sand gravel filter Articles

  • Contaminated soils and sludge treatment plant - Case Study

    Client: Ecosistem Group, Lamezia Terme (CZ) – Italy Challenge: to transform waste into product! The Client possesses a large plant for the treatment of products contaminated with hazardous substances and materials, recycling of recovered materials and disposal of non-recyclable waste, which is considered highly ...


    By Baioni Crushing Plants Spa

  • Effects of physical disturbances on media and performance of household-scale slow sand (BioSand) filters

    Point-of-use (POU) water treatment provides households in rural and remote communities with a means of obtaining greater control over their water quality and its effects on human health. One of the most prevalent POU interventions, the BioSand filter (BSF), is a household-scale, intermittently operated slow sand filter used by over 300,000 households. The sand and gravel media within BSFs can be ...


    By IWA Publishing

  • Understanding the factors influencing the removal of heavy metals in urban stormwater runoff

    In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the ...


    By IWA Publishing

  • Maintenance of a Rainstore3 Stormwater Storage Chamber

    Invisible Structures, Inc. recommends that stormwater be pretreated prior to discharging into the chambers to avoid foreign matter accumlation inside the chamber. This can be accomplished by a variety of techniques or products. Some examples are: Short Term Storage (Detention Basin) “Zero” maintenance – the Preferred Method: Use a ...


    By Invisible Structures, Inc.

  • Sustainable, Low-maintenance Disinfection for Onsite Systems

    Most of the regulations applicable for onsite wastewater treatment system are based on the use of native soil for effluent dispersal. However, there are more and more situations where dispersal of effluent in native soil is impossible: repairs of existing systems on undersized lots for implementation of required dispersal fields: sites located in soils having low permeability: or where the ...


    By Premier Tech Aqua

  • Geotextiles in Construction Dewatering

    Woven geotextiles work wonders in dewatering applications as wraps around well screens and sump pit screens. The textile can be sewn into sleeves or tubes to be slid over the well screen or sump pit framework. This technique allows the user to compensate for well screens with slots that are too large or for sump pit piping with large perforations. By adding the geotextile sleeves the user ...


    By Griffin Dewatering

  • Use of horizontal flow roughing filtration in drinking water treatment

    In order to evaluate the feasibility of implementation of horizontal-flow roughing filtration for drinking water treatment a pilot was designed and run at the bank of Zayandehroud river near the village of Chamkhalifeh. Pilot running was performed in summer 2003 (July, August and September), when the quality of river water was in relatively worst condition. The filter is comprised from three ...

  • NCDOT culvert rehab case study

    HOBAS for DOT Projects The North Carolina Department of Transportation had a lot of challenges in rehabilitating an aging culvert along its seacoast near Nags Head. The existing culvert was leaking, causing sand to migrate into the pipe, undermining the sand dunes above. The line which outfalls directly into the Atlantic Ocean was also subject to a severe environment and was therefore ...


    By Hobas Pipe USA

  • Inetgrated Planning for Wastewater Treatment and Recycling for a Small Community Development

    ABSTRACTIntegrated water resources planning was conducted for Olowalu Town, a proposed development in western Maui, Hawaii. Total water needs, which can be supplied by a combination of diverted surface water, well water, recycled water and captured stormwater, are estimated at between 1 and 2 mgd. The Olowalu development will generate approximately 0.5 million gallons per day (mgd) of municipal ...

  • Whitepaper: Chemical-physical Water Treatment, Filtration and Flocculation

    Introduction In water treatment plants chemical-physical processes play an essential part in the process chain. They are successfully employed in the pre- and post-treatment of waters of different origins, as well as of other process liquids. In this regard the removal of particles by filtration is a central step. Classical filtration processes are used for particles ranging from ...


    By EnviroChemie GmbH

  • Drip distribution soil performance and operations in a northern climate

    Six drip distribution systems in Wisconsin were studied to determine the treatment performance of the soil beneath the distribution network. Of the six systems studied, three received septic tank effluent (STE), one received effluent treated by a recirculating gravel filter (RGF) and the remaining two sites were treated by aerobic treatment units (ATU). Soil conditions varied at these sites, ...


    By Geoflow, Inc.

  • Mine backfill

    Mine backfill is defined as the material used to fill the cavities (i.e., stopes) created by underground mining. Backfilling can be a means to dispose of sludge and/ or tailings which may contain hazardous materials and to reduce surface environmental impacts by storing tailings underground. Alternately, backfilling with nonhazardous materials can allow for mining productivity improvements. To ...


    By WesTech Engineering, Inc.

  • Filtronics’ NSF Certified Electromedia sets the standard for water filtration industry

    The key to any water treatment system and its efficiency and effectiveness is its filtering media, or the sand or gravel that helps to remove pollutants and contaminants from a water source. Filtronics’ exclusive Electromedia is a permanent filtering media that is National Sanitation Foundation (NSF) ...


    By Filtronics, Incorporated

  • Case study - Nottinghamshire Recycling

    DUO Equipment delivered and installed a new full washing and water management plant for Nottinghamshire Recycling Ltd (NRL). Based in Worksop, Nottinghamshire, NRL is a sustainable waste solution provider processing C & D waste, green waste, wood and recycled aggregates. The new washing and water management plant (which includes a Gennaretti centrifuge system) will provide NRL with the ...


    By DUO (Europe) plc

  • Treatment of domestic wastewater by a hybrid natural system

    The present study addresses performance evaluation of a hybrid natural system comprising of settling tank, sand-gravel filter (SGF), aerated constructed wetland (ACW) and vermifilter (VF) for the treatment of domestic wastewater. The sequential batch experiments were conducted in a pilot-scale experimental set-up. The biochemical oxygen demand (BOD5) was varied from 20 to 120 mg/L and the ...


    By IWA Publishing

  • Industrial Skid Mounted Filtration System, USA

    INTRODUCTION In April 2013, Pure Aqua successfully manufactured and supplied to a major wastewater treatment site in the USA with a skid mounted twin alternating multi-media water filtration system to remove suspended solids from well water. The multi-media filtration system comes complete ...


    By Pure Aqua, Inc.

  • Geotube Dewatering Technology Provides An Effective Dewatering Technology Solution For Dewatering Aggregate Tailings - Case Study

    Simple and inexpensive, Geotube dewatering technology can make management of tailings and fines much easier. Many aggregate plants experience high equipment and manpower costs associated with the handling and removing o( tailings and fines from settling ponds. The costs of maintaining pond operations can vary significantly from plant to plant. Not only is valuable space tied up ...

  • Wastewater treatment design parameter analysis using the Nan-Men contact bed treatment facility in Northern Taiwan

    Contact bed treatment is one of the methods used for constructed wetlands. Taiwan introduced contact bed treatment to treat sewage in 2004. The reference design parameters are based on data obtained from developed countries. These foreign designs ignore the unique hydrological environment and climate of Taiwan. This study tried to analyze the water quality of the contact bed treatment system and ...


    By IWA Publishing

  • The advantages of physico-chemical treatment

    Physico-chemical soil treatment is an effective technique to clean contaminated soils, removing a wide range of both organic and inorganic contaminants. Contaminants adhere to the fine-fraction of the soil, such as organic matter and clay/silt. The principle of the method utilizes the difference in grain-size and density of the materials and separates the different fractions by means of ...

  • Commercial BWRO Package, Iraq

    INTRODUCTION In July 2013, Pure Aqua, Inc. designed and manufactured a commercial BWRO unit to a major company in Iraq to lower chlorine, TDS, and odor from well water. The system included multimedia and activated carbon filters to remove particulates, odor, color and taste, and ...


    By Pure Aqua, Inc.

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