Media Filtration Articles

  • Case study - Filtralite Fredrikstad

    When renovating the filters the waterworks was interested in testing alternative filter media and replaced the anthracite layer in one of the filters with Filtralite® media for evaluation. Filtralite® is a filter media made of expanded clay and delivered by Saint-Gobain (Weber). In March 2002 Filtralite® media was installed on top of the existing sand in one out of totally 8 filters. ...


    By Filtralite - Leca Norge As

  • Bioconservacion at the CEPSA Chemical Plant - Case Study

    CEPSA continues to trust in Bioconservacion solutions for the prevention of corrosion in electrical control rooms. In CEPSA's different refineries we have already installed equipment to regulate corrosion and pressurisation in electrical rooms. We recently published an article on this subject on our blog; to read the article ...


    By Bioconservacion SA

  • One step, low pH iron and organics removal - Case Study

    Review For over seven years, the semiconductor facility performed routine on-site cleans of their reverse osmosis (RO) membranes using RoClean P111 with good results. However, over a six month period in 2015, membrane cleaning frequency increased to once a month and permeate flows could not be sufficiently restored. An Avista application specialist visited the site to personally monitor the ...


    By Avista Technologies, Inc.

  • Predicting the performance of multi-media filters using artificial neural networks

    The impact of flow rate and turbidity on the performance of multi-media filtration has been studied using an artificial neural network (ANN) based model. The ANN model was developed and tested based on experimental data collected from a pilot scale multi-media filter system. Several ANN models were tested, and the best results with the lowest errors were achieved with two hidden layers and ...


    By IWA Publishing

  • Filtration media: Shapes and manufacturing processes

    The shape of the filtration media and the production process directly affect the absorption capacity of the granulate and consequently the efficiency of filtration. Granules in the shape of a pellet (cylinder) do not facilitate such a high degree of compaction as spherical granules, so that the passage of the air flow becomes easier, ...


    By Bioconservacion SA

  • Effective production of rapid filters with polystyrene granules as a media filter

    In conventional water treatment stations, the filter cleaning is performed with the use of filtered water. To save water and obtain higher production, the use of polystyrene (PS) beads has been proposed as a granular filter element because it is a granular element with a low specific mass. By being lightweight, this material requires a lower water velocity during backwash. The PS beads were ...


    By IWA Publishing

  • Sorption of per‐and polyfluoroalkyl substances (PFASs) on filter media: Implications for phase partitioning studies

    Per‐and polyfluoroalkyl substances (PFASs) including perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are ubiquitous in the environment. Investigations into their fate and potential phase‐partitioning behaviour require separation of solid from aqueous phases via filtration. However, sorption of aqueous‐phase PFASs on filtration media may lead to underestimation of PFAS ...


    By John Wiley & Sons, Ltd.

  • Influence of air flow rate and backwashing on the hydraulic behaviour of a submerged filter

    The aim of this study was to evaluate backwashing effects on the apparent porosity of the filter media and on the hydraulic behaviour of a pilot scale submerged filter, prior to biofilm colonization, under different hydraulic retention times, and different air flow rates. Tracer curves were analysed with two mathematical models for ideal and non-ideal flow (axial dispersion and Wolf and Resnick ...


    By IWA Publishing

  • Industrial Media Filtration Systems, Philippines

    INTRODUCTION In July 2013, Pure Aqua successfully manufactured industrial media filtration systems to a major company in Philippines to remove particulates, chlorine, organics, and odor from well water. The industrial media filtration systems were selected from our MF-1000 Series with 48" and 42" diameter ...


    By Pure Aqua, Inc.

  • Molybdenum(VI) removal by using constructed wetlands with different filter media and plants

    The efficacy and capacity of vertical-flow wetland filters on molybdenum (Mo) removal from wastewater was examined, employing reed (Phragmites australis) and cattail (Typha latifolia) as well as different adsorption granular media. Humus, cinder, modified cinder, as well as pyrite were used as filter media. A synthetic effluent with different concentrations of Mo(VI) at ...


    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.

  • Aerosol filtration in nanofiber filter media

    Nanofiber filter media are used in air filter applications where a compact filtration system with very high overall and fractional efficiency and low initial pressure drop  is required.  Moreover, because the aerodynamic drag force on nanofibers is very low compared to the drag on the large dust particles collected on the nanofiber media, this media is ideal for application to ...

  • Experiences on dual media filtration of WWTP effluent

    This research is legislation driven by the European Water Framework Directive (WFD) and the Dutch Fourth Memorandum on Water Management. The objective of this research is to achieve the removal of total nitrogen and total phosphorus by Dual Media Filtration. The target value during this research for total nitrogen is 2.2 mg/L and for total phosphorus 0.15 mg/L. The results show that for NOx-N ...


    By IWA Publishing

  • Dual-media filters, Fredrikstad waterworks, Norway

    Fredrikstad Waterworks in southeastern Norway has an annual water production of 15 mill. cubic metres and supplies the municipalities Fredrikstad and Hvaler. During autumn 2003 they have renovated their dual-media filters. After around 8 years of operation, the volume of filter media in the existing sand/anthracite-filters was significantly reduced resulting in poor filtering ...


    By Filtralite - Leca Norge As

  • Devolping Pre-treatment Strategy for SWRO Systems

    Typically open-sea water intake structures are constructed in the shallow areas where sea water depth is in the range of 3m up to 10m. Due to this SWRO plant with open intake will have source water with high debris, suspended solids and aquatic organisms requiring a very elaborate pretreatment system. Thus Pretreatment design becomes an important part for a long term operation of the seawater ...

  • Benefits of membrane technology

    For years, coagulation and flocculation, along with settling and granular media filtration, sand filters, and precoat filters using diatomaceous earth, have been the “standard” for removing contaminants from water sources. However, since the early 1990’s membrane filtration has gained momentum and is now considered mainstream technology for this purpose. Advances in material science and membrane ...


    By Pall Corporation

  • Cloth Media Filtration Technology Meets Very Low Total Phosphorus Levels in Existing WWTPS.

    ABSTRACT Alexandria (Minnesota) WWTP and Cayuga Heights (New York) WWTP are both facing new discharge permits that include more stringent total phosphorus (TP) levels of 0.3 mg/L and 0.2 mg/L, respectively. An AquaDisk® cloth media filter pilot unit was brought to these sites for a period of three (3) weeks each. Results of the two (2) pilot studies demonstrate that the cloth media ...

  • MEDIA FILTRATION, MEMBRANES, OZONE, AND UV

    ABSTRACT For reclaimed water disinfection, pathogen reduction to acceptable public health risk levels is theprimary objective. A second emerging objective is the ability to destroy trace pollutants(endocrine disrupters (EDCs), pharmaceutically active compounds (PhACs)) at a reasonably lowcost.The WateReuse Foundation’s Innovative Reclaimed Water Treatment Project ...

  • A Low Cost Solution to Reduce Total Nitrogen Discharged from WWTPs – Meeting the 3 mg/L Regulatory Limit in Total Nitrogen Using Existing Downflow Tertiary Media Filters as a Medium for Denitrification

    Existing tertiary media filters for solids removal may be used as a medium for denitrification of the secondary effluent to reduce the Total Nitrogen (TN) discharged by a Wastewater Treatment Plant (WWTP). This study explores the use of tertiary media filters as a low-cost solution for WWTPs in reducing TN levels to meet upcoming nutrient discharge regulations. Three pilotscale filters with sand ...

  • Pilot Testing Microfilters and Cloth-Media Filters for Lake Augmentation

    ABSTRACTMicrofiltration and cloth-media filtration were pilot tested for plant expansion and water supply augmentation purposes. The performance of the pilot units was assessed by evaluating key influent and effluent data, including suspended solids, turbidity, total phosphorous, hydraulic loading rate, flux, and chemical addition. Results showed that one of the cloth-media filters, and both of ...

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