Air Filter Media Articles

  • Bissell Point, Missouri - Trickling Filter installations applications - Case Study

    Bissell Point, the largest wastewater treatment facility in Missouri, expanded their facility in the mid-1980s to provide secondary treatment. The goal of the upgrade was to select a reliable process that would achieve high-rate BOD removal. They opted for trickling filter technology and worked with Brentwood to install roughly 3 million cubic feet of plastic media in 6 towers. Nearly 25 years ...


    By Brentwood Industries, Inc.

  • Focus on Microfiltration Part 3: Extending Service Life Using Prefiltration

    Last month we examined filter selection strategies for maximizing service life in continuous use applications.  In this 3rd installment, we will examine the use of prefilters to extend service life. Clarifying liquids with high levels of suspended solids is challenging, especially for applications requiring submicron filtration.  In these applications, filter users who experience ...


    By Sterlitech Corporation

  • Focus on Microfiltration Part 2: Filter Longevity and Filter Selection

    Last month, we described the considerations associated with predicting filter service life and how total throughput can be estimated through experimentation.  In this second installment, we will examine four filter selection strategies for maximizing service life in continuous-use applications. These aspects consider chemical compatibility, temperature, binding characteristics, and pore ...


    By Sterlitech Corporation

  • RTO upgrade sees significant benefits - Case Study

    A project this year to upgrade an existing RTO has been successfully completed in four areas: Increasing thermal efficiency by adding additional layers of ceramic honeycomb media into the RTO this has the benefits of energy reduction from lower gas consumption both during production & on standby. De-commissioning an old inefficient recuperative oxidiser which was attached to a single ...


    By AirProtekt Limited

  • December issue of Palas Particular available!

    Read more about newest innovations and developments Topics in this issue: Fidas Frog proves it worth at #MucOhneMief Green City e.V. used the particle measurement system to collect well-founded data Palas to expand product range for discharge systems for aerosol conditioning X-ray neutralizer XRC 049 ...


    By Palas GmbH

  • Chemical and microstructural analyses for heavy metals removal from water media by ceramic membrane filtration

    This study aims to investigate the ability of low cost ceramic membrane filtration in removing three common heavy metals namely; Pb2+, Cu2+, and Cd2+ from water media. The work includes manufacturing ceramic membranes with dimensions of 15 by 15 cm and 2 cm thickness. The membranes were made from low cost materials of local clay mixed with different sawdust percentages of ...


    By IWA Publishing

  • Media Replacement Restores Plant Capacity and Improves Flow

    Operating Issue A recycling facility that processes waste bakery products experienced significant reductions in airflow capacity, which negatively impacted their production rates. The bottleneck was a two-chamber RTO (Regenerative Thermal Oxidizer) system that took forever to start, suffered significant chamber-temperature imbalances and contained ineffective ceramic media. Factors that ...


    By Pollution Systems

  • Methods of Purification

    Water Innovations Water Systems Carbon Filtration is used for several reasons. Its primary purpose is the reduction of chlorine to less than 0.1 ppm. Chorine can damage softener resins, reverse osmosis membranes, and mixed bed deionization resins. Activated carbon will also help control tastes and odors, provide organic and hazardous organic chemical ...


    By Water Innovations, Inc

  • Coating techniques for glass beads as filter media for removal of manganese from water

    Dry as well as wet coating techniques were developed to coat glass beads as filter media to remove manganese from water. For dry coating, powdered manganese oxide ore was fixed on the media surface. Wet coating was achieved by depositing synthetic manganese oxides onto the bead surface. The media were characterized by electron microscopy as well as by testing the removal of Mn2+ in a ...


    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

  • Heavy metal removal - Case Study

    KDF 55 and 85 Provide Non-Chemical Water Treatment Media for Lead Removal and Other Heavy Metal Removal from Water In New Jersey's mercury contaminated groundwater - KDF media have been removing mercury to levels below the MCL since 1992. Redox media, non-chemical water treatment remove up to 98% of water-soluble cations (positively-charged ions) of lead, mercury, copper, nickel, chromium, and ...


    By KDF Fluid Treatment, Inc.

  • Can we bury the carbon dioxide problem?

    Seriously — carbon capture and storage could be a game-changer. Mention “carbon capture and storage” — the process of trapping carbon dioxide produced in fossil-fuel burning or other industrial processes and burying it underground — in polite company, and you’re likely to be pounced on. It’s absurdly expensive. It can never be rolled ...


    By Ensia

  • Case study -New media makes RTO natural gas usage a rarity!

    Overview Tekra Corporation has always had an eye on their energy conservation. They are a custom coater of plastic films in Wisconsin where state regulations require over 98% of the Volatile Organic Compounds (VOCs) emitted from their process be destroyed in an oxidizer system. While considering their first oxidizer system, Tekra's Engineers did their homework and invested in an early ...

  • Case study - Fiberglass polymer emissions: RTO control technology

    OVERVIEW A producer and supplier of corrosion resistant piping systems was looking to improve the reliability and lower operating expenses of an existing air pollution control system at their facility. During their manufacturing process, centrifugally cast mortar pipe systems are reinforced with a fiberglass polymer. This makes the pipe ideally suited for most corrosive piping ...

  • Oxidizer Media Replacement Restores Performance for Containers-Manufacture

    Operating Issue A manufacturer of metal containers encountered major operating problems with their Eisenmann 40,000 SCFM Regenerative Thermal Oxidizer (RTO) that hindered their production performance and caused major concern regarding an upcoming air compliance test. The overall pressure drop across the system was high and the pressure imbalances negatively impacted their process ...


    By Pollution Systems

  • Treatment of petrochemical secondary effluent by an up-flow biological aerated filter (BAF)

    In this study, petrochemical secondary effluent was treated by a 55 cm diameter pilot-scale biological aerated filter (BAF) with a media depth of 220 cm. Volcanic rock grains were filled as the BAF media. Median removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) was 29.35 and 57.98%, respectively. Moreover, the removal profile of the COD, NH3-N, total ...


    By IWA Publishing

  • (Let) electronic data media be shredded - Case Study

    When disposing of digital data media, it is advisable to take care, as untold amounts of confidential data are stored on our computers, USB sticks, CDs and DVDs etc. and represent a security risk, above all for trading companies. But what happens to these storage media at the end of their life? The Federal Office for Data Security makes an unequivocal recommendation that the rule for hard disks ...


    By HSM GmbH + Co. KG

  • Case study - Engine test cell exhaust: RTO

    Overview A Mid-western outboard engine manufacturer bought a three year-old plant for the production of its marine engines. When finished, the engines are removed from the assembly line and run for quality control. The 25,000 SCFM of exhaust from testing contains volatile organic compounds (VOCs) that require regulatory compliance. Also within this exhaust is a great deal ...

  • Biofilters vs Asdorption

    In the last three decades biological technologies have emerged as a sustainable and economically-viable alternative compared to traditional techniques like adsorption/absorption for purifying gases. They were well-received initially in the industry and interesting products with good results were carried out for several years. However, owing to a series of reasons that will be detailed in this ...


    By Bioconservacion SA

  • Mitigation of Cu(II) phytotoxicity to rice (Oryza sativa) in the presence of TiO2 and CeO2 nanoparticles combined with humic acid

    Engineered nanoparticles (NPs) and natural organic matter (NOM) in the environment may interact with background contaminants such as heavy metals and modify their bioavailability and toxicity. In this work, the combined influences of two common NPs (TiO2 and CeO2) and humic acid (HA, as a model NOM) on Cu(II) phytotoxicity to rice were investigated by a 3‐day root elongation assay performed on ...


    By John Wiley & Sons, Ltd.

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