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Dissertations / Theses on the topic 'Air filters'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sharma, Amit. "Penetration, pressure drop, and wicking characteristics of NIOSH certified P-100 and P-95 filters under heavy DOP loading." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1365.

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Thesis (M.S.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xii, 233 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 125-128).

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2

Tousi-Ardakani, Saied. "Numerical investigation of particle collection in electrically enhanced fibrous filters /." Access abstract and link to full text, 1986. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8702930.

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3

Tsang, Chang Ming. "Analysis of pleated air filters using computational fluid dynamics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ29434.pdf.

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4

Butler, Jessica Caroline Curtis Patricia A. "The effects of electrostatic polarization ultra-violet light filters on the bioaerosols of a commercial broiler processing plant hang room." Auburn, Ala., 2009. http://hdl.handle.net/10415/2010.

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5

Kennedy, Daniel Mabry Tatarchuk Bruce J. "Fuel cell cathode air filters methodologies for design and optimization /." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2006%20Fall/Theses/KENNEDY_DANIEL_34.pdf.

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6

Nordstrom, Jeanne McDonald 1957. "The utility of using matched weight PVC filters during air sampling for particulates." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276824.

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Matched weight polyvinyl chloride (PVC) filters are currently available for use in total dust air sampling. This paper studies the utility of employing two superimposed filters in a cassette. Cassettes containing "paired" PVC filters were employed, in the same way matched weight filters would be used, during side by side sampling studies with cassettes housing single PVC filters, to determine whether the presence of two filters in a cassette presented problems during sampling. The effects of dust type, particle breakthrough, moisture concentration, and increased pressure drop from the addition

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7

Oh, Seung-Min. "Nonlinear Estimation for Vision-Based Air-to-Air Tracking." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19882.

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Unmanned aerial vehicles (UAV's) have been the focus of significant research interest in both military and commercial areas since they have a variety of practical applications including reconnaissance, surveillance, target acquisition, search and rescue, patrolling, real-time monitoring, and mapping, to name a few. To increase the autonomy and the capability of these UAV's and thus to reduce the workload of human operators, typical autonomous UAV's are usually equipped with both a navigation system and a tracking system. The navigation system provides high-rate ownship states (typically ownshi

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8

Martin, Tifenn. "Air-Filled Substrate Integrated Waveguide (AFSIW) Filters and multiplexers for space application." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0391.

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L'émergence de nouvelles applications micro-ondes et millimétriques dans les secteurs de l'automobile et des communications, y compris l'Internet des objets (IoT), la cinquième génération de mobile (5G) et le nouvel espace, nécessite le développement de nouvelles technologies alternatives offrant un compromis approprié en termes de taille, de poids, de puissance et de coût (SWaP-C). Ce changement de paradigme est essentiellement dû à l'augmentation du débit de données, conduisant à la croissance des différentes bandes passantes. Étant donné qu'un nombre de plus en plus important de systèmes so

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9

Kornelius, Gerrit. "The design of electrostatically augmented moving bed granular gas filters." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-05052005-095030/.

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10

Kruger, Abraham J. "The impact of filter loading on residential hvac performance." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50344.

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Buildings are the primary user of energy in the USA. Within homes, the heating, ventilation, and air condition (HVAC) system is the largest energy consumer. This study: (i) developed a new methodology for simulating filter loading in-situ; (ii) observed the impact of filter loading on AC performance in-situ; and (iii) provided a greater understanding of when a filter is “dirty” and should be replaced. Six central AC systems in the Atlanta metro-region were evaluated. Filter loading was simulated by installing the TrueFlow® airflow metering device and partially taping off the face at 3 differen

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11

Greenshields, Christopher John. "Fast brittle fracture of water/air pressurised plastic pipes." Thesis, Imperial College London, 1995. http://hdl.handle.net/10044/1/8690.

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12

Ali, Salah Taofeek. "The motion of air cavities in water filled pipes." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305002.

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13

Maddineni, Ajay Kumar. "Particle filtration behaviour of oil-treated fibrous air filters for automotive engine intake application." Thesis, IIT Delhi, 2018. http://eprint.iitd.ac.in:80//handle/2074/8030.

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14

Bojdo, Nicholas Michael. "Rotorcraft engine air particle separation." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/rotorcraft-engine-air-particle-separation(6c4c7788-1244-45b7-b35e-acc9ae54cacd).html.

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The present work draws together all current literature on particle separating devices and presents a review of the current research on rotor downwash-induced dust clouds. There are three types of particle separating device: vortex tube separators; inlet barrier filters; and inlet particle separators. Of the three, the latter has the longest development history; the former two are relatively new retrofit technologies. Consequently, the latter is well-represented in the literature, especially by computational fluid dynamics simulations, whereas the other two technologies, with specific applicati

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15

Hill, Barry Keith. "Field portable X-Ray fluorescence for rapid analysis Of titanium dioxide on air filters." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/3312.

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Field portable x-ray fluorescence (FPXRF) was evaluated as a method for screening titanium dioxide (TiO2) on air filters. Mixed cellulose ester (MCE) and polycarbonate (PC) filter types were compared to gravimetric filters to determine if there was a benefit of using one over the other during FPXRF analysis. No significant difference (p-value = 0.92) was found between MCE and PC filters for FPXRF. MCE filters had a higher coefficient of determination (R2 = 0.97) with the FPXRF analyzer than the PC filters (R2 = 0.70) when compared to gravimetric filter results. The limit of detection (LOD) and

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16

Luna, Eric Amor Tatarchuk Bruce J. "Improvement of indoor air quality through the development of polymeric microfibrous material." Auburn, Ala., 2009. http://hdl.handle.net/10415/1997.

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17

Gregg, Andrea. "The application of nanofibrous membranes with antimicrobial agents as filters." Kansas State University, 2010. http://hdl.handle.net/2097/6822.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Julia A. Keen<br>Nanofibers are classified as fibers less than 1 micrometer in diameter. These fibers can be layered to form nanofibrous membranes, and these membranes offer great potential in the filtration industry. The membranes' smaller fiber diameters and pore sizes permit such filters to filter out more and smaller particulate. Additionally, antimicrobial agents can be incorporated into the membrane to inhibit fungal and bacterial growth on the membrane’s surface. This report evaluates nanofibrou

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18

Viktorin, Michal. "Filtrace vzduchu v systémech vzduchotechniky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-394044.

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The diploma thesis is divided into three parts, analysis of the topic and the chosen method of solutions, application to specified building and experimental solutions and data processing The first part is theoretical. It is about air filtration in terms of normative and legal requirements and variants of technical solutions for air filtration. In the second part there are two technical solutions for HVAC systems for plastic surgery. The third part is experimental. It is the measurement of the number of particles in the air in the operating room and the evaluation of the measurement.

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19

Alarfaj, Ayman M. A. "Validation of Low Resistance Filters for Gas/Vapour Sampling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4257.

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Traditional occupational hygiene assessment of occupational exposures to organic gases and vapours rely on low flow (<200 ml/min) NIOSH sorbent tubes. This work investigates 3M charcoal filter media (JK50 and JK40, 3M, Inc.) for collection and analysis of organic vapours across 0.1 ¿ 5 l/min. To enable this work, a custom exposure facility was constructed and validated within which organic analyte gas/vapour concentrations could be introduced at known concentrations while controlling environmental variables such as temperature and humidity and other variables. This facility enabled experiments

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Alarfaj, Ayman Mohammed Abdullah. "Validation of low resistance filters for gas/vapour sampling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4257.

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Traditional occupational hygiene assessment of occupational exposures to organic gases and vapours rely on low flow (<200 ml/min) NIOSH sorbent tubes. This work investigates 3M charcoal filter media (JK50 and JK40, 3M, Inc.) for collection and analysis of organic vapours across 0.1-5 l/min. To enable this work, a custom exposure facility was constructed and validated within which organic analyte gas/vapour concentrations could be introduced at known concentrations while controlling environmental variables such as temperature and humidity and other variables. This facility enabled experiments d

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21

Schomburg, Rolf. "Evaluation of methods for detecting endotoxin on filters of heating-, ventilation- and air-conditioning systems." [S.l.] : [s.n.], 2003. http://www.diss.fu-berlin.de/2003/250/index.html.

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22

Berglund, Joel. "THE PROSPECT OF LIVING FILTERS : Reducing building sector energy demands by improving indoor air quality." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148548.

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Today people spend all the more time indoors. Asthma, allergies and Sick Building Syndrome (SBS) are affecting an increasing number of people. The remedy for all these affections has long been to increase the volume flow of outdoor air in the ventilation but at the same time cities all over the world are struggling with air pollution and smog rising above endangering levels. Living filters present a new solution where part of the indoor air can be purified and recirculated in a building. This project has compiled research on the area to describe the how and why concerning air purification by p

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23

Ghochaghi, Negar. "EXPERIMENTAL DEVELOPMENT OF ADVANCED AIR FILTRATION MEDIA BASED ON ELECTROSPUN POLYMER FIBERS." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3631.

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Electrospinning is a process by which polymer fibers can be produced using an electrostatically driven fluid jet. Electrospun fibers can be produced at the micro- or nano-scale and are, therefore, very promising for air filtration applications. However, because electrospun fibers are electrically charged, it is difficult to control the morphology of filtration media. Fiber size, alignment and uniformity are very important factors that affect filter performance. The focus of this project is to understand the relationship between filter morphology and performance and to develop new methods to c

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24

Murki, Sai Rohith, and Yaswanth Puttagunta. "CFD Simulation of an Activated Carbon Filter." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13839.

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In various industries, specialized filters with activated carbon are used for adsorbing mercury from air-flows. MRT has eight such Activated CarbonFilters (ACFs) in one of their devices. The main purpose of research is tostudy the flow in the ACF filter and suggest a mathematical model for the complete system through which an improved design can be found.Simulation of a single ACF illustrates how the current system’s air flow does not cover the whole filter leaving part of the carbon bed unused forthe adsorption. This is validated by experimental data. A theoretical studybased on a mathematica

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25

Kumar, Anil. "Estimation and Mapping of Ship Air Wakes using RC Helicopters as a Sensing Platform." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/82910.

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This dissertation explores the applicability of RC helicopters as a tool to map wind conditions. This dissertation presents the construction of a robust instrumentation system capable of wireless in-situ measurement and mapping of ship airwake. The presented instrumentation system utilizes an RC helicopter as a carrier platform and uses the helicopter's dynamics for spatial 3D mapping of wind turbulence. The system was tested with a YP676 naval training craft to map ship airwake generated in controlled heading wind conditions. Novel system modeling techniques were developed to estimate the dyn

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26

Abbass, Omed Akber. "Ozone Interaction with Indoor Building Materials and HVAC Filters." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3771.

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As modern life develops, humans spend most of their time inside buildings. Understanding the effects of different building materials that exist indoors on indoor air quality is crucial to ensure comfort, health, and productivity of building occupants. Indoor air quality (IAQ) is an important field of building science that focuses on studying the existence of different compounds indoors. These compounds include: airborne particles such as dust, volatile organic compounds (VOCs) such as carbonyls, reactive gases such as radon, ozone and others. Ozone is a strong oxidant gas that has adverse effe

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27

Szabó, Zoltán. "Příspěvek k optimální syntéze filtračních obvodů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-233563.

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The presented dissertation thesis is focused on the optimization of filtering circuit synthesis. In the five main sections of this work, the author analyzes partial problems related to several areas within the synthesis of modern filtering circuits. The first chapter constitutes an examination of elementary aspects which characterize present-day integrated circuits in voltage feedback operational amplifiers, and this main content is further complemented with a view on possible application of these circuits for the designing of filtering circuits as proposed within subsequent parts of the thesi

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28

Kuntz, Thomas James. "Campylobacter jejuni and Salmonella spp. Detection in Chicken Grow Out Houses by Environmental Sampling Methods." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/42526.

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Campylobacter and Salmonella are foodborne pathogens commonly associated with raw poultry. Although there has been much research done on isolating these pathogens from poultry production environments using cloacal swabs, fecal samples, intestinal tract contents and dissection, research involving environmental sampling has been limited. New and/or improved environmental sampling methods may provide an easy, convenient, and less time-consuming way to collect samples. Coupling these sampling methods with PCR may provide a relatively simple, rapid, and robust means of testing for foodborne patho

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29

Jamriska, Milan. "The effect of ventilation and air filtration on reduction of indoor concentration to submicrometer airborne particulates." Thesis, Queensland University of Technology, 2000.

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30

Ames, Robin W. "Analysis of a 2007 EPA compliant diesel particulate matter sampling system." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5245.

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Thesis (M.S.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains xv, 133 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-95).

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31

Hamann, Martin Louis. "System hydrodynamics to reduce fouling of air-sparged immersed flat-sheet microfiltration membranes." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5206.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Immersed membrane systems hold many operational and environmental advantages in biological treatment of wastewater. However, immersed membrane filtration have only found application in niche markets to date because of higher capital and operating costs associated with membrane fouling. But with capital costs on the decline as membranes become less expensive, immersed membrane systems are increasingly considered as an attractive alternative to conventional treatment processes. Operating costs rema

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32

Mysen, Mads. "Ventilation systems and their impact on indoor climate and energy use in schools : studies of air filters and ventilation control." Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1740.

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33

Magoha, Paul W. "Incident-response monitoring technologies for aircraft-cabin air quality." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/14187.

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Doctor of Philosophy<br>Department of Mechanical Engineering<br>Steven J. Eckels<br>Byron W. Jones<br>Poor air quality in commercial aircraft cabins can be caused by volatile organophosphorus (OP) compounds emitted from the jet engine bleed air system during smoke/fume incidents. Tri-cresyl phosphate (TCP), a common anti-wear additive in turbine engine oils, is an important component in today’s global aircraft operations. However, exposure to TCP increases risks of certain adverse health effects. This research analyzed used aircraft cabin air filters for jet engine oil contaminants and designe

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34

Дроздова, Ольга Сергіївна, Ольга Сергеевна Дроздова, Olha Serhiivna Drozdova та О. В. Нагорнєв. "Сучасні апарати очищення повітря від забруднювальних речовин зварювального виробництва". Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/45321.

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При виконанні зварювальних робіт в повітря виділяється зварювальний аерозоль, у складі якого містяться оксиди металів у вигляді твердих частинок і газоподібні сполуки . Аерозоль, яка утворюється, характеризується дрібною дисперсністю – швидкість витання часток не перевищує 0,1 м/с. Сучасні апарати, які здатні вловлювати таке забруднення, представлені фільтрами, в основному, лектростатичними та механічними, з ефективністю очищення більше 90%.

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35

Bosák, Jan. "Teoretické využití nanotechnologie pro filtraci ve vzduchotechnice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239959.

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Thesis solves problems using the nanotechnology for air filtration in HVAC systems. Main specialization work is air filtration for clean spaces with high classes of purity. For example Hospitals, sophisticated technology service, pharmacy etc. Thesis is devide for three parts. First part contains foundation infromations about theory and making fabrics by nanotechnology. Next I described laws of physics, That were using during the solving filtration´s issues. Goal for second part was making the experiments, which should show abilities and properties nanofilters during the air filtration in real

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Гашинська, А. С., та І. В. Коц. "Конструктивне застосування шлюзів у чистих приміщеннях". Thesis, ВНТУ, 2018. http://ir.lib.vntu.edu.ua//handle/123456789/23506.

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У даній доповіді висвітлюється питання створенню чистих приміщень, які забезпечують стерильність і високоефективного уникнення пилу<br>This report covers the issue of creating clean rooms that provide sterility and highly effective dust avoidance

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37

Chaves, Karina Oliveira. "Desenvolvimento e aplicaÃÃo de sistema de Floco-FlotaÃÃo por Ar Dissolvido para tratamento de Ãgua de lavagem do filtro da ETA GaviÃo." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8123.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>No cenÃrio brasileiro, os resÃduos de EstaÃÃes de Tratamento de Ãgua (ETAs) sÃo normalmente lanÃados in natura em corpos hÃdricos, apresentando-se como potencialmente danosos ao meio ambiente, sendo necessÃrio tratÃ-los para que sejam descartados conforme os aspectos legais. Estudos demonstram que a tecnologia da FlotaÃÃo por Ar Dissolvido (FAD) tem sido viÃvel para este fim. Acredita-se que a incorporaÃÃo da floculaÃÃo em cortinas numa mesma unidade de flotaÃÃo possa promover elevada eficÃcia ao sistema, traduzindo-se como uma i

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Shirkovskiy, Pavel. "Conjugaison de phase ultrasonore pour la vélocimétrie des écoulements gazeux : investigations des potentialités en micro-fluidique." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00604511.

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La conjugaison de phase ultrasonore à couplage par l'air basée sur une céramique magnétostrictive et une membrane de filtration poreuse pour la microscopie et la vélocimétrie de micro écoulements a été développée. Dans ce but, dans le cadre de l'acoustique géométrique un système d'équations pour décrire mathématiquement le passage par l'interface entre l'élément actif du système de conjugaison de phase confocale - milieu de propagation a été développé.On a développé et réalisé une technique de codage de phase par m-séquence pour l'enregistrement des faibles signaux conjugués en phase. Cette te

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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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Spinelle, Laurent. "Microsystèmes capteurs de gaz sélectifs au dioxyde d'azote associant structures semi-conducteurs et filtres chimiques (indigo ou/et nanomatériaux carbonés) destinés au contrôle de la qualité de l'air." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00741969.

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Ce manuscrit est consacré à l'étude et au développement de microsystèmes capteurs de gaz sélectifs au dioxyde d'azote, destinés au contrôle de la qualité de l'air atmosphérique. La stratégie que nous avons développée consiste à associer une structure sensible à base de matériaux semi-conducteurs partiellement sélectifs aux gaz oxydants et des filtres sélectifs à l'ozone. L'objectif premier est la mise en oeuvre et la caractérisation de matériaux chimiques strictement imperméables à l'ozone (O3) et non-réactifs vis-à-vis du dioxyde d'azote (NO2). Notre choix s'est focalisé sur un matériau moléc

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41

Dhordain, Hélène. "Fonctionnalisation d’une structure nontissée par la cyclodextrine pour l’élaboration d’un filtre textile biocide." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10194/document.

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La menace d’une pandémie mondiale (du type H1N1) amène nos sociétés à se protéger des microorganismes infectieux. Différentes solutions permettent de se protéger de ces microorganismes. En dehors de la vaccination et autres prophylaxies, il existe des moyens de protection individuelle ou collective qui consistent à filtrer l’air respiré pour en extraire les aérosols infectieux. L’objet de cette thèse a consisté à élaborer une structure textile filtrante pourvue de propriétés biocides. Dans un premier temps, le textile a été fonctionnalisé par la cyclodextrine, molécule cage connue pour ses pro

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Forthomme, Audrey. "Caractérisation du comportement des aérosols microbiens dans les réseaux de ventilation d'espaces occupés." Phd thesis, Ecole des Mines de Nantes, 2012. http://tel.archives-ouvertes.fr/tel-00782957.

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La qualité microbienne de l'air intérieur représente un enjeu sanitaire important, notamment dans le secteur professionnel. Ces travaux de thèse ont permis d'étudier les conditions favorisant le développement des espèces microbiennes collectées sur des médias fibreux utilisés dans des CTA, ainsi que leur réentrainement an aval de la filtration, susceptible de dégrader la qualité de l'air. La première partie de l'étude s'est déroulée en laboratoire à partir de la filtration d'un consortium bactérien - fongique composé de Staphylococcus epidermidis et Penicillium oxalicum. L'influence de trois p

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Bourrous, Soleiman. "Étude du colmatage des filtres THE plans et à petits plis par des agrégats de nanoparticules simulant un aérosol de combustion." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0301/document.

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Dans les installations nucléaires, les particules en suspension sont le vecteur d’une grande partie de la contamination radiologique. Pour cette raison, l'IRSN (Institut de Radioprotection et de Sûreté Nucléaire) étudie les filtres THE (Très Haute Efficacité) plissés qui sont l'un des dispositifs permettant assurer la sécurité de l'exploitation nucléaire. Pour éviter les rejets dans l'environnement, la compréhension du comportement des filtres en particulier dans la situation accidentelle doit être aussi exhaustive que possible. L'accident le plus probable et le plus pénalisant pour les dispos

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Matula, Tomáš. "Techniky umělé inteligence pro filtraci nevyžádané pošty." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2014. http://www.nusl.cz/ntk/nusl-236060.

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This thesis focuses on the e-mail classification and describes the basic ways of spam filtering. The Bayesian spam classifiers and artificial immune systems are analyzed and applied in this thesis. Furthermore, existing applications and evaluation metrics are described. The aim of this thesis is to design and implement an algorithm for spam filtering. Ultimately, the results are compared with selected known methods.

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Niu, Hejingying, and 牛何晶英. "Nitric oxide removal by wastewater bacteria in a biotrickling filter." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50533885.

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Nitric oxide (NO) is one of the most important air pollutants in atmosphere mainly emitted from combustion exhaust gas. In this research, a biotrickling filter was designed and operated to remove this pollutant from an air stream using bacteria extracted from the sewage sludge of a municipal sewage-treatment plant. The bacteria were cultured and enriched by either petri dish’s cultivation or liquid cultivation. The adsorption capacity of the ceramic material, which was used as the packing material, was determined to be 34 g-NO/L under 37℃. However, the saturated adsorption capacity of the pac

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Venturini, Giacomo. "Design of experiment analysis of air filter performance for helicopter applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Helicopters are used in different situations and in extremely various environments. Sometimes they land or take off to or from rough landing sites where dust, sand and other materials are present. One of the major problem for helicopters engine is the ingestion of these materials. This problem can be solved by using a filter positioned at the engine intake. The filtration in helicopters is a recent development because, until recent times, research in this field was considered non-profitable and downplayed. Filtration is closely connected with engine efficiency and, in recent years, it has bee

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Malmborg, Petter. "Engine air filter requirements : How different running conditions affect service life." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-74614.

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The internal combustion engine requires clean air in order to operate without problems the entire service life. The air filter acts as a barrier between the ambient air ridden with particulate matter, and the sensitive interior of the engine. Several factors affect the air filter performance, such as pressure drop, efficiency, and dust holding capacity. Many external factors affect the air filter too, such as driving style, engine type, if the car is equipped with hybrid propulsion et cetera. The scope for this thesis work aims to extend the knowledge of air filtration for the customer, in thi

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Zoogman, Peter William. "Geostationary satellite observations of ozone air quality." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11109.

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Ozone in surface air is the primary cause of polluted air in the United States. The current ozone observing network is insufficient either to assess air quality or to fully inform our understanding of the factors controlling tropospheric ozone. This thesis investigates the benefit of an instrument in geostationary orbit for observing near surface ozone using Observing System Simulation Experiments (OSSEs).<br>Earth and Planetary Sciences

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Mehdizadeh, Seyedeh Neda. "Drop Motion and Modeling of the Saturation within Depth Coalescing Filter." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1607007315571927.

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Bandaly, Victor. "Etude de la persistance de virus sur les filtres des centrales de traitement d'air : influence des paramètres de procédé et impact sur la santé." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1B038/document.

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La pollution de l'air est l'un des principaux problèmes de santé publique de notre siècle et surtout de l'air intérieur alors que nous passons environ 90% de notre temps dans des environnements fermés. Parmi les polluants les bioaérosols ont été peu étudiés. Cependant des études épidémiologiques ont déjà montré une relation entre les bioaérosols et la santé. Le but de cette thèse est d’étudier les virus respiratoires dans les milieux clos via les systèmes de ventilation. A l’issue d’un état de l’art des polluants de l’air, il est important de définir ceux nécessitant d’être traités, les systèm

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