static screen Articles

  • The design of static mixer heat transfer equipment for adhesives, sealants, resins and polymers.

    The fluids handled within the adhesives and sealant industries are amongst the most difficult to handle of any in the main process industries globally. The characteristics which make them particularly difficult to handle include: High viscosities (typically 1-2000 Pa.s, or 1000 to 2 million cP). Often non-Newtonian (viscosity is not constant and varies with shear rate). Some ...


    By National Oilwell Varco

  • Selection of food combinations to optimize survival, growth, and reproduction of the amphipod Hyalella azteca in static‐renewal, water‐only laboratory exposures

    While standardized sediment toxicity testing methods have been developed for the amphipod Hyalella azteca, no standardized chronic water‐only toxicity testing methods have been established. Furthermore, optimal feeding and water quality conditions for culturing and toxicity testing with this species remained unclear. Our objective was to determine the food or combination of foods that best ...


    By John Wiley & Sons, Ltd.

  • Practical Applications of Static Low Density Media Filters for Use in the Treatment of Domestic Wastewater

    ABSTRACTIn the treatment of domestic wastewater, both biological and physical contaminant removal mechanisms must occur to facilitate compliance with NPDES permit discharge requirements. Static low density media (SLDM) filters can be used to perform both of these duties allowing for the consolidation of various unit operations into one component. Previous studies have shown that both organic and ...

  • Extraction well design for DNAPL recovery.

    The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...


    By Hargis + Associates Inc

  • Avoidance of contaminated sediments by an amphipod (Melita plumulosa), a harpacticoid copepod (Nitocra spinipes), and a snail (Phallomedusa solida)

    The distribution of contaminants is seldom homogeneous in aquatic systems. In the present study, the avoidance response of Melita plumulosa, Nitocra spinipes, and Phallomedusa solida when exposed to contaminated sediments was investigated. Test vessels were designed to allow the congruent placement of two sediments and assessment of the movement of organisms between the sediments. When exposed to ...


    By John Wiley & Sons, Ltd.

  • Bio-Stabilization of MSW in Argentina - Case Study

    Largest Landfill in South America uses the Covered Aerated Static Pile (CASP) composting system to Bio-Stabilize 400 tons/day of Mix Solid Waste (MSW) derived from the landfill sparation facility. 2500 tons of un-separated MSW arrives daily from the City of Buenos Aries and the surronding area (population 12 million). Roughly 65 percent of the incoming waste is organic and can be diverted from ...

  • Calculating capacity at composting sites

    The addition of new composting facilities or expansion of capacity at existing ones is becoming more and more difficult as feasible sites are taken out of circulation. This has created interest in maximizing the unit production of compost at composting sites so that they perform as efficiently as possible. The need is especially acute if physical expansion is not possible, but increases in ...


    By BioCycle Magazine

  • Disposal Company Expands Composting Operations

    Since 1997, Texas Disposal Systems, Inc. (TDS) - an independently owned solid waste company located near Austin, Texas - has operated a composting division, Texas Organic Products (TOP). In our previous BioCycle report ( -Composting Is Alive and Well In Central Texas, - October, 1997), we described how TOP evolved after starting an initial grinding and static pile composting operation at our ...


    By BioCycle Magazine

  • First “True 8K” 120fps Dome Demo

    That was the headline that enticed me to fly to Toronto and the annual Giant Screen Cinema Association International Conference and Trade Show (GSCA). This event is all about the latest planetarium, IMax and other larger format curved screens – primarily in a dome or partial dome configuration. It attracts content creators, technology suppliers and operators of these theaters to see new ...


  • State Fish Hatcheries and Invasive Species Don’t Mix

    INTRODUCTION The Vermont Fish and Wildlife Department is responsible for the protection and management of the state’s fish populations. Cultured fish are stocked in natural and manmade areas that are excellent for growth and survival but have little or no spawning habitat. Other stocking areas include natural water bodies where spawning and nursery habitats have been destroyed or isolated from ...

  • Odor issues at Mariposa MSW composting facility

    The Mariposa County MSW composting facility was built at the county landfill to remove some dry recyclables from the waste stream and to produce compost for daily cover. One key motivation was to increase the lifespan of the landfill and to postpone a costly long-haul. The facility was permitted, designed and built by a team of engineers and vendors. It began operation in the summer of 2006. ECS ...


    By Engineered Compost Systems

  • Evaluating groundwater/surfacewater transition zones in ecological risk assessments

    Currently, there is a common perception that the discharge of contaminated groundwater to a surfacewater body does not pose an ecological risk if contaminant concentrations in surface-water samples are below analytical detection limits or at very low concentrations. The transition zone represents a unique and important ecosystem that exists between surface-water and the underlying ground-water, ...

  • Element Inspection Criteria for Couplings

    Baldor-Dodge Raptor’s easy to assemble, patent-pending split rubber element significantly decreases total cost of ownership and extends driven equipment life. Designed for drop-in interchangeability, the Raptor offers easy installation and reduced maintenance in an innovative design. When it is time to inspect or maintenance the coupling, it is important to know what to look for so elements ...


    By Modern Pumping Today

  • Controlling Dust and Bioaerosols at a Biosolids Composting Faclity

    Studies at enclosed Longmont, Colorado project evaluate exposure level of employees. Operational changes reduce dust, endotoxin and A. Fumigatus by 90 percent. WHEN dealing with public health issues and composting, attention has been predominantly focused on potential exposure from the release of Aspergillus fumigatus (A. fumigatus) from composting facilities. Numerous studies were conducted to ...


  • LED applications for signage

    The light emanating diode, which has really been around in excess of 100 years, is coming to fruition into a standout amongst the most imperative advances of this period. It is basically only one more approach to deliver light yet its guarantee of lower expenses and expanded productivity implies that it could be a real driver of progress for a huge number of commercial ventures. While its ...


    By Greenshine New Energy LLC

  • Mixed waste composting trends

    It's been about 25 years since vendors started marketing systems to process mixed municipal solid waste via composting in the U.S. Today, there are 13 plants, most fulfilling their niche in the communities they serve - whether managing MSW in high tourism areas, or processing residual organics from materials recovery facilities. Table 1 provides summary data on the 13 facilities. While we did not ...


    By BioCycle Magazine

  • Multilevel Systems

    Untitled Document Introduction A multilevel system is a groundwater monitoring device which allows ...


    By Solinst Canada Ltd.

  • How to certify aero engines

    Aircraft Engine Noise Certification PowerJet, formed as a joint venture between Russian OAO NPO Saturn & French SNECMA (SAFRAN Group), have designed and built the new SaM146 turbofan engine selected by the Sukhoi Civil Aircraft Company to power its Superjet 100 aircraft family. The Sukhoi Superjet 100 is a medium-haul airliner developed in collaboration with Alenia Aeronautica (Italy), and ...

  • Kijlstra’s precast CSOS lead the way

    As ever, time is money in the civil engineering industry and anything which can deliver high quality results in double-quick time is worth investigating. Hence in the specialised business of storm drainage and flood attenuation – currently a rare growth area in the industry – engineers and contractors are catching on to the considerable advantages of using pre-cast concrete ...


    By Kijlstra LTD.

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