Filter Beds Articles

  • 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

  • Flood recovery project - Case Study

    Greener Waste Technology has been working with a utility company to combat the effects of flooding on a filter bed works. The works in question is low lying and next to a river which recently burst its embankment and flooded the filter beds entirely. The flood distributed large volumes of silt and mud onto the filters blocking the beds and starving the indigenous bacteria population of oxygen ...


    By Greener Waste Technology

  • 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

  • Two innovative devices for depth sampling in granular filtration systems. Desalination 286: 115–119, 2012.

    Appropriate devices for obtaining either interstitial water or grain particle samples or for measuring dissolved oxygen (DO) at depth within the interior of large-scale, industrial granular bed filters are currently lacking. We developed two innovative samplers for studying a Rapid Sand Filter (RSF) at an operational SWRO plant: the first for water and granular material, the second ...

  • Residence time and contact volume in sloped compost and compost/vegetated filter beds

    Little is known about transport mechanisms in sloped dormant vegetated and compost only filters for roadway runoff. Residence time experiments were carried out in triplicate in 0.254 m wide × 0.65 m long by 0.10 m deep beds using a bromide tracer. Bed slope was 12°. Only at the lowest flow rate tested (0.276 l/min per m of filter width) were mean residence times in compost beds with and without ...


    By IWA Publishing

  • Deepwell injection

    Project profile: BP Chemicals DATA: End User: BP Chemicals Location: Lima, Ohio Commissioned: November 2000 Units: (2) FDB-64P Hydromation, Deep Bed Filter Flow Rate: 1,300 gpm Process: Solids removal prior to deep well disposal ...


    By Filtra Systems

  • Copper & molybdenum mining

    Project Profile:Componia Minera, de Collohuasi Data: End User: Compania Minera Dona Ines de Location: Collahuasi Commissioned: Iquique, Chile Units: September, 2005 (1) FDB-50P Flow Rate: Hydromation Deep Bed Filter Processs: 620 gpm (21,000 ...


    By Filtra Systems

  • Evaluation of a hybrid upflow anaerobic sludge-filter bed reactor: effect of the proportion of packing medium on performance

    The aim of this study was to determine the effects of the volume occupied by the filter bed zone on the behavior of an anaerobic hybrid UASFB reactor. This configuration contains a sludge bed in the lower part of the reactor and a filter bed in the upper part. Three such reactors, each with a working volume of 9.8-L, were studied; these differed in proportion of packing medium occupying 50, 35 ...


    By IWA Publishing

  • Case study - Upper Uvdal wastewater treatment plant - Filter bed

    The plant is designed as a traditional chemical and biological treatment plant, as a polishing step the effluent is going thru a filter bed with Filtralite before it is discharged into a small creek. The filter bed treatment plant is built with Filtralite P in Nore and Uvdal municipal in Norway. Uvdal ski resort, some houses and several hundred holiday homes are connected to the treatment plant. ...


    By Filtralite - Leca Norge As

  • Bio-augmentation of fixed film filters

    Once regarded as the main process option for the waste water treatment for small communities, circular biological filters, so common on the outskirts of towns for many years, provided a reliable low cost and low profile method of treating household waste water. Quiet and robust, their simple engineering and structural design could be easily maintained by a daily visit from an operator, who, on ...


    By Greener Waste Technology

  • UK wastewater plant responds to rising demand & rising standards

    The resort town of Gillingham in south west England has responded to growing population plus increased treatment standards by installing four of Nordic Water’s Dynasand moving sand bed filters. The installation in its present configuration is designed to meet anticipated needs till 2013 – but with additional media and designed capacity for a potential fifth unit, it is expected to meet ...


    By Nordic Water Products AB

  • Bed expansion affects performance

    The experience of Pennsylvania Department of Environmental Protection staff over 14 years conducting filter plant performance evaluations led investigators to identify a coomon thread:'inadequate filter bed expansion eventually contributes to poor filter performance and reduced finished water quality.' The article points our that and insufficiently expanded filter is insufficiently cleaned, and ...


    By Entech Design, Inc.

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