deep-bed Articles

  • Search and Rescue Demo With Deep Trekker

    Search and Rescue operations are a large part of police divers jobs. While it is never nice to hear about a drown victim, the work that police divers do is extremely important to provide closure to the families involved. Each time a brave diver enters the water there is a number of risks involved, especially when the specific task at hand holds so much weight. One of the most ...


    By Deep Trekker Inc.

  • Guidelines for specification writing for Deep Soil Mixing

    Abstract: Deep Soil Mixing (DSM) was recently introduced into the United States as a geotechnical and environmental construction method. Primarily, DSM is used for deep foundation improvements. With the onset of this new technology, the need for guidelines for specification writing and the interpretation of testing results arises. This need would include guidelines for specifying construction ...


    By Geo-Con, Inc.

  • Improved oxygen conditions in the Baltic deep water

    Oxygen conditions in the south eastern Baltic have improved thanks to an inflow of oxygen-rich water from the North Sea during November/December 2011. This inflow has also caused the concentrations of phosphate and silicate to increase in the surface waters, which could cause excessive algal blooms this summer. As a result of the relatively large inflow from the Kattegat to the Baltic ...

  • Why Isn`t the Deep South Green? Or is it?

    Everyone is seeking the elusive killer app that will revolutionize energy. Most expect it to be a high tech gadget, or new form of ...

  • Deep ditch minimizes footprint - Case Study

    Aerator/mixer system reduces effluent discharge BOD, TSS and phosphorus A goal of many communities in planning wastewater treatment facilities is to minimize the footprint, reducing land use. To reach this goal, a Chinese municipality built their oxidation ...

  • Deep soil mixing at the Jackson Lake Dam

    Abstract: The Jackson Lake Dam was constructed in 1917 in the Grand Teton National Park near Jackson, Wyoming. The dam was a hydraulic fill placed on a natural alluvium and outwash foundation. The Bureau of Reclamation (Burec) determined that the dam and its foundation would be susceptible to liquefaction and failure during a potential earthquake; a series of contracts was let to remove and ...


    By Geo-Con, Inc.

  • Don’t let the bed bugs bite

    What creature feeds on humans and lives in the dark? No, it’s not a vampire—it’s a bed bug! Bed bugs can lurk in even the smallest hiding places and can wreak havoc on you and your loved ones. But, how do you know if you have bed bugs? One sign would be a sudden rash or lots of small bites appearing on your skin. Shedded skin remnants, fecal matter, or even small white eggs ...


    By Bird-X Inc.

  • Modular Reed Bed - Case Study

    The modular reed bed is an award winning, innovative solution for small footprint tertiary treatment. This case study follows the implementation of this technology on a small and remote sewage works which was overloaded during high rainfall. This project saved 91% in costs for the effected utility (which had a budget of £300k for the project) and provided a reduced health and safety risk ...


    By Greener Waste Technology

  • Case Study: Laurel Bed Dam

    Background Froehling & Robertson Inc were engaged by the Virginia Department of Game and Inland Fisheries to remediate seepage paths at the Laurel Bed dam. The dam had been leaking in excess of 500 gpm with water leaking in multiple locations. This water supply feeds a popular trout stream. If the dam failed, homes in the valley below the dam could be flooded. Q: ...


    By Willowstick Technologies LLC

  • Paste thickener bed level measurement

    Numerous studies and papers have been devoted to the subject of thickener design and operation to achieve specified throughput and discharge densities. Mathematical models have been developed that present methods for sizing thickeners and predicting performance under varying process conditions. The compression effect of deeper beds on dewatering performance is a recognized phenomenon. This is one ...


    By WesTech Engineering, Inc.

  • Filter bed remediation - Case Study

    Biological filter beds usually consist of a mineral media over which effluent to be treated percolates. The media becomes host to a biomass which is grazed by a series of more complex organisms. If the growth of the biomass is greater than the rate at which the grazing occurs then the biomass film will accumulate in the bed. This will block the interstices of the media and restrict effluent ...


    By Greener Waste Technology

  • Influence of bed height on the quality of rice husk ash in a fluidised bed combustor

    The purpose of this study was to investigate the effect of bed height on the quality of rice husk ash in a 210–mm diameter pilot scale fluidised bed combustor. The degree of rice husk burning in the fluidised bed could be deduced from the temperature of the combustor and the particle size of the resulting ash. The turbulence in the bed would break down the char skeleton of the rice husk ...


    By Inderscience Publishers

  • Sufficient air in the fixed bed reactor

    Delta Hybrid rotary lobe compressors made by AERZEN What about the typical sewage water smell? No chance! Visitors to the “station d’epuration” located in the district of Beggen have to pay close attention in order to realise that a wastewater treatment plant is in the neighbourhood - and one wich processes a daily water volume between 30,000 and 40,000 m3. In order ...

  • Full-scale operating experience of deep bed denitrification filter achieving <3 mg/l total nitrogen and <0.18 mg/l total phosphorus

    The Arlington County Wastewater Pollution Control Plant (ACWPCP) is located in the southern part of Arlington County, Virginia, USA and discharges to the Potomac River via the Four Mile Run. The ACWPCP was originally constructed in 1937. In 2001, Arlington County, Virginia (USA) committed to expanding their 113,500 m3/d, (300,000 pe) secondary treatment plant to a 151,400 m3/d (400,000 pe) to ...


    By IWA Publishing

  • Corrosion failure in deep wastewater tunnels: lessons and solutions

    Charleston Water System operates a deep inverted siphon tunnel system to collect and convey wastewater from the downtown peninsula across Charleston Harbor. This paper describes the considerations used in designing a replacement tunnel system for the original system constructed in the early ...

  • Dynamic Draft Tube – Deep Oxidation Ditch Technology

    Deep oxidation ditches and aeration basins are beneficial, permitting more water to be processed on a given surface area. However, standard vertical shaft aeration rotors limit oxidation ditches and aeration basins to an operating depth of no more than 4.5 meters (15 feet). The Dynamic Draft Tube Aeration Rotor overcomes the shortcomings of existing aeration rotors permitting operation of ...

  • Quality assessment of deep-well recharge applications in the Netherlands

    Artificial recharge of aquifers can be performed for various purposes and under varying hydrogeological conditions. We present an overview of deep-well recharge applications which have taken place in the Netherlands over the last two decades. We present the purpose of each application, the issues which had to be resolved, the preventive measures which were taken to improve performance and the ...


    By IWA Publishing

  • Structural safety of existing buildings near deep excavations

    Structural safety of existing buildings near deep excavations is evaluated by computing exceeding probabilities of different damage criteria within a simplified probabilistic methodology based on monovariate or multivariate probabilistic analyses employing the results of a numerical model of the boundary value problem. Different limit domains, defined on one or more deformation parameters and ...


    By Inderscience Publishers

  • Case study - Discharge measurement deep within a cave

    Research is currently being conducted in the Hessenhau cave, located in southern Germany. The cave is the deepest known within the Swabian Alps at 144m (472 ft) and has a stream running through it that connects it to other caves within the area. Discharge measurements were taken in different parts of the cave with the OTT MF pro electromagnetic current meter. Reaching the bottom of the cave ...


    By The OTT Hydromet Group

  • Assessing buried infrastructure deep under buried infrastructure

    In preparing for its water future, the Region of Peel (Peel) adopts a unique assessment strategy for a newly constructed potable water transmission main that extends deep underground through the heart of Peel Region. The effort is paying off, with Peel decision makers gaining a better understanding of this pipeline as it comes into ...

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