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7368 Uppsatser om Water and Sewage pipe design - Sida 21 av 492

Skydd mot nitrat och bekämpningsmedel i dricksvatten : åtgärder och styrmedel i fem länder

In many European countries there is an increasing concern about the occasionally high concentrations of nitrate and pesticides in drinking water. The advent of the EU Water Framework Directive particularly highlights this. The directive states that all large drinking water sources should be identified and protected from pollution before 2009 and that by 2015 all water bodies should reach a 'good status'. In Sweden about 60 percent of the drinking water sources have protection areas. This means that about 700 new water protection areas need to be designated before 2009. This will affect many farmers, restricting their farming practices. The purpose of this study was to investigate which methods are used in other countries concerning nitrate and pesticide pollution from agriculture. From this, the expectation was to generate ideas on what could be undertaken in Sweden when designating new protection areas.

Anaerob psykrofil behandling av hushållsavloppsvatten i UASB : Utvärdering av kapaciteten hos en två-stegs UASB-reaktor för behandling av hushållsavloppsvatten

Hammarby Sjöstad is a new district in southern Stockholm. A main objective with the Sjöstad project was to halve the environmental impact compared to other construction work. The environmental goals involve a halved water consumption rate, a local treatment of storm water and trials aiming to extract nutrients from the waste water. Sjöstadsverket is an experimental treatment plant used for testing new treatment processes for domestic waste water from Hammarby Sjöstad. The results are to be compared with the conventional process used at Henrikdals treatment plant today.

Utredning av undervattensbastu

Nordic Marine Sauna AB has, since 2005, designed, manufactured and sold floating saunas. Theproduct are characterised by a well thought thru and appealing design and its high quality. Thecompany is now intending to open a new business area by starting a subsidiary, NordicSubmarine Sauna AB, which will design submerged saunas. The expected customers are leisureand conference centres as well as customers that seek an experience out of the ordinary.Due to the products technical complexity a master thesis was adverted. The task was to do aninvestigation whether such a product is technically viable.The job involved research of existing products and constructions material as well as designingthe product with CAD and FEM-programs.

Ut ur Östersjön genom vassen : beskrivning av övergödningsproblematiken samt optimering av en reningsmetod genom skörd av vattenväxter

This study is based on AgroSeas business idea from environmental problems to valuable resource, with the objective to optimize a method to purify the already eutrophicated Baltic Sea by harvesting water plants, mainly reed. The nutrients will then be recirculated to arable land through residues from biogas production. The amount of nutrients that can be removed by harvesting the biomass depends on the amounts of biomass and the nutrient content of it, which in turn is strongly dependent on the nutrient concentration of the surrounding water. Vegetation suggested in the study for an effective nutrient uptake is helophytes: reed, cattails, reed canary grass, reed sweet grass in shallower water and lemnoideaes: duckweed and nymphaeids in the deeper parts. Competitive species has high purification ability but requires regular maintenance to avoid channeling and overgrowth. Regarding time and method of harvest, effectiveness may be improved by: harvesting plants above the water level and after flowering, a border is kept, harvesting twice a season, a bigger machine and a regular maintenance. This literature has illuminated a major environmental problem and it has been suggested optimizations for a method for cleaning the Baltic Sea through harvesting water plants, but to get a definite answer for the optimal method for each site tests should be carried out, this because many factors determine to what is suitable for each, specific environment. .

Utvärdering av ett värmepumpsystems prestanda till en HWC-tvättmaskin : Med fokus på fläktvarvtal och köldmedieflöde

This report was performed in order to evaluate a new technological measure and focuses generally on a heat pump system to a HWC-washing machine. The client is Asko Appliances AB, a company well known for its environmentally friendly products. The goal of this study was to improve the energy efficiency of a washing machine by combining a heat pump device to the heater of the wash water, in order to reduce the energy consumed for heating the water. Besides reducing the energy consumption in heating the water, the washing machine was required to meet low noise and short operating time specifications. For that purpose, nine trials in three test series have been carried out.

Inventering och karakterisering av brännbart avfall i
Norrköpingsregionen

The purpose of this study has been to make an inventory of combustible waste in the region around Norrköping and to investigate the composition of domestic waste, industrial waste and two different types of sludge. The work was performed at the request of Norrköping Miljö & Energi, due to the planning of an incineration plant. The inventory of the waste was performed through inspection of environmental impact reports, from waste disposal plants in a number of local government areas in the region. The quantities were also compared to another inventory, carried out in a different way. The characterisation of the wastes was compared to the fuel specification determined by Norrköping Miljö & Energi.

Stortorget i Lund : en kandidatuppsats om torgets utveckling från 1000-talet till 2007...

Abstract Squares, these public rooms have always fascinated me. I find them interesting because of their variety in shapes, functions, design etc. Stortorget in Lund is one of Sweden?s oldest squares, this essay is dedicated to this particular square. Of all the possible ways that you could approach Stortorget in Lund I have decided to do it from an urban design point of view.

Implementeringen av EU:s ramdirektivför vatten i kommunernas planarbete : En studie av kommunerna i Stockholms län

The European Water Framework Directive (WFD; 2000/60/EC) was incorporated into the Swedish legislation in 2004 through the ordinance Förordningen om förvaltningenav kvaliteten på vattenmiljön (SFS 2004:660). The objective is that all water bodies shall reach a good status by the year 2015. In Sweden the comprehensive plans of the municipalities can play a large role in reaching these goals. A comprehensive plan deals with the long term water and land use of the municipality, which can facilitate an early consideration of water management in the planning process of the municipality. In Sweden five river basin districts have been established in accordance with the Water Framework Directive.

DET HÄR ÄR OCKSÅ GRAFISK DESIGN - Ett bidrag till diskussionen om ornamentik, funktionalism och kvinnors marginalisering.

This thesis examines the relationship between the marginalization of ornamentation during functionalist modernism and the effect it had on female graphic design practice. By examining the historiography from a gender and feminist theory of history I present a different way of interpreting, not only the history of graphic design but also the concept of graphic design. This thesis does not reach a conclusive result, instead it sets the foundation for further research and illustrates the opportunities that we as graphic designers have to benefit contemporary graphic design by critically reviewing and redefining our history through a diverse historiography..

Redesign av facktidskriften Ingenjören

This degree project contains a theoretical and a practical part about magazine design. Literature aboutthe subject?s typography and magazine design has been studied and put into practice on the professionaljournal Ingenjören. Besides of that a study about the history of magazine typography for the lastfifty years has been done.Typography and other design factors are important for the magazine to be readable and gives at thesame time the magazine an identity of its own, which has become more and more important throughoutthe last decades.The result of this degree project is a new design for Ingenjören, a design that agrees more with howthe journal want to be considered. A new template, a dummy and a manual have been produced.

Designing the Militarization 2.0 research tool

Research is a time-consuming endeavor which requires appropriate tools to manage often vast amounts of information. Militarization 2.0 is a research project aiming to explore Militarization in social media. The aim of this project is to design a user interface for supporting researchers in projects involving large amounts of data in qualitative studies. The project will follow the design process of the first version of the Militarization 2.0 research database interface. The design process involves user studies, interviews and design and testing of paper and digital prototypes.

Metoder och design av visionärt personbilskoncept

I projektet, som är ett examensarbete från programmet högskoleingenjör i teknisk design vid Luleå tekniska universitet, har ett koncept på en delvis förarlös bil tagits fram. Arbetet har utförts mot instutitionen för arbetsvetenskap och har givit värdefull erfarenheter inför fortsatta studier vid Umeå Institute of Design. Resultatet är en lyxig fyradörrars kupé med tänkt lansering omkring år 2020. Bilen sköter till största delen av tiden körningen på egen hand men tillåter även manuell körning på ett nytt och revolutionerande sätt. Fordonet är även en social mötesplats där passagerarna får uppleva en ny dimension av att resa med bil..

Removal efficiency of perfluoroalkyl substances (PFASs) in drinking water : evaluation of granular activated carbon (GAC) and anion exchange (AE) using column tests, and the effect of dissolved organic carbon

Poly- and perfluoroalkyl substances (PFASs) are a group of environmental contaminants that have gained increasing attention due to their potential to bioaccumulate, environmental persistence and potential toxicity. PFASs have been found in surface water, sediment, air, soil, sludge and ice caps globally, as well as in wildlife and humans. Furthermore, PFASs have also been detected in drinking water, leading to raised concerns for human health, since drinking water is one of the most significant sources of PFASs for the general population. Conventional water treatment techniques have shown to be ineffective removing PFASs, highlighting the importance for further research to develop efficient removal techniques. The aim of this study was to investigate the removal efficiency of PFASs in water using two treatment techniques; granular activated carbon (GAC), type Filtrasorb 400®, and anion exchange (AE), type Purolite A-600. Additionally, the effect of dissolved organic carbon (DOC) on removal efficiency was studied.

Förutsättningarna för ett parallellt generation IV system vid svensk nybyggnation av kärnkraft.

A new build in the Swedish nuclear power system would entail increased re-quirements for the proposed repository, which is adapted after the reactors of today. With a fast reactor, capable of burning nuclear waste, operating in parallel with the light water reactors, the increased requirements on the repository could be reduced.In this thesis, simulations of a light water reactor and a fast reactor have been performed by using the Monte Carlo code Serpent to investigate the changes in the fuel inventory. The light water reactor in the study is a boiling water reactor and the fast reactor of the type sodium-cooled fast reactor and they have been used for three different operation scenarios.By studying the fuel composition and the results from the simulations of the three scenarios conclusions can be drawn. Conclusions regarding the change of the fuel inventory and decay heat in Clab as well as the interim storage facility and in the repository. Depending on the operation alternative the changes dif-fered significantly and especially regarding the mass of burned actinides for different fuels in the fast reactor.The lowest increase of fuel assemblies was meet when using 50 years old fuel with 20MWd/kg U burnout and 2,0 % enrichment for start up of the fast reactor and 30 years old fuel assemblies with 50MWd/kg U burnout and 4,7 % enrichment for the further operation of the reactor.The increase of the number of fuel assemblies was 3174, which is equivalent to 641tons of heavy metal.

Responsiv Design ? Möjlighet att implementera utan testning

Responsiv design syftar till att en webbsida ska anpassa sig efter anva?ndarens enhet, oavsett enhetens ska?rmstorlek. Arbetet har ga?tt ut pa? att ta reda pa? om man kan utveckla en framga?ngsrik responsiv design som fungerar pa? ma?nga typer av enheter enbart med en persondator som utvecklingsplattform, och pa? sa? sa?tt undvika att beho?va genomga? en stor process med testning. Resultaten visar att det a?r fullt mo?jligt. .

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