deep-bed Articles

  • The Challenge: Building The New & Largest Mexico City International Airport Over A Swamp

    Construction of 48 km of access roads for the new $9-billion airport surely is a challenge. Located on the bed of the former Lake Texcoco, the soil is soft, saturated and swampy. The Solution: PRS-Neoloy® Geocell™ After extensive testing conducted by Mexico Highway Authority experts, it was agreed that only one geocell is qualified for ...


    By PRS Geo-Technologies

  • Transformational adaptation – when climate change means business as usual is no longer possible

    1. A lesson from the past Deep in the central Sahara, a crumbling mud-brick town sits at the edge of a dry lake bed. This is the medieval town of Germa, in southwestern Libya, one of a string of settlements along the Wadi al-Ajal, a valley defined by the towering dunes of the Ubari Sand Sea to the north, and the black cliffs of the Messak Settafet plateau to the south. Germa is romantic ...


    By Garama 3C Ltd

  • Particle deposition and mobilisation during deep bed filtration in oilfields

    Deposition of latex microspheres on a borosilicate filter was carried out at gradually decreasing suspension velocities at conditions favourable for particle attachment and excluding particle retention due to size exclusion. Particle critical retention concentration followed quadratic function of suspension velocity agreeing with the modified particle attachment/detachment model based on ...


    By Inderscience Publishers

  • What is a Spectrometer?

    The characteristics of a white LED light differs greatly, when compared to a yellow CFL. Without any special tools, one can see that the LED emits a clear white color, while the CFL generates yellow light. Going one step further, using a spectrometer, one will be able to “dissect” the light sources and see that they are composed of other colors in the visible light spectrum, such as ...


    By Larson Electronics LLC

  • CEA LASE laboratory uses Kartotrak to map radionuclides difficult to measure

    Problematics The autoradiography technique consists in depositing sensitive screens collecting the radiation on facility floors, ceilings or walls during different exposure times ...


    By Geovariances

  • Closer Look at the Capacity of SLA Batteries and Solar Energy Systems

    Sealed lead acid (SLA) batteries have a reputation for being durable when used to support portable electronic devices. They require minimal maintenance and offer leak-proof capabilities. But when used with solar energy systems, the units present issues that can hinder the potential and performance of the machines. For example, general purpose SLA batteries should not be deep cycled, as ...


    By Larson Electronics LLC

  • Use and application of Piezocone Penetration testing in Presumpscot Formation

    Abstract: This paper examines the advantages and limitations of CPTu and SCPTu as an exploration method for geotechnical engineering of Presumpscot Formation. Discussion will include typical results of CPTu and SCPTu data for Presumpscot Formation, application and use for settlement prediction, bearing capacity analysis, slope stability evaluation, and seismic design considerations. Intent is to ...

  • Product stewardship – recycling’s little helper

    Like many veteran recycling professionals, I have faced serious challenges in making the wish of recycling all materials come true.  Although paper, cardboard, cans and bottles have ready markets and collection infrastructure; computers, mattresses and other items did not.  They were the problem items that went into dumpsters because costs and lack of mechanism gave them little chance ...

  • Does your facility need Zero Liquid Discharge Technology?

    If your industrial facility discharges its waste into deep wells, streams, sewers to publicly owned treatment works (POTWs), and/or other waterways, it is likely there are some types of regulations on discharging the waste. With an increasing push toward environmental protection, many industrial facilities and effluent regulators are strengthening strategies to reduce industrial process waste. ...


    By SAMCO Technologies, Inc.

  • Recovering coal bed methane from deep unmineable coal seams and carbon sequestration

    Published data from nearly 2,000 coal samples comprising 250 coal beds from 17 states, representing many of the coal producing horizons in the USA, shows moderate correlation (0.7) between depth and methane content for high volatile coal ranks. Low-volatile rank coals average the highest methane content, 12.74 m?/ton (450 ft?/ton), subbituminous rank coals the lowest, ...


    By Inderscience Publishers

  • How deep is your BAF? Evaluation of different bed depths for high rate biological denitrification filters with limit of technology pollutant removal

    Downflow Denitrification Filters are tertiary water and waste water treatment systems that allow denitrification and suspended solids removal to occur in a single step and allow limit of technology pollutant removal. With more and more stringent nutrient removal regulations coming up, downflow denitrification filters have increasingly become the solution of choice for plants faced with the ...

  • 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

  • Deep Thoughts

    In viewing a presentation for a conventional jet aeration system or a Slot Injector™ aeration system, typically there will be a list of life cycle benefits which include energy savings, capital cost savings, and small plant footprint to name ...


    By KLa Systems, Inc.

  • In Deep Water

    In spring of 2013 the Rockmore ROK 500DH hammer was able to get a water-well driller in Washington, US out of a tight spot when a competitors hammer failed to reach the water table for the well he was drilling. The driller was using a hammer that was getting no penetration rate at 1,300 ft. Looking for help, he reached out to a Rockmore distributor in his area who was able to supply him with the ...

  • Deep Well Measurement

    Pulsar's superior echo processing was proven once again in this difficult very deep Welsh wet well application featuring a 23m 'shot' that needed to follow the level between the heads of two submersible pumps. The reliability and versatility of the advanced echo processing technology in Pulsars non-contact ultrasonic range has been utilised at the SwanseaWasteWater TreatmentWorks, in a 23m deep ...

  • Reed Beds

    Naturally occurring wetlands have a natural, innate ability to remediate contaminants from water. Over the decades BritishFlora have supplied many millions of reeds, Phragmites communis, for both habitat creation projects such as bird reserves to attract bittern, bearded tit and water rails, to name but a few. Common Reed is commonly planted to help with the cleaning of contaminated ...


    By BritishFlora

  • Evaluation of desalination costs with DEEP

    Detailed analysis has shown several discrepancies and pitfalls of coupling an economic evaluation code, such as SEMER to the desalination cost evaluation code DEEP. This paper resumes our findings, which may be of interest to other DEEP users. The paper in particular deals with the following issues: why is it that power costs from nuclear systems are systematically higher in DEEP than those given ...


    By Inderscience Publishers

  • Deep utility survey application

    Introduction Deep utility surveys are in most cases a nightmare to any GPR operator. The fact is that most of the utilities are in urban areas where there is a high amount of EM noise sources. Usually it is a complex net of entangled utilities, buried trenches and shafts that needs to be recorded and interpreted. The deeper one has to go, the harder it is to collect good quality data ...


    By Geoscanners AB

  • Portland, Or - Deep, DNAPL remediation

    In 1999, the senior managers of Thermal Remediation Services, Inc (TRS) while working for a former employer, as a subcontractor to AMEC, provided Electrical Resistance Heating (ERH) for VOC-impacted groundwater at a commercial site in Portland, Oregon. The remediation was conducted under the Oregon Department of Environmental Quality (DEQ) Voluntary Cleanup Program. The remedial action objective ...


    By TRS Group, Inc.

  • Deep, DNAPL remediation Portland, OR

    In 1999, the senior managers of TRS Group, Inc (TRS) while working for a former employer, as a subcontractor toAMEC, provided Electrical Resistance Heating (ERH) for VOC-impacted groundwater at a commercial site in Portland,Oregon. The remediation was conducted under the Oregon Department of Environmental Quality (DEQ) Voluntary Cleanup ...


    By TRS Group, Inc.

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