Sand Filtration Articles

  • Tula Project - Case Study

    Customer: Hager & Elsässer (Germany) Project Name: Tula WWTP (Russia) Manufacturing year: 2008 Scope of supply 2 pcs. Ø 2.500 x 2.500 mm. Sand Filter Tanks supplied complete with supporting legs, ...


    By ASTIM A.S.

  • Youssifiyah WTP Project- Iraq - Case Study

    Customer: VA TECH WABAG (Germany) Project Name: Youssifiyah Project Manufacturing year: 2002 Scope of supply 4 pcs. of Sand Filter Tanks, Ø 4000 x 4600 mm, 6 bar test pressure 2 pcs. of Mixed Bed ...


    By ASTIM A.S.

  • Sand Filters for Cargill Food Industry O - Case Study

    Specifications: Capacity: 90 m3/h, inside and outside sandblasting + epoxy coating, full automatic. Complete weight: 24 tons. Scope of work: Project of filter tanks and piping, manufacturing, transportation, erection and ...


    By ASTIM A.S.

  • Experimental study on performance of sand filter layer to remove non-point source pollutants in rainwater

    Clogging characteristics of conventional sand filter layers with different grain-size distributions were experimentally studied to estimate their filtration capacity to capture non-point source pollutants in an artificial rainwater reservoir. A series of laboratory-scale chamber tests was conducted for artificial urban runoff synthesized with non-point source pollutants collected from a real ...


    By IWA Publishing

  • Case Study - Wiggins Road Water Purification Works

    ASW Engineering, a supplier of water treatment systems in southern Africa, was awarded the contract by Umgeni Water to refurbish 12 twin-cell rapid gravity sand filters. The company’s initial assessment of the problem was that the sealing between the filter nozzle sleeves and the concrete panels, and the sealant used in between the precast slabs of the filter floor, had deteriorated due to ...


    By Cadar Ltd.

  • Impact of surface maintenance on BioSand filter performance and flow

    The BioSand filter (BSF) is a household scaled, intermittently operated, slow sand filter. The BSF requires maintenance to remove trapped sediments. This study evaluated the effects of maintenance on the filter's flow rate and performance. Four concrete BSFs received three styles of maintenance: surface agitation (SA), stirring method (SM), and sand removal (SR). Effluent water was collected ...


    By IWA Publishing

  • Case study - Filtralite in London

    World best filter material for purification of drinking When algal blooms put the sand filters under pressure, Thames Water started its own in-house research into new filter materials. Not only did the effort cure the constraint, the use of new filter materials has saved millions in investments. Fast Cleaning To purify water with sand takes a long ...


    By Filtralite - Leca Norge As

  • Emulsified Oil Injection: Is smaller always better?

    Many professionals assume that the smallest oil droplets will transport the farthest during subsurface substrate injection.  However, this is not always true.  Water treatment engineers have studied particle (and droplet) removal in sand filters for decades.  They have learned that particle removal is a function of the frequency of particle-sand grain collisions and the probability ...


    By EOS Remediation, LLC

  • Use of bauxite for enhanced removal of bacteria in slow sand filters

    Slow sand filtration (SSF) is a well-known process for drinking water treatment and is widely used for the production of biologically stable drinking water and particle removal. The removal process of particles and microorganisms is highly dependent on the buildup of the schmutzdecke at the filter surface. During the ripening period and especially for cold waters, the buildup of the ...


    By IWA Publishing

  • Limited effectiveness of household sand filters for removal of arsenic from well water in North Vietnam

    Since well water utilized for domestic purposes in the Red River Delta of North Vietnam has been reported to be polluted by arsenic, barium, iron, and manganese, household sand filters consisting of various components are used. Information regarding the effectiveness of various sand filters for removal of the four toxic elements in well water is limited. In this study, arsenic levels in 13/20 ...


    By IWA Publishing

  • Development of slow sponge sand filter (SpSF) as a post-treatment of UASB-DHS reactor effluent treating municipal wastewater

    In this study, conventional slow sand filter (SSF) and modified slow sponge sand filter (SpSF) were investigated for the post-treatment of up-flow anaerobic sludge blanket (UASB)-down-flow hanging sponge (DHS) reactor effluent. The seasonal variation did not show significant differences in removal efficiencies of both filters. However in summer, both filters were able to achieve high total ...


    By IWA Publishing

  • How Thames Water reinvented its fast sand filters

    World best filter material for purification of drinking When algal blooms put the sand filters under pressure, Thames Water started its own in-house research into new filter materials. Not only did the effort cure the constraint, the use of new filter materials has saved millions in investments. Fast Cleaning To purify water with ...


    By Filtralite - Leca Norge As

  • The impact of fractionation of hydraulic load on oxidation performances of sand filters

    Infiltration–percolation is an extensive treatment technique aimed at eliminating organic matter, oxidizing nitrogen, and removing pathogens. The main purpose of this work is to evaluate the impact of fractionation of hydraulic load on oxidation performances of unsaturated sand filters. Experimental results showed that oxidation of organic matter and ammonium nitrogen has mainly occurred in ...


    By IWA Publishing

  • A pilot-scale study of Cryptosporidium-sized microsphere removals from swimming pools via sand filtration

    Cryptosporidium species are the most common cause of gastrointestinal illness in treated recreational water venues. In order to protect public health during swimming, Cryptosporidium-sized microsphere removals by high-rate sand filtration with six coagulants were evaluated with a 5.5 m3 pilot-scale swimming pool. A sand filter without ...


    By IWA Publishing

  • Virus removal vs. subsurface water velocity during slow sand filtration

    In an attempt to obtain a conservative estimate of virus removal during slow sand and river bank filtration, a somatic phage was isolated with slow decay and poor adsorption to coarse sand. We continuously fed a phage suspension to a 7-m infiltration path and measured the phage removal. In a second set of experiments, we fed the phage suspension to 1-m long columns run at different pore water ...


    By IWA Publishing

  • 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

  • Treatment of domestic greywater by geotextile filter and intermittent sand filtration bioreactor

    Intermittent sand filtration (ISF) is an efficient system for treatment of greywater; however, the high quality of effluent and the simple set-up contrast with the high failure rate due to clogging of surface layers. The efficacy of several polypropylene non-woven geotextiles (apparent opening size from 0.10 to 0.18 mm) used as primary treatment filters to remove suspended particles from ...


    By IWA Publishing

  • Simulation and verification of hydraulic properties and organic matter degradation in sand filters for greywater treatment

    To evaluate the treatment performance of vertical flow sand filters, the HYDRUS wetland module was used to simulate treatment in an experimental set-up. The laboratory filters were intermittently dosed with artificial greywater at a hydraulic loading rate of 0.032 m3 m−2 day−1 and an organic loading rate of 0.014 kg BOD5 m−2 ...


    By IWA Publishing

  • KSFA Onsite Systems Classroom Training - Case Study

    Installer: Kansas Small Flows Association Participants Instructor: Allison Biodig, REHS In August of 2009, around 40 participants were able to take part in the KSFA (Kansas Small Flows Association) "Classroom Training" workshop that taught the fundamentals of Drip Irrigation and Sand Filter onsite wastewater septic systems. ...


    By BioMicrobics, Inc.

  • Biodegradation of the cyanobacterial hepatotoxin [Dha7] microcystin-LR within a biologically active sand filter

    Cyanobacterial blooms in Thailand waters contain microcystin (MC) hepatotoxins that are a risk to animal and human health. The biodegradation of MCs is a safe and natural method of removal from water. The [Dha7] MC-LR was purified by chromatography, identified by liquid chromatography–tandem mass spectrometry (LC-MS) and used for examining the biodegradation of MCs. Analysis of MC levels ...


    By IWA Publishing

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