Particulate Filtration Articles

  • Diesel Particulate Filters in the City of London - Case Study

    The catalysed wall flow soot filter was designed and installed in the fourth quarter of 2008 to treat the Particulate Matter (PM), Volatile Organic Compounds (VOCs) & Carbon Monoxide (CO) in the exhaust gases from the outlet of an MTU 12V000G23E emergency generator installed in the basement in the financial district London EC2R. AirProtekt Catalysed Wallflow Particulate Filter is a system ...


    By AirProtekt Limited

  • 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

  • Particle removal in a novel sequential mechanical filter system loaded with blackwater

    A novel sequential mechanical filter system was developed as an alternative primary treatment method for onsite wastewater treatment. The filter combines traditional screening with a novel type of counter-flow filter using wood-shavings as a biodegradable filter matrix. This study tested the system in a batch loading regime simulating high frequency toilet flushing using blackwater from a ...


    By IWA Publishing

  • Attachment behaviour of inorganic particles on fibrous media: combined effects of dissolved organics and divalent cations

    A systematic study was carried out to investigate the attachment of inorganic particles to fabric media in the presence of divalent cations and the dissolved organics in water, on filter media, or on both. The presence of organics (humic acid, HA) reduced the attachment of inorganic particles on the fabric. Specific attachment trends were observed for the inorganic particles–fibre system. ...


    By IWA Publishing

  • Upstream Particulate Removal for Rtos on Direct-Fired Osb Dryers – How much is enough?

    Abstract Since 1994 Regenerative Thermal Oxidizers (RTOs) have been applied to direct wood-fired OSB dryers for the purpose of VOC abatement. In early direct wood-fired OSB dryer applications many OSB producers felt that upstream particulate control was not necessary. However, the ash from the combustion of wood waste created a host of new operational problems for the RTO systems. This paper ...


    By Lundberg, LLC

  • Effect of selective organic fractions on denitrification rates using Salsnes Filter as primary treatment

    The purpose of this project was to investigate the effect of selective particle removal during primary treatment on downstream biological nutrient removal processes. Bench-scale Salsnes Filter fine mesh sieves were used as a primary treatment to obtain different organic fractions to test the effect on denitrification. Activated sludge and moving bed biofilm reactor anoxic tests were performed on ...


    By IWA Publishing

  • Integration of an evolutionary algorithm into the ensemble Kalman filter and the particle filter for hydrologic data assimilation

    Data assimilation (DA) methods continue to evolve in the design of streamflow forecasting procedures. Critical components for efficient DA include accurate description of states, improved model parameterizations, and estimation of the measurement error. Information about these components are usually assumed or rarely incorporated into streamflow forecasting procedures. Knowledge of these ...


    By IWA Publishing

  • Impact of kaolinite clay particles on the filtration of Cryptosporidium-sized microspheres

    Granular filtration remains a key barrier for Cryptosporidium removal in water treatment plants without UV irradiation. To assess the impact of clay particles in source water on Cryptosporidium removal efficiency by granular filtration, this study investigated the co-transport of Cryptosporidium-sized microspheres and kaolinite particles in sand columns. To ...


    By IWA Publishing

  • Genset locomotive repower project - CSX transportation case study

    In December of 2007, CSX Transportation, in cooperation with PSEG Fossil LLC and NESCAUM, began a project to modernize three conventional switch locomotives to a more efficient and less polluting design.  Each locomotive engine was replaced with two smaller power packs, each equipped with a diesel particulate filter (DPF).  These locomotives are now cleaner, quieter, and more energy ...

  • Metals and bacteria partitioning to various size particles in Ballona Creek storm water runoff

    Many storm water best management practice (BMP) devices function primarily by capturing particulate matter to take advantage of the well‐documented association between storm water particles and pollutants. The hydrodynamic separation or settling methods used by most BMP devices are most effective at capturing medium to large particles; however, these may not be the most predominant particles ...


    By John Wiley & Sons, Ltd.

  • Challenging Engineering Design and Ultra Pure Fabrication for the Semi-Conductor Industry

    Challenging Engineering Design and Ultra Pure Fabrication for the Semi-Conductor Industry The semi-conductor industry is one of the most demanding in terms of its requirements from suppliers. Only a few companies worldwide have the expertise, the facilities, the knowledge and the experience to be considered when new plant equipment is put out for bidding. Similar to the pharmaceutical and food ...


    By Fabricated Plastics Limited

  • Combinations of Measures for Reduction of NOx & Nanoparticles of a Diesel Engine

    Reduction of NOx- and particle emissions of Diesel engines is worldwide an important challenge for the engineers. Some unregulated components, like NO2, NH3 and naoparticles NP came in the focus of attention in the last years.Application of EGR and / or SCR can lower NOx, using RME (Bxx) can increase NOx. What happens with NP, parameter which enters in some further steps of exhaust gas ...


    By Vestlandsforsking

  • Nano this and Nano that?

    Several terms, each with the prefix “nano-”, are now in use in the fields of filtration and its related separation processes, and it is important to be able to differentiate among their nuances of meaning. Firstly, there is nanometer itself, from which the others derive, and which is precise, measuring one thousandth of a micrometer or one millionth of a millimeter. It is thus a very ...

  • An end to the problem of particle emissions

    Austrian biomass heating systems guarantee an 80% cut in emissions. Recent studies have shown that these modern domestic boilers offer a significant reduction in particles, emitting fewer contaminating agents than previous generation boilers and wood stoves – with more than 100mg / ml of particles. The future will be based on new biomass combustion technology which cuts dust emissions from ...

  • Office Printers Emit Ultra fine particle pollution

    We’ve heard quite a bit about particulate matter PM10s and PM2.5s as components of air pollution that we are exposed to on a daily basis. Recent research papers are highlighting the dangers of ultra fine particles (UFPs), which have a diameter of less than 0.1 micrometres (or 100 nanometres). By contrast, the diameters of particulate pollution from PM10s and ...


    By Commercial Air Filtration

  • Simulation of particle capture in a microfiltration membrane

    The present study takes an interest in the description of the fouling mechanisms by a numerical approach at the microscopic scale. At first, an X-ray tomography has enabled the modelling of the membrane structure for the numerical simulations. Next, for different particle size, a same volume of particles has been sent in the modelled membrane and the final permeability has been computed. Thus, ...


    By IWA Publishing

  • Nanosized materials for environmental and energy related applications

    Efforts are being made to develop nanomaterials for addressing issues related to energy, environment and resource conservation. In this connection, research is being conducted at Environmental Materials Unit in the area of development of nanosized structural analogues related to molecular sieves and zeolites, surface functionalised zeolites, pervoskite based catalytic materials, multifunctional ...


    By Inderscience Publishers

  • School bus retrofits one local air

    The Hamilton County Department of Environmental Services, a local air agency covering the Greater Cincinnati Area in Southwest Ohio, has experienced many successes and failures obtaining grant money to fund school bus retrofits. However, seven years of persistent work has paid-off enormously. The adverse health effects of diesel exhaust were making national headlines in the early 2000s. The U.S. ...

  • Particulate matter, halogen and aerosols - Case Study

    Example: Production of anodes for aluminium smelters as well as electronic industry (TFT-LCD) Similar tasks: Carbon and graphite industry, smelting of aluminium, coating of metals An anode producer has several ring furnaces to stabilise the anodes by carbonization for later processing in a melting bath. The hot exhaust gases pass through double walls in between the anodes where the gases ...

  • American Upstart Filter Brand Competing with the Majors

    Flexotherm® has expanded its product line in the highly competitive filtration market.  The company now offers 2,900 different filter elements including coalescers, particulate, adsorbers, general purpose and high temperature filters. ...


    By Neptech Inc.

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