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Academic literature on the topic 'Filter media'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2023

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Journal articles on the topic "Filter media"

1

Bharadwaj, R., A. Patel, S. Chokdeepanich, and G. G. Chase. "Oriented Fiber Filter Media." Journal of Engineered Fibers and Fabrics 3, no. 2 (June 2008): 155892500800300. http://dx.doi.org/10.1177/155892500800300210.

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Coalescing filters are widely used throughout industry and improved performance will reduce droplet emissions and operating costs. Experimental observations show orientation of micro fibers in filter media effect the permeability and the separation efficiency of the filter media. In this work two methods are used to align the fibers to alter the filter structure. The results show that axially aligned fiber media improve quality factor on the order of 20% and cutting media on an angle from a thick layered media can improve performance by about 40%. The results also show the improved performance is not monotonically correlated to the average fiber angle of the medium.

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Sutherland, Ken. "Filter media guidelines: Selecting the right filter media." Filtration + Separation 48, no. 3 (May 2011): 21–24. http://dx.doi.org/10.1016/s0015-1882(11)70117-3.

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Mariappan Kadarkarainadar, Marichelvam, and Geetha Mariappan. "Investigation of Fiber-Based Bag Filter Coated with Metal Oxides for Dust Adsorption." Fibers 11, no. 1 (January 13, 2023): 10. http://dx.doi.org/10.3390/fib11010010.

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The production of cement increases every year, which leads to the emission of dust/gas/ particulate matter. The emission of unfiltered dust would create a significant environmental impact. Hence, it is the responsibility of industries to control the emission of dust. Air filters and electrostatic precipitators (ESP) play a significant role in controlling pollutants. Synthetic filter media which are dangerous to our environment are widely used in most industries. The disposal of synthetic filters is an arduous task as the biodegradability of synthetic materials is poor. Hence, it is essential to develop an eco-friendly air filter material. In this paper, a new type of bag filter was designed by using natural sisal fiber as filtering media. The biodegradability of sisal fiber is better than the synthetic polyester media and also sisal fiber is less expensive. The natural fibers were coated with zinc oxide and iron oxide nanoparticles to improve the dust adsorption rate. Various tests were conducted as per standards to validate the performance of the filler media. The results were impressive. Hence, the proposed sisal fiber-based filter media can be used in cement industries for dust adsorption to minimize the environmental impact.

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Liu, Jing Xian, De Qiang Chang, Yue Xie, Ning Mao, and Xi Sun. "Research on Fine Particles Capture of Baghouse Filter Media." Applied Mechanics and Materials 300-301 (February 2013): 1293–97. http://dx.doi.org/10.4028/www.scientific.net/amm.300-301.1293.

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Industrial dust emission is one of the main sources of fine particle especially for PM2.5 in atmosphere. Filter media is the key component for baghouse. In the paper, several normal needle felt filters and membrane filter are studied through experiments. The performances of filter such as resistance, capture efficiency for total particle and number counting efficiency for fine particle are tested.The experimental results show that the resistance of filter increase after aging, the resisitance increasing rate of membrane filter is the smallest; The efficiencies for total particles of normal filter are above 99.9% at clean state, and 99.99% at stable state after aging; Although the filters have high efficiency for total particle, but the number counting efficiency for 10μm particle is 94%-99%, and 52%-92% for 2μm particles. New filters for fine particles are needed.

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Boni, André, and Michael Clark. "Filter media: Improving filter media to achieve cleaner air." Filtration & Separation 45, no. 9 (November 2008): 20–23. http://dx.doi.org/10.1016/s0015-1882(08)70367-7.

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Vaughn, Edward, and Gayetri Ramachandran. "Fiberglass Vs. Synthetic Air Filtration Media." International Nonwovens Journal os-11, no. 3 (September 2002): 1558925002OS—01. http://dx.doi.org/10.1177/1558925002os-01100309.

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This paper deals with ASHRAE filters used in air filtration applications and summarizes, on the basis of current research work, some of the reasons for the disagreement that exists among filter manufacturers concerning the properties and performance of various types of air filter media in general, glass and synthetic media in particular. Attention is also drawn to some important items that need to be incorporated in test methods and to some factors that could be affecting filter performance

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Poudel, Aashish. "Anthracite as filter Media in Filtration Process." Journal of Advanced College of Engineering and Management 6 (July 6, 2021): 1–7. http://dx.doi.org/10.3126/jacem.v6i0.38272.

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This research was carried out to see the performance of anthracite as filter media in filtration process. The study also aimed to compare two filter media in terms of turbidity it removed, head loss development with time and filter run with increase in influent turbidity. Two rapid gravity filter(RGF) columns were prepared having internal dimensions of 11x11x290 cm3, one with anthracite and another with sand as filter media. The uniformity coefficient of sand and anthracite of 1.54 and 1.4 were maintained from sieve analysis. Constant Filtration rate of 3m/h was set and other ancillary activities were made same for both filter models. The experiments were repeated seven times with different influent turbidity ranges of 0-25, 25-50, 50-100, 100-150, 150-200, 200-250, 250-300 NTU. Both the Filters were back washed with back washing velocity of 24 m/h, when the terminal head loss of 165.4 cm was obtained. The effluent quality of anthracite obtained was better for all the filter run. The head loss development with time was more for sand filter in all filter runs. The filter run time for sand vary from 150 to 8 hours and for anthracite, it varies from 172 to13 hours from first to seventh filter run.

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Li, Huan, John D. Wanjura, William B. Faulkner, and Ronald E. Lacey. "Evaluation of Filter Media Options for High Volume PM2.5 Sampling." Applied Engineering in Agriculture 35, no. 2 (2019): 205–9. http://dx.doi.org/10.13031/aea.13010.

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Abstract. Polytetrafluoroethylene (PTFE), glass fiber, and cellulose fiber filter media were evaluated under controlled conditions to determine their suitability for high volume PM2.5 sampling. Repeated mounting and unmounting events of new filters not exposed to ambient particulate matter were conducted in a laboratory environment and differences in the filter weight recorded. After the initial mounting and unmounting event, the filters exhibited weight changes of -2.24 mg, -0.61 mg, and 0.18 mg for cellulose, PTFE, and glass fiber filters, respectively. The standard deviation of replicated measurements after the first event was 1.76 (n = 9), 0.50 (n = 10), and 0.31 (n = 10) for cellulose, PTFE, and glass fiber filters, respectively. The combination of weight loss and standard deviation made the cellulose filter unsuitable for use in high volume PM2.5 samplers. However, improved performance over PTFE filters, suggests that glass fiber filters similar in specification to PTFE filters should be considered as acceptable substitutes in high volume PM2.5 sampling. Keywords: Air quality, Error, Filters, Measurement, Particles, Sampling technique.

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Liao, Z., and H. Ødegaard. "Coarse media filtration for enhanced primary treatment of municipal wastewater." Water Science and Technology 46, no. 4-5 (August 1, 2002): 19–26. http://dx.doi.org/10.2166/wst.2002.0542.

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In these experimental studies enhanced primary treatment in coarse media filters has been evaluated. The coarse media used in the filters have been plastic carriers normally used for moving bed bioreactors, a Kaldnes carrier K1 with density < 1 g/cm3 (K1L) and a bigger carrier K2, that was used both in a lighter, floating (K2L) version and a heavier, sinking one (K2H). The results demonstrated that media characteristics significantly influenced filter performance. The dosing of a high MW and high charge cationic polymer was, however, found to have an even greater effect on treatment efficiency and especially on head loss development. Both filters were found to be feasible for enhanced primary treatment at high filtration rates (20-30 m/h) especially when dosing low dosages (1-3 mg/l) of polymer. The combination of two media into a dual media filter might take the advantages of both. Further experiments were carried out on a dual media filter consisting of lighter K1L media and heavier K2H media. It was indeed found that the K1L+K2H up-flow filter resulted in better performances in terms of water production when an optimised backwash procedure was taken into account.

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de Barros, Priscila Martins, Eduardo Hiromitsu Tanabe, and Mônica Lopes Aguiar. "Characterization and Efficiency Evaluation of Regenerated Filter Media." Materials Science Forum 727-728 (August 2012): 1643–47. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1643.

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This study aimed to evaluate the characteristics of virgin and regenerated filter media and their relation with filtration efficiencies for particles with aerodynamic diameter up to 20 µm. The permeability of the filter media was determined and their fibers were observed in a scanning electron microscope. Filtration efficiency was obtained from the dust cake formed. The particulate matter used was phosphate concentrate and the filter media were cellulose fiber filters. The results showed that regenerated filter media presented higher air permeability due to the opening of the fibers observed in the microphotographs obtained; lower removal efficiencies were observed for particles smaller than 2.5 µm; and for particles larger than 2.5 µm, the efficiencies were nearly the same as those of the virgin filter, which was approximately 100%. It was verified that the regenerated filter media lost their initial characteristics, but continued to be efficient for particles larger than 2.5 µm.

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Dissertations / Theses on the topic "Filter media"

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Srinivasan, Priyavardhana. "NANOFIBER INCORPORATED GLASS FIBER FILTER MEDIA." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1124903310.

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Raghavan, Bharath Kumar. "Nanofiber Filter Media for Air Filtration." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1279744866.

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Brika, Bashir. "Investigation of geometric properties of media particles for floating media filter." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5161.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: In a floating medium filter, polymeric beads with a density less than that of water form a floating bed which removes suspended material. Polyolefinic beads (polypropylene and polyethylene) are commonly used as filter media in this application. The geometric properties of the beads, and to a lesser extent the surface properties, strongly influence the performance of the filter. In the case of water treatment, the primary performance requirement is the production of a filtrate with turbidity ≤ 1.0 NTU. The influence of geometric properties on the performance of existing upflow filtration systems has not been extensively researched. The aim of this thesis was therefore to investigate the effects of floating medium granule size and shape on the performance of the floating medium filter (FMF). Towards this goal a pilot plant consisting of a dosing and flocculation unit and a clear PVC column with an inner diameter of 0.3 m and height of 2.8 m was designed and constructed, allowing the effect of media type, bed depth and filtration conditions to be investigated. Artificial feed water for use during the experimental work was made up by dissolving 250 mg/L of bentonite in tap water (≈ 60 NTU). Four median grain sizes (d50 = 2.28, 3.03, 3.30, and 4.07 mm) of polypropylene plastic granules were used. Two media shapes (cubic and disc) were evaluated. The effect of filtration rising velocity, medium depth, and coagulant chemical dosage were investigated using a complete 23 full factorial experimental design. Filter performance was evaluated in terms of filtrate turbidity and headloss development. The direction of filtration was upward in all the experiments. It was found that optimal conditions for turbidity removal were low filtration rate (36.8 L/m2· min), longer media depth (0.6 m) and optimum coagulant dose (23 mg/L). At these conditions the best medium was the one with d50 = 2.28 mm, for which a minimum turbidity of 0.4 NTU was achieved, and which was able to provide 624 L of filtrate of ˂ 1.0 NTU using a bed of 0.014 m3. For this medium headloss was 109 mm H2O at breakthrough, while the other three media showed a headloss of 42 mm H2O at breakthrough. Visual observation indicated that removal of solids took place primarily in the first 0.3 m of the floating bed in the case of the smallest medium, but that solids removal took place over the full depth of the bed for the other three media. It was found that bed depth had the strongest influence on performance for a given medium type. Experimental observation showed that coagulant dosage played an important role in floc size. A higher coagulant dosage (23 mg/L) resulted in a larger floc size which gave better performance. A lower velocity gradient was favourable for the formation of larger flocs. Some effect of media shape was noted, although it appeared that media size was dominant. It is concluded that FMF show promise for application in the water treatment. FMF, however, can be applied successfully as pre-filtration unit for treatment of high turbid water. Proper medium selection in conjunction with operating conditions can enhance performance of the filter. Smaller medium would give better turbidity removal but high headloss development and more frequent backwashing becomes necessary than with larger medium.
AFRIKAANSE OPSOMMING: In ŉ dryfmediumfilter vorm polimeriese korrels met ŉ laer digtheid as dié van water ŉ dryfbedding wat swewende materiaal verwyder. Poli-olefiniese korrels (polipropileen en poliëtileen) word algemeen in hierdie toepassing as filtermedia aangewend. Die geometriese kenmerke, en in ŉ mindere mate die oppervlakkenmerke, van die korrels het ŉ groot invloed op die funksionering van die filter. In geval van waterbehandeling is die hooffunksioneringsvereiste die produksie van ŉ filtraat met ŉ troebelheid van ≤ 1.0 NTU (“nephelometric turbidity units”). Die invloed van die geometriese kenmerke van filtermedia op die funksionering van bestaande stroomop-filtreerstelsels is nog nie omvattend nagevors nie. Die doel van hierdie tesis is dus om ondersoek in te stel na die uitwerking van die korrelgrootte en -vorm van ŉ dryfmedium op die funksionering van die dryfmediumfilter (DMF). Hiervoor is ŉ proefaanleg met ŉ doseer- en uitvlokkingseenheid sowel as ŉ deursigtige pilaar van polivinielchloried (PVC) met ŉ binnedeursnee van 0.3 m en ŉ hoogte van 2.8 m ontwerp en gebou, met behulp waarvan verskillende mediumtipes, beddingdieptes en filtreeromstandighede ondersoek kon word. ŉ Kunsmatige watertoevoer vir die proefneming is vervaardig deur 250 mg/L bentoniet in kraanwater op te los (≈ 60 NTU). Polipropileenplastiekkorrels met vier verskillende deursneë (d50 = 2.28; 3.03; 3.30 en 4.07 mm) is gebruik, en twee mediumvorms (kubus- en skyfvormig) is beoordeel. Die uitwerking van filtrasiestygsnelheid, mediumdiepte en die dosis koaguleermiddel is met behulp van ŉ volledige 23-faktoriaalontwerp ondersoek. Filterfunksionering is aan die hand van filtraattroebelheid en verlies aan drukhoogte beoordeel. Alle proefnemings is teen ŉ opwaartse filtrasierigting uitgevoer. Daar is bevind dat die beste omstandighede vir die verwydering van troebelheid ŉ lae filtrasiekoers (36.8 L/m2 per minuut), ŉ groter mediumdiepte (0.6 m) en ŉ optimale dosis koaguleermiddel (23 mg/L) is. In hierdie omstandighede was die beste medium die een met ŉ d50 van 2.28 mm, waarvoor ŉ minimum troebelheid van 0.4 NTU verkry is, en wat 624 L filtraat van 1.0 NTU met behulp van ŉ bedding van 0.014 m3 kon lewer. By deurbraak het hierdie medium egter ŉ drukhoogteverlies van 109 mm H2O getoon, teenoor die ander drie media se 42 mm H2O op dieselfde punt. Visuele waarneming dui daarop dat, met die kleinste medium, vaste stowwe hoofsaaklik oor die eerste 0.3 m van die dryfbedding verwyder is, teenoor die volle diepte van die bedding vir die ander drie media. Beddingdiepte blyk dus die grootste invloed te hê op funksionering wat enige bepaalde mediumtipe betref. Proefwaarneming toon dat die dosis koaguleermiddel ŉ belangrike rol in vlokgrootte speel. ŉ Hoër dosis koaguleermiddel (23 mg/L) het ŉ groter vlokgrootte en dus beter funksionering tot gevolg. ŉ Laer stygsnelheid blyk ook die beste te wees vir die vorming van groter vlokke. Hoewel mediumvorm oënskynlik ŉ mate van ŉ rol speel, is mediumgrootte eerder die dominante faktor. Volgens die studie blyk DMF belowend vir aanwending in waterbehandeling te wees, veral as voorfiltreereenheid vir die behandeling van baie troebel water. Behoorlike mediumkeuse saam met die regte bedryfsomstandighede kan die funksionering van die filter verder verbeter. Kleiner media sal troebelheid beter verwyder, maar het ŉ groot verlies aan drukhoogte tot gevolg, en sal dus meer gereelde terugspoeling as groter media verg.

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Rautenbach, Jeremy Brian. "Improving production yields in bio-pharmaceutical filter media." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111937.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, in conjunction with the Leaders for Global Operations Program at MIT, 2017.
Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, in conjunction with the Leaders for Global Operations Program at MIT, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 89-91).
This thesis presents methods to identify sources of variation in rolled goods manufacturing by defining the critical input process parameters, and the application of statistical process control. Sources of variation are prioritized according to a process control hierarchy, and reduced or eliminated through iterative cycles of rapid experimentation. This work emphasizes the value of team work, breaking down the organizational barriers between departments, knowledge sharing and the importance of a scientific approach to problem solving. FilterCo manufactures and assembles filter media catering to the ultrafiltration market growing at ~12% over the next five years. In a high growth scenario, production yield variability presents on-time delivery complications while below target yields drive significant scrap value. As FilterCo seeks to improve product lead time for its customers, while reducing WIP inventory, it must seek to maximize OEE with respect to product yield, equipment performance and availability. The variation identification, reduction and process control methodologies presented in this thesis are demonstrated to advance the goal of reducing production yield variation. The impact of the work has been verified on three filter media grades and have shown ~40% reduction in production yield variation, and rolled throughput yield improvements of ~30%. These improvements on the three membrane grades alone have resulted in an annualized saving equivalent to 60% of the total 2015 scrapped membrane value.
by Jeremy Brian Rautenbach.
S.M.
M.B.A.

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Dharmanolla, Sailaja. "A Computer Program for Filter Media Design Optimization." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1184095014.

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Arouni, Hamidreza. "Nonwoven coalescing fuel-water filter media for diesel engines." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/18692/.

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Fuel-water filters are a promising solution for the removal of water from diesel fuel and frequently rely on a depth coalescing nonwoven medium and a barrier mesh. Water is a fuel contaminant that can cause severe damage to engine injectors by promoting corrosion and microbial growth. Coalescing water out of diesel fuel has become challenging because of the increasing amount of bio-diesel and performance enhancing additives that are present to meet emission control regulations. High water content and the reduction in interfacial tension (IFT) between the water and diesel are associated with formation of more stable emulsions and the generation of smaller water droplets that are harder to remove. This research systematically investigates the characteristics of bio-diesel and surfactant (monoolein) blends with standard diesel fuel, and explores the factors affecting the efficient removal of water from fuel by means of depth coalescing media composed of poly(butylene terephthalate) (PBT) meltblown fabrics. It was established that bio-diesel and monoolein do not influence the IFT of water in fuel in a comparable manner and the resulting water droplet size distributions (DSD) are substantially different, which has implications in terms of the interpretation of results from commonly used ISO and SAE standard test methods. Fuels blended with bio-diesel exhibited higher viscosity and water content than fuel freshly blended with monoolein. Online measurement of water droplet sizes revealed substantially smaller water droplets in bio-diesel blends compared to monoolien blends at the same IFT measured using offline tensiometry. The surface wetting characteristics of PBT meltblown media were modified by alkaline hydrolysis independently of fabric geometric configuration and treated fabrics exhibited greater coalescence efficiencies (up to a 150% increase) but a lower quality factor than untreated samples due to a higher pressure drop attributed to increased water retention. The optimal wetting behaviour of fibres for achieving maximal coalescence efficiency was not the same for reference diesel and fuel containing surfactant, i.e. monoolein. A universal filter medium with a high coalescence performance cannot therefore be readily achieved if based solely on tuning fibre wetting properties. It was found that the fundamental trade-off between coalescence efficiency and pressure drop could be addressed by dynamic modification of fabric porosity (from 93% to 98%). By enabling fabric dimensions and geometric configuration to be modified in forced flow conditions, improvements in both coalescence efficiency (up to a 150% increase) and quality factor (up to 99 times greater) compared to the control flat sheet filter samples were achieved for both bio-diesel and monoolein-blended fuels.

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Hosseini, Seyed Alireza. "MODELING PARTICLE FILTRATION AND CAKING IN FIBROUS FILTER MEDIA." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2530.

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This study is aimed at developing modeling methodologies for simulating the flow of air and aerosol particles through fibrous filter media made up of micro- or nano-fibers. The study also deals with modeling particle deposition (due to Brownian diffusion, interception, and inertial impaction) and particle cake formation, on or inside fibrous filters. By computing the air flow field and the trajectory of airborne particles in 3-D virtual geometries that resemble the internal microstructure of fibrous filter media, pressure drop and collection efficiency of micro- or nano-fiber filters are simulated and compared with the available experimental studies. It was demonstrated that the simulations conducted in 3-D disordered fibrous domains, unlike previously reported 2-D cell-model simulations, do not need any empirical correction factors to closely predict experimental observations. This study also reports on the importance of fibers’ cross-sectional shape for filters operating in slip (nano-fiber filters) and no-slip (micro-fiber filters) flow regimes. In particular, it was found that the more streamlined the fiber geometry, the lower the fiber drag caused by a nanofiber relative to that generated by its micron-sized counterpart. This work also presents a methodology for simulating pressure drop and collection efficiency of a filter medium during instantaneous particle loading using the Fluent CFD code, enhanced by using a series of in-house subroutines. These subroutines are developed to allow one to track particles of different sizes, and simulate the formation of 2-D and 3-D dendrite particle deposits in the presence of aerodynamic slip on the surface of the fibers. The deposition of particles on a fiber and the previously deposited particles is made possible by developing additional subroutines, which mark the cells located at the deposition sites and modify their properties to so that they resemble solid or porous particles. Our unsteady-state simulations, in qualitative agreement with the experimental observations reported in the literature, predict the rate of increase of pressure drop and collection efficiency of a filter medium as a function of the mass of the loaded particles.

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Andersen, Erin R. "Thallium Removal from Drinking Water Using Pyrolusite Filter Media." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7399.

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Thallium (Tl) is a rare heavy metal in drinking water, but its extreme toxicity makes its removal crucial to consumer health. Traditional treatment methods do not work for Tl in sources with high concentrations of ions like calcium (Ca+2) and potassium (K+), as they are removed preferentially to Tl. A treatment method that specifically targets Tl must be applied. Pilot studies conducted in Park City Utah found that pyrolusite, a manganese oxide ore, will remove Tl to very low concentrations in the presence of competing ions but because this method is not common, further study was required. This study investigated the mineral composition of the pyrolusite and where, within the material, Tl was held. Calcite is known to accumulate Tl so tests were done looking at Tl accumulation onto pyrolusite with and without calcite on the surface in three water qualities: one with high pH and chlorine (Cl2) and low concentrations of the interfering ions Ca, K, chloride (Cl-) predicted to promote Tl removal, one with low pH and Cl2 and high concentrations of interfering ions predicted to limit Tl removal, and one with a moderate pH used for comparison. The likelihood of this Tl to stay on the media surface with changes in water chemistry was also tested. It was seen that Tl does accumulate in calcite on the media surface. Both pyrolusite media showed a high capacity for Tl and media without calcite exhibited a preference for Tl over K. Calcite dissolved with changes in pH which led to the conclusion that its formation on the media surface must be closely monitored as it may increase the risk Tl release into the drinking water system.

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Moorthy, Kavitha. "EFFECT OF SURFACE ENERGY OF FIBERS ON COALESCENCE FILTRATION." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1185554340.

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Cescon, Anna. "Assessment of alternative filter media in single and dual media configuration for drinking water treatment." Thesis, Glasgow Caledonian University, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743902.

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Books on the topic "Filter media"

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Wahidin, Samsul. Filter komunikasi media elektronika. [Banjarmasin]: Komisi Penyiaran Indonesia Daerah Kalimantan Selatan, 2006.

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Purchas, Derek B. Handbook of filter media. Oxford: Elsevier Advanced Technology, 1996.

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Purchas, Derek B. Handbook of filter media. 2nd ed. Oxford: Elsevier Advanced Technology, 2002.

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Handbook of nonwoven filter media. Oxford: Butterworth-Heinemann, 2007.

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Deshpande, Ravindra. Growing markets for nonwoven filter media. Norwalk, CT: Business Communications Co., 2002.

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No filter. New York: Bloomsbury Publishing, 2018.

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Järvinen, Kimmo. Development of filter media treatments for liquid filtration. Lappeenranta: Lappeenranta University of Technology, 2005.

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Atanasov, Assoc Prof Ljuben, ed. The Reading – Anti-manipulating Filter: Четенето – антиманипулативен филтър. Sofia, Bulgaria: Gaberoff, 2000.

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Knocke, William R. Removal of soluble manganese from water by oxide-coated filter media. Denver, CO: AWWA Research Foundation and the American Water Works Association, 1990.

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Pihlajamäki, Arto. Electrochemical characterisation of filter media properties and their exploitation in enhanced filtration. Lappeenranta, Finland: Lappeenranta University of Technology, 1998.

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Book chapters on the topic "Filter media"

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Dietrich, Hans. "Filter Media." In Dust Collection with Bag Filters and Envelope Filters, 55–179. Wiesbaden: Vieweg+Teubner Verlag, 1988. http://dx.doi.org/10.1007/978-3-663-07900-2_2.

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Bartussek, Jörg. "From Newspaper to News Filter." In Media Management, 43–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-24786-9_5.

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Ostreicher, Eugene A., Todd E. Arnold, and Robert S. Conway. "Charge-Modified Filter Media." In Filtration and Purification in the Biopharmaceutical Industry, 21–40. Third edition. | Boca Raton, Florida : CRC Press, 2019. | Series: Drugs and the pharmaceutical sciences: CRC Press, 2019. http://dx.doi.org/10.1201/9781315164953-2.

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Dorme, Christian, and Mathias Fink. "Matched Filter Imaging Through Inhomogeneous Media." In Acoustical Imaging, 1–8. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4419-8772-3_1.

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Tarleton, E. S., and R. J. Wakeman. "Filter media." In Solid/Liquid Separation, 78–125. Elsevier, 2007. http://dx.doi.org/10.1016/b978-185617421-3/50002-x.

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"FILTER MEDIA." In Water Treatment Unit Processes, 455–66. PUBLISHED BY IMPERIAL COLLEGE PRESS AND DISTRIBUTED BY WORLD SCIENTIFIC PUBLISHING CO., 1997. http://dx.doi.org/10.1142/9781848160798_0030.

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Sutherland, Ken. "Filter Media." In Filters and Filtration Handbook, 41–95. Elsevier, 2008. http://dx.doi.org/10.1016/b978-1-85617-464-0.00002-x.

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Sparks, Trevor, and George Chase. "Filter Media." In Filters and Filtration Handbook, 55–115. Elsevier, 2016. http://dx.doi.org/10.1016/b978-0-08-099396-6.00002-2.

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"Filter Media." In Solid-Liquid Filtration and Separation Technology, 107–52. Weinheim, Germany: Wiley-VCH Verlag GmbH, 2008. http://dx.doi.org/10.1002/9783527614974.ch04.

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Rushton, Albert, and P. V. R. Griffiths. "Filter Media." In Filtration, 163–99. Routledge, 2017. http://dx.doi.org/10.1201/9780203756119-3.

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Conference papers on the topic "Filter media"

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Alderman, Steven, Michael Parsons, Kristina Hogancamp, O. Perry Norton, and Charles Waggoner. "Evaluation of the Effects of Media Velocity on HEPA Filter Performance." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7075.

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Section FC of the ASME AG-1 Code addresses glass fiber HEPA filters and restricts the media velocity to a maximum of 2.54 cm/s (5 ft/min). Advances in filter media technology allow glass fiber HEPA filters to function at significantly higher velocities and still achieve HEPA performance. However, diffusional capture of particles < 100 nm is reduced at higher media velocities due to shorter residence times within the media matrix. Therefore, it is unlikely that higher media velocities for HEPA filters will be allowed without data to demonstrate the effect of media velocity on removal of particles in the smaller size classes. In order to address this issue, static testing has been conducted to generate performance related data and a range of dynamic testing has provided data regarding filter lifetimes, loading characteristics, changes in filter efficiency and the most penetrating particle size over time. Testing was conducted using 31 cm × 31 cm × 29 cm deep pleat HEPA filters supplied from two manufacturers. Testing was conducted at media velocities ranging from 2.0–4.5 cm/s with a solid aerosol challenge composed of potassium chloride. Two set of media velocity data were obtained for each filter type. In one set of evaluations, the maximum aerosol challenge particle size was limited to 3 μm, while particles above 3 μm were not constrained in the second set. This provided for considerable variability in the challenge mass mean diameter and overall mass loading rate. Results of this testing will be provided to the ASME AG-1 FC Committee for consideration in future versions of the HEPA standard. In general, the initial filter efficiency decreased with increasing media velocity. However, initial filter efficiencies were generally good in all cases. Filter efficiency values averaged over the first ten minute of the loading cycle ranged from 99.970 to 99.996%. Additionally, the most penetrating particle size was observed to decrease with increasing media velocity, with initial values ranging from 194 to 134 nm.

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Cermak-Sassenrath, Daniel, Clinton Watkins, and Ben Kenobi. "Media filter access." In The 9th Australasian Conference. New York, New York, USA: ACM Press, 2013. http://dx.doi.org/10.1145/2513002.2513028.

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Galberd, Zachary, and Eric Appelbaum. "Filter Media Options in Renewable Fuels and Edible Oils." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/gdwg6339.

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With the additional capacity being brought on in the biofuel space, additional filter media options must be considered. Adding capacity to the North American Diatomaceous Earth (DE) marketplace is a challenge but perlite and cellulose are viable alternatives. Both Biodiesel and Renewable Diesel are derived from fats and oils. These fats and oils can often present processing challenges due to contaminants that interfere with the efficiency of the reaction which need to be treated with adsorbent clays to protect catalyst activity. The use of DE, perlite or cellulose will improve the performance of the leaf filters, which also improves the performance of safety and polish filters. DE is the most well-known filter aid in this space, the use of perlite and cellulose offers many strategic benefits. Perlite offers greater efficiencies and economies than DE when used as a precoat for the treatment of fats and oils. Cellulose although not the most economical option, offers additional benefits that can counter its higher cost. This presentation looks at perlite and cellulose as alternatives to DE and highlight the benefits of each of them.

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Wang, Lihong, Andreas H. Hielscher, Steven L. Jacques, Dawn V. Stephens, and Frank K. Tittel. "Imaging of Turbid Media with a Spatial Filter." In Advances in Optical Imaging and Photon Migration. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/aoipm.1994.dcwi.288.

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A buried object inside a turbid medium was imaged using a continuous-wave laser of 5-mW output power and a spatial filter. The spatial filter consists of a lens of 4-cm focal length and a pinhole of 10-μm diameter. A lock-in amplifier was used to reduce the noise. An absorbing rod of 2-mm diameter was buried in the center of a 5-cm thick cuvette filled with polystyrene spheres solution. The object was detected with a contrast of 99% when the turbid medium was 20 mean free path thick, and 10% when 30 mean free path thick.

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Haselbach, L. M., J. R. Rath, and B. Werner. "Extended Performance of Media Filter Drains: Existing Media." In International Low Impact Development 2015. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479025.031.

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Haselbach, Liv, Justin Rath, and Maxwell Freimund. "Extended Performance of Media Filter Drains: New Media." In International Symposium on Systematic Approaches to Environmental Sustainability in Transportation. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479285.004.

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Waggoner, Charles A., and Michael S. Parsons. "Factors Influencing the Performance and Lifetime of Fibrous Glass and Metal Media HEPA Filters." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16285.

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High efficiency particulate air (HEPA) filters are used in a variety of nuclear applications as final air treatment units. The design of air filtration systems in nuclear facilities that will function well requires a significant amount of knowledge about the challenge conditions that these filters will be exposed to. Additionally, risk assessments conducted as a review of these systems need also to be based on knowledge of filter challenge parameters during upset conditions that may be used as design basis conditions. This paper presents a summary of findings of factors that influence the performance lifetime of conventional fibrous glass media filters. These factors include aerosol challenge (particle size distributions and mass concentrations), media velocities, wetting conditions, and changes in gas density. These data are correlated to design considerations for new systems and to process upset conditions used in risk assessments, particularly those involving fires. Data from filter testing activities are also compared to filter loading models and to literature information regarding aerosol emission rates from combustion of various materials. Additional data are provided relating the performance of metal media HEPA filters under conditions that exceed maximum ranges for fibrous glass filters. These discussions focus on selection factors between these two categories of filter units.

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Parsons, Michael, Kristina Hogancamp, Steven Alderman, and Charles Waggoner. "HEPA Filter Performance Under Adverse Conditions." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7074.

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This study involved challenging nuclear grade high-efficiency particulate air (HEPA) filters under a variety of conditions that can arise in Department of Energy (DOE) applications such as: low or high RH, controlled and uncontrolled challenge, and filters with physically damaged media or seals (i.e., leaks). Reported findings correlate filter function as measured by traditional differential pressure techniques in comparison with simultaneous instrumental determination of up and down stream PM concentrations. Additionally, emission rates and failure signatures will be discussed for filters that have either failed or exceeded their usable lifetime. Significant findings from this effort include the use of thermocouples up and down stream of the filter housing to detect the presence of moisture. Also demonstrated in the moisture challenge series of tests is the effect of repeated wetting of the filter. This produces a phenomenon referred to as transient failure before the tensile strength of the media weakens to the point of physical failure. An evaluation of the effect of particle size distribution of the challenge aerosol on loading capacity of filters is also included. Results for soot and two size distributions of KCl are reported. Loading capacities for filters ranged from approximately 70 g of soot to nearly 900 g for the larger particle size distribution of KCl.

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Alvin, M. A. "Assessment of Ceramic and Metal Media Filters in Advanced Power Systems." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0574.

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Advanced, coal- and biomass-based gas turbine power generation technologies (IGCC, PFBC, PCFBC, HIPPS) are currently under development and demonstration. Efforts at the Siemens Westinghouse Power Corporation (SWPC) have been focused on the development and commercialization of hot gas filter systems as an enabling technology for power generation. As part of the commercialization effort, SWPC has been actively involved in the development of advanced filter materials and component configuration, has participated in numerous surveillance programs characterizing the material properties and microstructure of field tested filter elements, and has undertaken an extended accelerated filter life testing program. This paper reviews SWPC’s material and component assessment efforts, identifying the performance, stability, and life of porous oxide- and nonoxide-based ceramic, as well as metal and intermetallic filters used in advanced, high temperature, coal combustion systems.

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Gahr, Thomas C. "Corrugated Flute Filter Media Packaging Reduces Combustion Turbine Intake Air Filter System Size by 40%." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53558.

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Gas turbine output and mass flow have increased significantly over the years. The current generation of self cleaning air filter systems are large and complex, occupying a great deal of space, and requiring significant amounts of field assembly. A new filter technology developed for gas turbine intake air systems allows for the same high efficiency self cleaning performance to be achieved with a system that has a 40% smaller three dimensional footprint. This new corrugated flute filter media packaging technology not only reduces the size of the intake filter system, but can also reduce the complexity of the installation, shorten field installation time, and reduce the total cost of shipping by up to 50%. The key to this size reduction is a new way to package the filter media that allows for twice the airflow per filter at the same initial pressure loss and filtration efficiency as the current industry standard self cleaning filter systems. This paper will discuss the benefits of corrugated flute filter media packaging, and highlight the size reduction possible in the self cleaning air intake system. The resulting advantages are documented through laboratory and field experience.

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Reports on the topic "Filter media"

1

Thompson, Robert C., Harry S. Miley, and Richard J. Arthur. Filter Media Recommendation Review. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/890735.

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MD Hoover, AF Fencl, and GJ Vargo. Independent Evaluation of Air Filter Media from Chornobyl. Office of Scientific and Technical Information (OSTI), December 1999. http://dx.doi.org/10.2172/15179.

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Hoover, Mark D., Alice F. Fencl, and George J. Vargo. Independent Evaluaton of Air Filter Media From Chornobyl. Office of Scientific and Technical Information (OSTI), September 1999. http://dx.doi.org/10.2172/965239.

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M D ANDERSON CANCER CENTER HOUSTON TX. Evaluation of Elastomeric Polymer Filter Media. Volume II: Appendices. Fort Belvoir, VA: Defense Technical Information Center, December 1995. http://dx.doi.org/10.21236/ada386769.

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Poirier, M., D. Herman, and R. Bhave. EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER. Office of Scientific and Technical Information (OSTI), September 2011. http://dx.doi.org/10.2172/1024873.

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Haslam, Jeff J. Prototype Ceramic HEPA Filter Testing and Filter Media Research and Development for Nuclear Facility Ventilation. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1544515.

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Haslam, J. J. Prototype Ceramic HEPA Filter Testing and Filter Media Research and Development for Nuclear Facility Ventilation. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1566030.

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Haslam, J. J. Prototype Ceramic High Efficiency Particulate Air Filter Testing and Filter Media Development for Nuclear Facility Ventilation. Office of Scientific and Technical Information (OSTI), December 2018. http://dx.doi.org/10.2172/1490936.

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Fowley, M. EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER, PHASE 2. Office of Scientific and Technical Information (OSTI), July 2012. http://dx.doi.org/10.2172/1049528.

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Quaderer, Jamie, Michael J. Richards, Larry Sierpien, and Frank Margrif. Lab Test of Prototype HMMWV Filter Elements Constructed with Spunbond Polyester Media. Fort Belvoir, VA: Defense Technical Information Center, July 2001. http://dx.doi.org/10.21236/ada396804.

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