Tesi sul tema "Recycling"
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Sidique, Shaufique Fahmi. "Analysis of recycling behavior, recycling demand, and effectiveness of policies promoting recycling". Diss., Connect to online resource - MSU authorized users, 2008.
Cerca il testo completoSolis, Martyna. "Potential of chemical recyclingto improve the recycling of plastic waste". Thesis, KTH, Energi och klimatstudier, ECS, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232339.
Testo completoKemisk återvinning har potentialen att öka återvinningsgraden av plastförpackningar och minska därmedminska klimatpåverkan från fossila plastprodukter. Således ses den som en möjlig teknik för att mötautsläpps- och återvinningsmål samt införandet av en cirkulär ekonomi. I ett svenskt sammanhang kan detbidra till att nå målet om netto noll utsläpp 2045. Denna uppsats syftar till att undersöka potentialen förkemisk återvinning i det svenska återvinningssystemet för plast, med det avfallseldade Bristaverket somfallstudie. Avhandlingen beskriver ingående led i den nuvarande svenska plaståtervinningssystem ochkvantifierar materialförluster i alla steg. Återvinningsgraden för plastförpackningar i hushållsavfalleti Stockholm visar sig vara lägre än 7%. Återstående 93% skickas för energiåtervinning genom förbränning.Analysen av olika teknologier för kemisk återvinnings genomförs med hjälp av Technology ReadinessLevel (TRL). Resultatet visar att det fanns tre teknologier med högsta TRL på 9: termisk krackning(pyrolys), katalytisk krackning och konventionell förgasning. Viktiga parametrar för kemisk återvinningkopplat till en befintlig anläggning diskuteras och används för genomförbarhetsanalys av de tre valdateknologierna genom en fallstudie vid Bristaanläggningen. Det är inte uppenbart vilken teknik som är denbästa för denna applikation. Förgasning är bevisat framgångsrik för produktion av intermediära produkter(olja eller syngas) som kan användas för ny plastproduktion, men Bristaanläggningens storlek är för litenför att en förgasningsanläggning ska varamotiverad. Pyrolys och katalytisk krackning kan användasi mindre applikationer, men de har hittills inte lyckats bidra till framställning av ny plast. Därför skullebåda teknikerna kräva ytterligare forskning och test på pilotskala innan de skalas upp till kommersiell drift.Resultaten från denna studie måste följas av en djupgående analys av verklig data, från pilotprojekt ellerkommersiella projekt, som för närvarande inte är tillgänglig.De stora utmaningarna för att genomföra kemisk återvinning av plastavfall i Sverige är av ekonomisk ochpolitisk karaktär. Nyckeln till framgångsrik spridning av kemisk återvinning är utvecklingen av enaffärsmodell som säkerställer att alla aktörer längs plaståtervinningskedjan kan dra ekonomiskt fördel avlösningen. För en anläggning i Brista finns utmaningar i form av Stockholm Exergis otillräckliga expertisinom området kemisk återvinning, osäkra råvarukrav och en utmanande marknadssituation.
Obermüller, Stefanie. "Recycling der Sauren Lysosomalen Phosphatase Eingrenzung der recycling-vermittelnden Aminosäuresequenz und Untersuchungen möglicher Sortierungsfaktoren, die zur Umsetzung des Recyclings benötigt werden /". [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=96367272X.
Testo completoБашлак, Ірина Анатоліївна, Ирина Анатольевна Башлак, Iryna Anatoliivna Bashlak, S. P. Baranov e О. V. Perepadya. "Recycling glass". Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/15994.
Testo completoVoytyuk, Nazariy. "Recycling of Polypropylene and Polyamide Blends Using Thermomechanical Recycling". Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277883.
Testo completoSyftet med avhandlingen var att återvinna en vanlig matta som innehåller polyamid-6- och polypropenpolymerer med termomekanisk återvinning och jämföra produkten med rena polymermaterial. Det återvunna materialet tillverkades med den termomekaniska processen som inkluderar malning och strängsprutning (extrudering). Filamentet analyseras med olika analystekniker inklusive FTIR, SEM, DSC och dragprovning för mekaniska egenskaper. Filamentet testas sedan med en 3D-skrivare för att se om en produkt kan tillverkas av materialet. Filamentet med återvunnen matta användes för att skapa en 3D-skriven produkt, därför verkar metoden lovande. Resultaten från analysteknikerna visade polymererna bröts ner efter flera återvinningscykler, mestadels av PA6-polymeren. De mekaniska egenskaperna med tillsats av återvunnet matta till en blandning av rena material visar liknande egenskaper jämfört med endast rena material. Sammanfattningsvis är det möjligt att 3D-skriva med återvunnet mattfilament för att skapa en 3D-skriven produkt, metoden verkar lovande.
Boeckx, W. D. "Recycling spare parts". Maastricht : Maastricht : Maastricht University ; University Library, Maastricht University [Host], 1999. http://arno.unimaas.nl/show.cgi?fid=13042.
Testo completoSoe-Lin, Shan. "Macrophage iron recycling". Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66717.
Testo completoLa majorité du fer dans le corps humain est contenu dans la masse de globule rouge, en tant que composante de l'hémoglobine. Les GR deviennent plus endommagés et moins déformables en vieillissant, et à la fin de leurs durée de vie de 120 jours, les GR sénescents sont ingurgités par les macrophages du système réticuloendothélial du foie et de rate. Ces macrophages spécialisés ingèrent 2 millions de GR∕sec, catabolisent l'hémoglobine et relâche le fer qui y est contenu à la transferrine plasmatique pour permettre son réincorporation dans de nouveau GR dans la moelle épinière. C'est remarquable comment les macrophages réticuloendothéliaux gèrent de manière sécuritaire l'énorme quantité de fer qui serait sinon toxique pour les autres cellules. Dans mes recherches, j'ai examiné les aspects spécifiques du métabolisme du fer dans ces macrophages spécialisés dans sa manutention.La protéine associée à la résistance naturelle du macrophage (Nramp1) est un transporteur de métaux divalents exprimé seulement dans les phagosomes de cellules phagocytiques telle que les macrophages et les neutrophiles. Nramp1 a depuis été reconnu comme le gène responsable de conférer à l'hôte la résistance contre les pathogènes intracellulaires. Nramp 1 est présumé donner une protection en vidant le phagosome de métaux divalents nécessaires à la croissance de pathogènes.Au cours des recherches nous avons trouvé qu'en plus de jouer un rôle significatif dans la résistance de l'hôte, Nramp1 est aussi important pour la régularisation de l'homéostasie du fer. Nous avons remarqué que les macrophages sans Nramp1 sont incapables de recycler le fer (après l'erythrophagocytose in vitro) de manière aussi efficace que les macrophages qui ont le Nramp1 fonctionnel. On a ensuite observé les souris knockout et trouvé que les animaux sans Nramp1 ont une surdose progressive de fer en vieil
Włodarz, Marta. "Intelligent recycling database". Thesis, Видавництво СумДУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/13125.
Testo completoAnsari, Rushina. "Creative Paper Recycling". Thesis, Malmö högskola, Fakulteten för kultur och samhälle (KS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-23795.
Testo completoRock, Channah, Jean E. McLain e Daniel Gerrity. "Water Recycling FAQs". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/225869.
Testo completoSantoro, Amanda. "Recycling as play: encouraging recycling through a participatory design process with children". Kansas State University, 2016. http://hdl.handle.net/2097/32708.
Testo completoLandscape Architecture/Regional and Community Planning
Jason S. Brody
Recycling in many cities faces dilemmas with accessibility and education, especially within the public realm, which leads to a lack of participation in this sustainable activity. The City of Kansas City, Missouri does not currently provide recycling solutions for multi-family and commercial businesses and has minimal to non-existent recycling infrastructure within its downtown’s public realm. Envisioning a new recycling system for a city requires many entities to come together in the design process. However, the city, landscape architects, and other designers frequently overlook incorporating children into the participatory community design process, even though children have knowledge, experiences, and ideas to offer (Speak, 2000). Incorporating many avenues of community input can benefit the design outcomes, and children should be included in the participatory design process when it engages their built environment. The Kansas City Design Center (KCDC) produced a vision plan and conceptual site designs for downtown Kansas City’s recycling system. Community input was part of the KCDC studio project’s design process by utilizing a series of advisory council meetings, professional reviews, and open houses. This report integrated another form of community involvement into the project by working with children on designing urban space and playful infrastructure focused on encouraging participation in recycling. A series of design charrettes were conducted with 5th grade students from Kansas City’s urban charter school Crossroads Academy due to the school’s focus on immersion in the urban environment. The students’ design charrette ideas added a new perspective to how urban space and recycling infrastructure could encourage participation. These ideas and perspectives were shared with classmates and utilized to further design development in the recycling project's streetscape "Links" strategy. As the project developed, the researcher observed how the children's ideas impacted the "Links" strategy design coming through in playful ground plane designs, interactive elements, concepts of place-making, and considerations for a variety of users. The participatory process with the children was most influential on those involved directly with the children's process. This allowed the children's ideas to become inherent base knowledge when designing. Engaging youth’s imaginative minds in the design process for urban space and recycling infrastructure sparked new playful perspectives on how to encourage participation and led to meaningful recycling design outcomes within the public realm.
Lim, Boon Hock. "The kerbside recycling dilemma /". Title page, table of contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09ENV/09envl732.pdf.
Testo completoMoore, Margaret. "Recycling of Russian empires /". Title page, abstract and table of contents only, 1999. http://web4.library.adelaide.edu.au/theses/09ARM/09armm823.pdf.
Testo completoZamudio-Ramírez, Pável. "Economics of automobile recycling". Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10976.
Testo completoIncludes bibliographical references.
by Pável Zamudio-Ramírez.
M.S.
Shevchenko, Tetiana Ivanivna, Татьяна Ивановна Шевченко e Тетяна Іванівна Шевченко. "Recycling of natural resources". Thesis, Видавництво СумДУ, 2007. http://essuir.sumdu.edu.ua/handle/123456789/12809.
Testo completoMattsson, Agnes-Matilda, Towa Eriksson, Caroline Löwnertz e Marielle Holmbom. "Recycling of Prussian White". Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445281.
Testo completoBrommer, Tracey H. (Tracey Helenius). "Recycling production designs : the value of coordination and flexibility in aluminum recycling operations". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79556.
Testo completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 212-219).
The growing motivation for aluminum recycling has prompted interest in recycling alternative and more challenging secondary materials. The nature of these alternative secondary materials necessitates the development of an intermediate recycling facility that can reprocess the secondary materials into a liquid product. Two downstream aluminum remelters will incorporate the liquid products into their aluminum alloy production schedules. Energy and environmental benefits result from delivering the products as liquid but coordination challenges persist because of the energy cost to maintain the liquid. Further coordination challenges result from the necessity to establish a long term recycling production plan in the presence of long term downstream aluminum remelter production uncertainty and inherent variation in the daily order schedule of the downstream aluminum remelters. In this context a fundamental question arises, considering the metallurgical complexities of dross reprocessing, what is the value of operating a coordinated set of by-product reprocessing plants and remelting cast houses? A methodology is presented to calculate the optimal recycling center production parameters including 1) the number of recycled products, 2) the volume of recycled products, 3) allocation of recycled materials across recycled products, 4) allocation of recycled products across finished alloys, 4) the level of flexibility for the recycling center to operate. The methods implemented include, 1) an optimization model to describe the long term operations of the recycling center, 2) an uncertainty simulation tool, 3) a simulation optimization method, 4) a dynamic simulation tool with four embedded daily production optimization models of varying degrees of flexibility. This methodology is used to quantify the performance of several recycling center production designs of varying levels of coordination and flexibility. This analysis allowed the identification of the optimal recycling center production design based on maximizing liquid recycled product incorporation and minimizing cast sows. The long term production optimization model was used to evaluate the theoretical viability of the proposed two stage scrap and aluminum dross reprocessing operation including the impact of reducing coordination on model performance. Reducing the coordination between the recycling center and downstream remelters by reducing the number of recycled products from ten to five resulted in only 1.3% less secondary material incorporated into downstream production. The dynamic simulation tool was used to evaluate the performance of the calculated recycling center production plan when resolved on a daily timeframe for varying levels of operational flexibility. The dynamic simulation revealed the optimal performance corresponded to the fixed recipe with flexible production daily optimization model formulation. Calculating recycled product characteristics using the proposed simulation optimization method increased profitability in cases of uncertain downstream remelter production and expensive aluminum dross and post-consumed secondary materials.
by Tracey H. Brommer.
Ph.D.
Elo, Kristofer. "Automation in the Recycling Industry : Recycling of Plastic and Large Liquid Crystal Displays". Licentiate thesis, Linköpings universitet, Industriell Produktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90503.
Testo completoTall, Stefan. "Recycling of mixed plastic waste". Doctoral thesis, KTH, Polymer Technology, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2928.
Testo completoRorbach, Joanna. "Ribosome recycling in human mitochondria". Thesis, University of Newcastle upon Tyne, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489319.
Testo completoKronstrand, Therese. "Vinster med återvinning, Stena Recycling". Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-29085.
Testo completoXie, Yiran. "Recycling of foundry waste materials". Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6737/.
Testo completoKrishnamoorthi, Ramesh, e Zhang Shinzhao. "Recycling of Glass Fiber Composites". Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16494.
Testo completoProgram: MSc in Resource Recovery - Sustainable Engineering
Heegn, Hanspeter. "Aufbereitung und Recycling in Freiberg". Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-210733.
Testo completoДядечко, Алла Миколаївна, Алла Николаевна Дядечко, Alla Mykolaivna Diadechko e A. O. Dmitrenko. "Intensive recycling and eco-efficiency". Thesis, Видавництво СумДУ, 2008. http://essuir.sumdu.edu.ua/handle/123456789/16078.
Testo completoMatveyeva, O. "Recycling process in Ukrainian enterprises". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/31661.
Testo completoRamadhani, R. K. "Plastic recycling technology in Tanzania". Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/36270.
Testo completoAl-Rababa'a, Ahmad. "Arithmetic bit recycling data compression". Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26759.
Testo completoLa compression des données est la technique informatique qui vise à réduire la taille de l'information pour minimiser l'espace de stockage nécessaire et accélérer la transmission des données dans les réseaux à bande passante limitée. Plusieurs techniques de compression telles que LZ77 et ses variantes souffrent d'un problème que nous appelons la redondance causée par la multiplicité d'encodages. La multiplicité d'encodages (ME) signifie que les données sources peuvent être encodées de différentes manières. Dans son cas le plus simple, ME se produit lorsqu'une technique de compression a la possibilité, au cours du processus d'encodage, de coder un symbole de différentes manières. La technique de compression par recyclage de bits a été introduite par D. Dubé et V. Beaudoin pour minimiser la redondance causée par ME. Des variantes de recyclage de bits ont été appliquées à LZ77 et les résultats expérimentaux obtenus conduisent à une meilleure compression (une réduction d'environ 9% de la taille des fichiers qui ont été compressés par Gzip en exploitant ME). Dubé et Beaudoin ont souligné que leur technique pourrait ne pas minimiser parfaitement la redondance causée par ME, car elle est construite sur la base du codage de Huffman qui n'a pas la capacité de traiter des mots de code (codewords) de longueurs fractionnaires, c'est-à-dire qu'elle permet de générer des mots de code de longueurs intégrales. En outre, le recyclage de bits s'appuie sur le codage de Huffman (HuBR) qui impose des contraintes supplémentaires pour éviter certaines situations qui diminuent sa performance. Contrairement aux codes de Huffman, le codage arithmétique (AC) peut manipuler des mots de code de longueurs fractionnaires. De plus, durant ces dernières décennies, les codes arithmétiques ont attiré plusieurs chercheurs vu qu'ils sont plus puissants et plus souples que les codes de Huffman. Par conséquent, ce travail vise à adapter le recyclage des bits pour les codes arithmétiques afin d'améliorer l'efficacité du codage et sa flexibilité. Nous avons abordé ce problème à travers nos quatre contributions (publiées). Ces contributions sont présentées dans cette thèse et peuvent être résumées comme suit. Premièrement, nous proposons une nouvelle technique utilisée pour adapter le recyclage de bits qui s'appuie sur les codes de Huffman (HuBR) au codage arithmétique. Cette technique est nommée recyclage de bits basé sur les codes arithmétiques (ACBR). Elle décrit le cadriciel et les principes de l'adaptation du HuBR à l'ACBR. Nous présentons aussi l'analyse théorique nécessaire pour estimer la redondance qui peut être réduite à l'aide de HuBR et ACBR pour les applications qui souffrent de ME. Cette analyse démontre que ACBR réalise un recyclage parfait dans tous les cas, tandis que HuBR ne réalise de telles performances que dans des cas très spécifiques. Deuxièmement, le problème de la technique ACBR précitée, c'est qu'elle requiert des calculs à précision arbitraire. Cela nécessite des ressources illimitées (ou infinies). Afin de bénéficier de cette dernière, nous proposons une nouvelle version à précision finie. Ladite technique devienne ainsi efficace et applicable sur les ordinateurs avec les registres classiques de taille fixe et peut être facilement interfacée avec les applications qui souffrent de ME. Troisièmement, nous proposons l'utilisation de HuBR et ACBR comme un moyen pour réduire la redondance afin d'obtenir un code binaire variable à fixe. Nous avons prouvé théoriquement et expérimentalement que les deux techniques permettent d'obtenir une amélioration significative (moins de redondance). À cet égard, ACBR surpasse HuBR et fournit une classe plus étendue des sources binaires qui pouvant bénéficier d'un dictionnaire pluriellement analysable. En outre, nous montrons qu'ACBR est plus souple que HuBR dans la pratique. Quatrièmement, nous utilisons HuBR pour réduire la redondance des codes équilibrés générés par l'algorithme de Knuth. Afin de comparer les performances de HuBR et ACBR, les résultats théoriques correspondants de HuBR et d'ACBR sont présentés. Les résultats montrent que les deux techniques réalisent presque la même réduction de redondance sur les codes équilibrés générés par l'algorithme de Knuth.
Data compression aims to reduce the size of data so that it requires less storage space and less communication channels bandwidth. Many compression techniques (such as LZ77 and its variants) suffer from a problem that we call the redundancy caused by the multiplicity of encodings. The Multiplicity of Encodings (ME) means that the source data may be encoded in more than one way. In its simplest case, it occurs when a compression technique with ME has the opportunity at certain steps, during the encoding process, to encode the same symbol in different ways. The Bit Recycling compression technique has been introduced by D. Dubé and V. Beaudoin to minimize the redundancy caused by ME. Variants of bit recycling have been applied on LZ77 and the experimental results showed that bit recycling achieved better compression (a reduction of about 9% in the size of files that have been compressed by Gzip) by exploiting ME. Dubé and Beaudoin have pointed out that their technique could not minimize the redundancy caused by ME perfectly since it is built on Huffman coding, which does not have the ability to deal with codewords of fractional lengths; i.e. it is constrained to generating codewords of integral lengths. Moreover, Huffman-based Bit Recycling (HuBR) has imposed an additional burden to avoid some situations that affect its performance negatively. Unlike Huffman coding, Arithmetic Coding (AC) can manipulate codewords of fractional lengths. Furthermore, it has attracted researchers in the last few decades since it is more powerful and flexible than Huffman coding. Accordingly, this work aims to address the problem of adapting bit recycling to arithmetic coding in order to improve the code effciency and the flexibility of HuBR. We addressed this problem through our four (published) contributions. These contributions are presented in this thesis and can be summarized as follows. Firstly, we propose a new scheme for adapting HuBR to AC. The proposed scheme, named Arithmetic-Coding-based Bit Recycling (ACBR), describes the framework and the principle of adapting HuBR to AC. We also present the necessary theoretical analysis that is required to estimate the average amount of redundancy that can be removed by HuBR and ACBR in the applications that suffer from ME, which shows that ACBR achieves perfect recycling in all cases whereas HuBR achieves perfect recycling only in very specific cases. Secondly, the problem of the aforementioned ACBR scheme is that it uses arbitrary-precision calculations, which requires unbounded (or infinite) resources. Hence, in order to benefit from ACBR in practice, we propose a new finite-precision version of the ACBR scheme, which makes it efficiently applicable on computers with conventional fixed-sized registers and can be easily interfaced with the applications that suffer from ME. Thirdly, we propose the use of both techniques (HuBR and ACBR) as the means to reduce the redundancy in plurally parsable dictionaries that are used to obtain a binary variable-to-fixed length code. We theoretically and experimentally show that both techniques achieve a significant improvement (less redundancy) in this respect, but ACBR outperforms HuBR and provides a wider class of binary sources that may benefit from a plurally parsable dictionary. Moreover, we show that ACBR is more flexible than HuBR in practice. Fourthly, we use HuBR to reduce the redundancy of the balanced codes generated by Knuth's algorithm. In order to compare the performance of HuBR and ACBR, the corresponding theoretical results and analysis of HuBR and ACBR are presented. The results show that both techniques achieved almost the same significant reduction in the redundancy of the balanced codes generated by Knuth's algorithm.
Ahuja, Kapil. "Recycling Krylov Subspaces and Preconditioners". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/29539.
Testo completoPh. D.
KATTA, KRANTHI KUMAR, e Ifeanyi William Okogwu. "REFRIGERATOR COMPRESSOR TREATMENT AND RECYCLING". Thesis, Högskolan i Halmstad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-43388.
Testo completohttp://www.diva-portal.se/smash/get/diva2:1326957/FULLTEXT02.pdf
Dardis, Joseph M. "Recycling Concrete for Sustainable Construction". Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1364039160.
Testo completoBoillat, Pauline. "Energy efficient fibre composites recycling". Thesis, KTH, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298422.
Testo completoI detta projekt kommer en undersökning att göras om hur man effektivt kan återvinna fiberförstärkta termoplaster. Först genomfördes en litteraturstudie om de potentiella teknikerna för att förbättra kompositernas uppvärmningseffektivitet. Uppvärmningstekniker, fibrer och möjliga fyllmedel undersöktes. Därefter genomfördes experiment med tillgängligt material. I laboratoriet hade tidigare ett arbete genomförts för att mäta värmeledningsförmågan hos polyamid 12 förstärkt med glasfibrer. Ledningsförmågan hos polyamid 12 förstärkt med kolfibrer kommer här att mätas med samma experimentella metod för att jämföra värmeledningsförmågan. I teorin har kolfibrer bättre värmeledningsförmåga än glasfibrer, detta bekräftades av de utförda experimenten. Under återvinning av kompositer av termoplastfibrer maldes restmaterialet ner. Därför mättes värmeledningsförmågan hos små bitar av kolfiberkompositer, värmeledningsförmågan minskades på grund av ökningen av luftfraktion och förkortningen av fibrerna. Värmeledningsförmågan hos små bitar av glasfiberkomposit undersöktes i det föregående arbetet, genom att blanda de slipade bitarna av kolfiberkomposit och de små bitarna av glasfiberkompositet undersöktes effekten på värmekonduktiviteten. Det noterades att användning av mindre bitar av slipat material gör det möjligt att minska luftfraktionen mellan de större bitarna och öka värmeledningsförmågan.
Al-rifai, Jawad Hilmi. "Performance of water recycling technologies". Access electronically, 2008. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080918.125513/index.html.
Testo completoRock, Channah, Jean E. McLain e Daniel Gerrity. "Common Terminology of Water Recycling". College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2012. http://hdl.handle.net/10150/225868.
Testo completoDe, Venny Alan S. "Recycling of demolished masonry rubble". Thesis, Edinburgh Napier University, 1999. http://researchrepository.napier.ac.uk/Output/6043.
Testo completoLopeman, Brooke Ann. "CAMPUS RECYCLING - INFLUENCES AND DECISIONS". OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1394.
Testo completoLovda, Kathryn Lynn. "THE OHIO BAR AND RESTAURANT RECYCLING TOOLKIT: A RESOURCE DESIGNED TO ASSIST BARS AND RESTAURANTS IN IMPLEMENTING AN EFFECTIVE RECYCLING PROGRAM TO HELP MEET OHIO’S DEMANDS FOR RECYCLED GLASS". Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1416995518.
Testo completoAbu, Zeid Houda, e Tanya Syed. "Suitable textile recycling methods for implementation inSweden : A study in mechanical and chemical recycling methods". Thesis, KTH, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226867.
Testo completoThis report strives to examine the economical, technical and environmental aspects of textileproduction, but mainly textile recycling. Comparisons between natural fibers and syntheticones will be made, comparing both positive and negative aspects. The textile fibers that willbe discussed are cotton, viscose, polyester and lyocell. Furthermore, an analysis of varioustextile recycling technologies currently available and how suited they are for today’s societywill be made. By doing so one can explore the future possibilities and limitations for thedevelopment of textile recycling. A SWOT-analysis will be conducted in order to examinethe possibility to implement one of the recycling techniques in Sweden. The conclusion thatformed from the SWOT-analysis was that the chemical recycling technique is better fitted fora country of Sweden’s nature. Furthermore, in order for Sweden to be able to implement alarge scale recycling system there is a need for development of certain areas, such as sortingtechnologies, collection and general managing of recycled textile fibers. Some furtherconclusions from this study are that:● Greater focus is needed in order to increase the collection of textiles, since thechemical recycling method is the most efficient when it comes to the recycling oflarger volumes of textiles.● The majority of the sorting of textiles should be done automatically to facilitate thehandling of the collection of textiles.● In the beginning one should focus on recycling textiles that only consist of one type offiber, this since the recycling of textiles consisting of more than one type of fiber ismore complex and the technique for it is not yet fully developed.There are two parts to the report. The first part contains an introduction and a description ofthe project’s research questions and mission. The second part is a literature study whichcontains information about different types of textile fibers currently available and how theproduction and recycling of these fibers affect the environment and society as a whole. Theliterature study is followed by a description of the model used in this report and also ananalysis of the final results. An interview conducted with the sportswear company HoudiniSportswear AB can also be found in the literature study.
Cheng, Ka-man Gavin, e 鄭嘉民. "WEEE recycling in Hong Kong : a study of household attitude and behavior towards WEEE recycling". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/194561.
Testo completopublished_or_final_version
Environmental Management
Master
Master of Science in Environmental Management
Mick, Tracy A. "Recycling baler material properties for safer baler operation". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4150.
Testo completoTitle from document title page. Document formatted into pages; contains vii, 74 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 62).
Šijaković, Milan. "Recycling industrial architecture : the redefinition of the recycling principles in the context of sustainable architectural design". Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/318165.
Testo completoEl objetivo de esta tesis es la explicación del concepto de reciclaje arquitectónico como una alternativa ambientalmente sostenible a la demolición o para la preservación. En concreto, la investigación se refiere a la redefinición del diseño del reciclaje en el marco del diseño arquitectónico sostenible. La idea general del desarrollo sostenible se impone a todas las preguntas relacionadas con la construcción durante las últimas décadas. Teniendo en cuenta que sólo un pequeño porcentaje de los edificios existentes esta realizado de obra nueva, es evidente que no es suficiente desarrollar estrategias y conceptos de diseño sostenible sólo para los proyectos nuevos, sino también para los preexistentes. La arquitectura industrial con grandes espacios flexibles y con un gran potencial de adaptación, es la tipología más adecuada para la investigación del reciclaje arquitectónico. El estudio se enfoca en la exploración y redefinición del diseño del reciclaje, concretamente, en la creación de un modelo de reciclaje. Este se compone de tres principios redefinidos del diseño, que surgen de la comparación entre los campos de la biología y la arquitectura. La analogía se llevó a cabo de manera sistemática, aplicando el conjunto de criterios que se refieren a la estructura, los materiales, la forma y la organización espacial, es decir, su relación entre el edificio existente y la nueva intervención. La hipótesis general de la investigación se refiere a las ventajas del reciclaje arquitectónico sobre demolición o preservación, desde la perspectiva de los métodos más aplicados en las intervenciones de edificios existentes. Ésta se basa en la idea, que los procesos de demolición y sustitución simplemente contribuyen al interminable circulo de la producción, el consumo y los residuos. El sector de la construcción constituye uno de los mayores flujos de residuos producidos en Europa y es sin duda el mayor contaminador. Por otro lado, la preservación impone mantener el 'status quo' e impide el edificio adaptarse a las nuevas condiciones. La revisión sistemática de los conceptos de conservación, restauración, destrucción y el diseño sostenible, está basada en las fuentes de John Ruskin, William Morris, Eugéne Viollet-le-Duc y Rem Koolhaas, respectivamente. El análisis permite aclarar el concepto de reciclaje arquitectónico como la 'conservación a través del cambio', siempre en un contexto del diseño arquitectónico sostenible. La segunda hipótesis consiste en comprobar las analogías biológicas para la definición de los conceptos del diseño del reciclaje. Se supone que el concepto biológico de 'simbiosis' es el más adecuado para la definición del nuevo diseño del reciclaje, es decir, la concreción de las relaciones entre el edificio industrial existente y la nueva intervención. Desde el concepto de simbiosis derivan tres principios de diseño de reciclaje: comensalismo, mutualismo y parasitismo. La última hipótesis se refiere a la relación entre las características físicas de un edificio industrial y el concepto de diseño ambientalmente sostenible para su reciclaje. Cuando el edificio tiene un alto uso intensivo, la intervención de reciclaje tiene un menor impacto ambiental. La elección del principio de diseño más sostenible ambientalmente depende de las condiciones, estructural y material, del edificio industrial existente. El valor de este 'modelo de reciclaje' se ve en su carácter multidisciplinar y su enfoque sistemático al tema del reciclaje de la arquitectura. Los principios incorporados en este modelo se refieren a los aspectos de la estructura, material, forma y organización espacial. El 'modelo de reciclaje' proporciona una nueva comprensión de cómo una amplia gama de características físicas de un edificio preexistente se puede considerar de manera sistemática. La finalidad consiste en orientar la elección del mejor concepto de diseño de reciclaje ambientalmente sostenible.
Kayanda, Athuman. "ANALYSIS OF SUPPLY CHAINS IN THE RECYCLING OF ELECTRONIC WASTE. : Resource efficiency within recycling supply chains". Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217867.
Testo completoKwan, Cheng Lai-man Heidi. "Recycling business in Hong Kong : an economic and environmental perspective /". [Hong Kong : University of Hong Kong], 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13498010.
Testo completoNchabeleng, Ramphagane Frank. "Gold recovery from waste mobile phones PCBs using ammonia thiosulphate leaching and copper cementation process". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2855.
Testo completoThe rate of waste electrical and electronic equipment (WEEE) is growing at an alarming rate, especially in countries where markets are saturated with huge quantities of new electronic goods. Printed circuit boards (PCBs) are a substantial portion of the value contained in waste from WEEE although they are only 6% of the total weight. It is reported that WEEE is currently the fastest growing waste stream in South Africa as the general population’s access to electronic goods in the last decade has increased, especially access to mobile phones. PCBs are found in any piece of electrical or electronic equipment and consist of various metals including precious metals such as gold (Au), silver (Ag) and palladium (Pd). It is reported that gold has the highest economic incentive at 15,200 $ per ton of PCBs. The rapid introduction of new and advanced technology into mobile phones has caused mobile phones to have a relatively short life span, 1 to 2 years to be exact. Mobile phones printed circuit boards (MPPCBs) have more Au content compared to computer circuit boards. They contain 350 g/ton Au whereas computer (PC) PCBs contains 250 g/ton. This research project will recover gold from waste mobile phones PCBs pregnant ammonia thiosulphate leach solution using copper cementation. The cementation process is preferred to all the other technologies of metals extraction from solution due to ultrahigh purity metals that can be obtained and to the less consumption of materials and energy. Electronic parts on the PCBs were manually removed using pliers and screwdrivers. PCBs were then cut to smaller pieces of about 2 x 2 m. The pieces were crushed and milled respectively. Some of the particles were recycled back to the crusher to get finer particles. The particles were separated to particles of sizes between 0 and 1350 μm using a shaker. The comminuted fractions of the PCBs were then used in the leaching step. Batch cementation experiments were performed by bubbling N2 in glass reaction vessel with a working volume of 0.5 L. The reactor was connected to a circulating water bath for temperature control. The recovery percentage of gold at various temperatures, agitation speeds and different amounts of copper powder used, was determined while pH was monitored. The temperature was varied at 30 °C, 40 °C, and 50 °C and the agitation speeds at 300 RPM and 900 RPM. Copper powder was added at 0.5 g/L, 1 g/L, and 1.5 g/L. Gold concentrations were measured by atomic adsorption spectrophotometer (AAS). Scanning electron microscope (SEM) and Energy-dispersive x-ray spectrometry (EDS) analyses of the copper powder after cementation (precipitates) were used to determine the surface morphology and to evaluate the quantitative aspect of the precipitate. It was found that the recovery of gold from ammonia thiosulphate leach solution was greatly affected by agitation speed. At an agitation speed of 900 rpm, 40 °C and 0.5 g of Copper powder, 96% of the gold was recovered from the leach solution. The cementation rate increased as temperature was elevated from 30 to 40 °C, but slightly decreased as the temperature reached 50 °C. The change in experimental conditions affected the gold concentration on the precipitate recovered. This study will provide a possible solution to the WEEE problem and more specifically mobile cell phones, in South Africa.
Hallett, Jason Patrick. "Enhanced recovery of homogeneous catalysts through manipulation of phase behavior". Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/11214.
Testo completoSchaffner, Beatrice. "Solarthermisches recycling von festen schwermetallhaltigen Sonderabfällen /". [S.l.] : [s.n.], 2002. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14745.
Testo completoGrause, Guido. "Chemisches Recycling von Polyethylenterephthalat und Polymethylmethacrylat". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967749123.
Testo completoMasuhr, Lilian. "Recycling – von der Wegwerf- zur Austauschgesellschaft". Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/6058/.
Testo completoAquino, Sergio. "Recycling precious metals from mobile phones". Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/64230.
Testo completoApplied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
Laine, Anu Talvikki. "Technologies for greywater recycling in buildings". Thesis, Cranfield University, 2001. http://dspace.lib.cranfield.ac.uk/handle/1826/1205.
Testo completo