate settler

    The removal efficiency of particulate matter from a sedimentation basin with an inclined plate settler in drinking water treatment facilities is sometimes reduced by density flow caused by temperature increases in the raw water. In this study, the structure of the density flow and its prevention are investigated by means of three-dimensional computational fluid dynamics (CFD). The results of ...


    By IWA Publishing

  • Case study - City of Montreal upgrade of Atwater and Des Baillets water treatment plants

    Sidestream Venturi Injection—Basin Nozzle Manifold Contacting System. Montreal, Quebec, Canada The Problem: In 2001, a water quality audit revealed that two of the largest drinking water plants in the City of Montreal were out of compliance with Quebec’s latest water quality rules. In response to the audit, the city upgraded the 1,400 MLD Atwater and the ...

  • Water Tanks

    If you need to transport large amounts of water for your business, no matter what your business may be, you’re going to need a water tanker – and there’s no better place to get just what you need than here at Amthor International. Here at Amthor International, we provide a wide variety of options so that you can customize your water tanker to fit your specific needs. ...


    By Amthor International

  • How to Save with Cooling Tower Credits

    Cooling towers dissipate heat from recirculating water used to cool chillers, air conditioners, or other process equipment to the ambient air. Heat is rejected to the environment from cooling towers through the process of evaporation. Therefore, by design, cooling towers use significant amounts of water. The thermal efficiency and longevity of the cooling tower and equipment depend on the proper ...


    By WaterSignal

  • Emsco/Bomco/Gardner Denver/NOV Mud Pump Fluid End Expendables

    Fluid End Expendables & Accessories Liner: hy-chrome liner, zirconia liner, ceramic liner, chrome-plated liner, hardned liner Piston: nitrile rubber piston, supreme piston, polyurethane piston, urethane bonded piston, green duo piston, blue lightning piston, white lightning piston Valve & Seat: ...

  • Modeling settling tanks for water treatment using computational fluid dynamics

    A computational fluid dynamics model is presented for the calculation of the flow, suspended solids, and tracer concentration fields in the settling tanks of the water treatment plant of Aharnes, an important component of the water supply system of the greater area of Athens, Greece. The model is applied to investigate the expected negative effect of the wind on the hydraulic and settling ...


    By IWA Publishing

  • Rocky reach spillway apron underwater concrete repair - Case Study

    We were contracted to preform an underwater concrete repair to the spillway baffle under spill gate 3, and preform an inspection of the spill way and dentate from spillway 2-8 and 9-12. The spillway was separated into two sections by a fish ladder between Bays 8 and 9. The perimeter of the eroded areas were delineated using an U/W track creating a key way, ensuring a minimum depth of repair, ...

  • Lightweight concrete mix profitable using heavyweight batch mixer

    To increase production of concrete mixes containing coal fired power generation plant ash products, Charah Inc. opened a new manufacturing plant in Emporia, VA, which also serves as a warehouse and distribution center for other concrete industry products. Profit margins are slim in this high volume business, so management placed great emphasis on the capital and operational costs of the equipment ...

  • Continuously mixing one batch at a time

    Ready-mix company improves mixing efficiency and ingredient accuracy by switching to a rotary batch mixer. When a concrete and ready-mix producer moved to a new plant, the mixing process was redesigned to include batching for greater control over the final product 's ingredients. Rich-Mix Products makes concrete and ready-mix products and packages them for sale in home ...

  • Glass blended rapidly with abrasion resistant rotary mixer

    While most reading this article may be unfamiliar with the Kopp Glass name, most are likely familiar with Kopp Glass products. From a humble beginning more than 80 years ago, as a manufacturer of red glass for railroad signals, Kopp now claims to be the world's leading producer of precision molded industrial quality technical glass.  The company is known worldwide among the ...

  • Rotary batch mixer yields high-quality blends for powder metallurgy

    GKN Sinter Metals Inc. is the world's largest manufacturer of parts made by powder metallurgy, a molding process that produces complex shapes with a range of properties. Powder metallurgy offers benefits in part fabrication over competing metal processes. It is faster than forging or casting and permits the use of more performance-enhancing alloys than die-casting. GKN Sinter Metals, Auburn ...

  • Bringing powdered metal blending in-house, rotary-style

    When processing powdered metal compounds for products such as gyro rotors, flywheels, counterbalances, boring bars and grinding quills, the proportion of powdered metal ingredients must be precise, and the distribution of those ingredients 100 percent uniform. Mi-Tech Metals, Indianapolis, IN, has been manufacturing products from high-density tungsten-based alloys for more than 26 years, during ...

  • Rapid, gentle blending maximizes strength of powder metal parts

    Nestled in the heart of the powder metal capital of the world, Allegheny Blending Technologies (ABT) specializes in custom blending of ferrous and non-ferrous powder metals that are sold to molders of powder metal parts. These blends of iron powder and additives (copper, nickel, graphite, manganese sulfide and dry lubricants) play important roles in products and equipment. In the U.S. automotive ...

  • NEFCO’s CFD study case study

    The study was originally conceived to evaluate the performance of the NEFCO Stamford Baffle design and several variations on that design to better understand the parameters that affected baffle performance. To that end, the plan was straightforward. The first step was the simulation of a 70-ft diameter clarifier. This clarifier would serve as the test bed to calculate the predicted effectiveness ...


    By NEFCO, Inc.

  • NEFCO™ Awarded new patents case study

    NEFCO™ has been granted two new patents for its Dual Surface Baffle System. The Dual Surface Baffle was developed from work done as a part of NEFCO’s on-going Computational Fluid Dynamics (CFD) Density Current Baffle Study. The first, US Patent No. 7,556,157, describes a Dual Surface Baffle with a curved lower baffle segment. The second, US Patent No. 7,726,494, describes a Dual ...


    By NEFCO, Inc.

  • The Monclova experience case study

    The Town of Monclova, Mexico found it necessary to increase the hydraulic capacity of its municipal wastewater treatment plant by 35% – from approximately 11.5 MGD to 15.5 MGD. The increase in flow was accomplished by upgrading the plant’s biological treatment process. Once the modifications were completed, the flow through the plant was gradually increased. As the increased flow ...


    By NEFCO, Inc.

  • Tracer experiment and RTD analysis of DAF separator with bar-type baffles

    This paper describes the development of a new dissolved air flotation (DAF) separator with a flow streamlining baffle to improve solid separation efficiency. The analysis of the RTD (residence time distribution) curves indicated that the parameter θ10 (dimensionless time at which 10% of tracer has discharged) increased from 0.38 for control reactor to 0.54 for the ...


    By IWA Publishing

  • Vortex in baffled surface aerator

    Baffled surface aerator and mixing tanks are different on the basis of the rotor placement. In mixing tanks, rotors are placed very deep in the tank, thus vortex creation can be prevented by placing the baffles. By definition, rotors are placed at or near the surface of water in surface aeration systems; complete prevention of vortex creation cannot be achieved by installing the baffles. Vortex ...


    By Inderscience Publishers

  • Tracer studies on an aerated lagoon

    The city of Palmerston North, New Zealand, has two aerated lagoons as its secondary treatment facility. Interest about treatment efficiency led to an investigation into the hydraulics in the second lagoon to determine if further optimisation was viable. A tracer study using rhodamine WT was undertaken to ascertain the stimulus response output. Samples were also taken at 24 points within the ...


    By IWA Publishing

  • NEFCO density current Baffle design

    The study was originally conceived to evaluate the performance of the NEFCO Stamford Baffle design and several variations on that design to better understand the parameters that affected baffle performance. To that end, the plan was straightforward. The first step was the simulation of a 70-ft diameter clarifier. This clarifier would serve as the test bed to calculate the predicted effectiveness ...


    By NEFCO, Inc.

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