In a sustainable society the use of renewable energy and recycling of materials is of high importance. Wastewater treatment plants use large amounts of energy in the processing of wastewater. This study seeks to evaluate wastewater as an energy resource and to examine treatment plants potential to become sustainable energy producers. The study is based upon the internal processes of Himmerfja?rdsverket.

This project aims to investigate whether algae can be used for biodiesel production in Italy. Algaes are a good option since they are fast growing and do not occupy arable land. The aspects that have been considered are growing, harvesting, which algae strain that is most suitable, extraction of oil, the production of biodiesel and where in Italy this could be possible due to climate. Cost? and energy calculations have been made to investigate if biodiesel produced from algae would be profitable. During the production of biodiesel there are several residues obtained. When the oil has been extracted from the algae, biogas is produced from the residual biomass by anaerobic digestion and then the electricity that can be produced is supplied to the production of biodiesel.

The report examines the factors which may be a contributing cause to the problems that are present when ferritic stainless steel are eddy current tested in a warm condition. The work is carried out at Fagersta Stainless AB in Fagersta which manufactures stainless steel wire. In the rolling mill there is an eddy current equipment for detection of surface defects on the wire. The ferritic stainless steels cause a noise when testing and this noise complicates the detection of defects.Because of this, a study was made of how the noise related to factors such as steel grade, temperature, size and velocity. By observing the signal and with the possibilities to change the equipment settings the capability to let a signal filter reduce the noise level were evaluated.

For over 40 years, there's been a debate in Sweden of whether it's good or bad with maintenance therapy for heroin addicts. This method is far more acknowledged in other parts of Europe and in USA. The aim of this paper was to explore how public actors manifest their thoughts concerning the subject of the substitution program in Sweden. This approach includes the complex of problems that can be found in statements and the discourses that these operators stand for and support. In my analysis the philosophical thread was principally based on Michael Foucault ideas, but also on other theories related to social constructionism.

In Italy in 1528 the famous author Baldassare Castiglione published the book Il Cortegiano. In words Castiglione portraits the ideal courtiers and provides a lot of advice on how to achieve the ultimate courtier manner. For example he introduces and explains the words sprezzatura and grazia. His advice spread from Italy and influenced the courts around Europe. My purpose with this study has been two folded. Firstly, I have analysed Castigliones Il Cortegiano in order to examine his vision of virtues and ideals.

Biogas är en förnyelsebar energikälla som tillverkas genom att organiskt material som matavfall bryts ner av mikroorganismer under anaeroba (syrefria) förhållanden. Regeringen har satt upp mål för en högre matavfallsutsortering vilket leder till ökad mängd tillgängligt substrat till biogasproduktion.Matavfallet som samlas in börjar brytas ner under tiden det transporteras och lagras. Syftet med studien var att undersöka hur länge matavfall lagras, ta fram ett representativt recept på ett genomsnittligt matavfall i Sverige och utvärdera hur mycket metanpotential som försvinner från matavfall med avseende på lagringstid, insamlingssystem (papper- och plastpåse) och lagringstemperatur (22°C och 6°C) genom laboratorieförsök.Den genomsnittliga lagringstiden för matavfall från villor och flerbostadshus i undersökningen var sex dagar. Ett recept för matavfall har tagits fram med hjälp av litteratursökning och modifiering av recept i Avfall Sveriges rapport U2010:10. Laboratorieförsöken visade att skillnaden i metanpotential mellan plast och papper var tydlig vid 22°C, då metanpotentialen sjunker, men obefintlig vid 6°C.För att uppnå maximal metangasproduktion från matavfall under den varma delen av året så är plastpåsar bättre då de har en mer konserverande effekt på matavfallet än papperspåsar.

The aim of this study is to examine metaphors and what may be perceived as motif-circuits in Stig Dagerman?s play Den dödsdömde (The Man Condemned to Death) and the two short stories ?Den dödsdömde? (The Man Condemned to Death) and ?Mannen från Milesia? (The Man from Milesia). My intention is to discuss a single theme and identity-marks that unites all three works, using Paul Ricoeur?s The Rule of Metaphor (La mêtaphore vive) as well as the ?thematic critique? of Jean-Pierre Richard.What is metaphor for Ricoeur is for Richard themes (theme): an organizing principle, a sort of schedule around which a world is constituted. Hence, I find similarities between the motif-circuits, Ricoeur?s metaphor-theory and Richards?s themes.

Chlorinated solvents are common contaminants in soil and water. Under anaerobic conditions microbes are capable of transforming chlorinated solvents into ethylene which would result in a remediation of the contaminated area. In order to use natural attenuation as a remediation method evidence of continuous degradation is required. Furthermore, the degradation must occur at a sufficient rate and continuous monitoring of the site is needed until the demanded levels are achieved. A field study was performed on the basis of data from a dry-cleaning facility contaminated mainly by perchloroethylene.

The aim of this study is to examine metaphors and what may be perceived as motif-circuits in Stig Dagerman?s play Den dödsdömde (The Man Condemned to Death) and the two short stories ?Den dödsdömde? (The Man Condemned to Death) and ?Mannen från Milesia? (The Man from Milesia). My intention is to discuss a single theme and identity-marks that unites all three works, using Paul Ricoeur?s The Rule of Metaphor (La mêtaphore vive) as well as the ?thematic critique? of Jean-Pierre Richard.What is metaphor for Ricoeur is for Richard themes (theme): an organizing principle, a sort of schedule around which a world is constituted. Hence, I find similarities between the motif-circuits, Ricoeur?s metaphor-theory and Richards?s themes.

Avloppsreningsverket Sundet i Växjö har en rötningsanläggning som producerar biogas. Anläggningen består idag av två rötkammare och en maskin för avvattning som substratet går igenom efter rötningen. Substratet som används i rötningsprocessen är avloppsslam från Växjö. Planer finns på att utöka processen med en tredje reaktor i vilken det rötade slammet ska återrötas. Detta för att få ut mer biogas ur slammet.

?Life on a delicate thread?Baptism and godparenting in Bottnaryd and Ulricehamn 1781-1783The aim of this study is to discover if there were differences between the baptism traditions maintained in a typical rural parish and in an urban town parish in the period 1781-1783 and to suggest possible reasons for any differences found. Baptism records from rural Bottnaryd parish and the town of Ulricehamn were studied and compared. In both communities, parents were anxious to have their child christened on the day of birth or the day after. They did not want to wait until the following Sunday, as church law prescribed. Infant mortality was high and if the child died before it was christened, it would not go to heaven.

In Italy in 1528 the famous author Baldassare Castiglione published the book Il Cortegiano. In words Castiglione portraits the ideal courtiers and provides a lot of advice on how to achieve the ultimate courtier manner. For example he introduces and explains the words sprezzatura and grazia. His advice spread from Italy and influenced the courts around Europe. My purpose with this study has been two folded. Firstly, I have analysed Castigliones Il Cortegiano in order to examine his vision of virtues and ideals.

Purpose: The objective of this study is to illustrate how participants in leaderless based projects communicate with each other. Several studies have focused on technology-supported projects, such as open source projects, with an established project manager and goal. There is a lack, to the best of our knowledge, in studies that deal with the communication pattern in a leaderless computer supported collaborative project.Method: We have chosen to use a quantitative method where we systematically group several messages according to their content. This method was used in a similar study to illustrate the communication between participants involved in an open source project. We have taken the same Kripendorff based method and adapted it to our study by adding more descriptive variables.Theoretical perspectives: Manuel Castell discusses the aspects of a new communication power that is rooted in the individual as part of a larger creative audience.

En säker bakteriediagnostik kräver en korrekt provtagningsteknik, ett lämpligt transportsätt och rätt odlingsteknik. På grund av centralisering av verksamheter och ekonomiska begräsningar, är transport av prover till mikrobiologilaboratorium mycket vanligt. Detta medför behov av ett transportmedium som håller känsliga bakterier vid liv under långa transport- och förvaringstider. Dessutom skall transportrören klara av maskinell utodling som kräver ett vätskebaserat provtagningsmedium. Denna övergång minskar även arbetsbelastning och förbättra ergonomin hos personalen.

Det är många faktorer som bestämmer val av tak i olika situationer idag. Den största frågan som uppstår handlar oftast om kostnaden. I intervjuer och studier har en sammanställning gjorts som beskriver alternativen grönt tak eller traditionella svarta tak på det nya badhuset i Umeå ur de tre hållbarhetsdimensionerna.Det extensiva gröna taket visar sig vara mer bullerdämpande, förbättrar luftkvaliteten i tätbefolkade och trånga städer. Det gröna taket har även en förmåga att ta upp ca 50 % av den årliga nederbörden. Något som gör det gröna taket mer hållbart ur ett miljömässigt perspektiv.