Göteborg Energi has a surplus of district heating during spring, summer and fall. The heat surplus is due to a constant production of waste heat from oil refineries and heat from waste incineration over the year. It would be desirable to increase the demand for heat and the uptime for the newly built combined heat and power generation plant, Rya Kraftvärmeverk. One alternative could be to integrate Rya Kraftvärmeverk with a pellet production facility. By producing heat, electricity and pellet in a joint process the energy use can be decreased.

The aim of this review is to assess the ethical implications of aquaculture, regarding fish welfare and environmental aspects. The aquaculture industry has grown substantially the last decades, both as a result of the over-fishing of wild fish populations, and because of the increasing consumer demand for fish meat. As the industry is growing, a significant amount of research on the subject is being conducted, monitoring the effects of aquaculture on the environment and on animal welfare. The areas of concern when it comes to animal welfare have here been divided into four different stages: breeding period; growth period; capturing and handling; and slaughter. Besides these stages, this report includes a chapter on the current evidence of fish sentience, since this issue is still being debated among biologists.

Vattenfall Heat Uppsala runs the waste incineration plant in Uppsala, which produces district heating, process steam, district cooling and electricity. Vattenfall Heat Uppsala has decided to introduce an energy management system with the aim to increase the energy efficiency of the plant. The basis in such a system is to make an energy mapping.In this thesis an energy mapping has been performed at the waste incineration plant with the aim to identify and determine the size of energy flows. The investigated energy flows are used fuel, produced and used steam, produced district heating and cooling. Also the use of electricity to run the processes has been investigated.

The most common way to treat wastewater in Sweden today is by a combination of an activated sludge process and a chemical treatment. These processes are not very energy efficient and may not be the most environmentally friendly. That is why it is interesting to evaluate new alternative methods to see if they can be less harmful to the environment and help to a lower resource consumption. New techniques are tested in a pilot installation at Hammarby Sjöstad, Sjöstadsverket. To be able to evaluate these techniques in a wide perspective system analyses are conducted where different impacts can be considered, advantages and disadvantages in the systems.Five system structures for water treatment have been constructed in Matlab/Simulink in this study.

The main objective of this study was to evaluate animal welfare situation in Ethiopia during slaughter and to investigate chain activities between animal markets and Kera abattoir in Addis Abeba. In total, 442 animals were observed within 52 groups of cattle; both ox and calves with different breeds. The study was divided into four different sets of data collection; behavioural observations, recording of slaughter process, observation during transport and interview. During the behavioural observations, an ethogram was used with 46 behaviours observed, categorised into 5 different groups. The data was calculated using Excel and SAS. The results indicated that a significant correlation (p-value.

This study deals with one of the most discussed work environmental issues in the modern society of Sweden today - work related stress, its causes and how stress can affect people in their working situation. Our study is based on a questionnaire among aid handling officers in two municipalities of the middle of Sweden, and two interviews with their directors. We found that aid handling officers has a complex occupational role. We also found that the officers in these two municipalities experiences about the same level of stress.Further in the study, we will deal with whatever could be the cause of the stressful situation, using the demand/control model of Karasek and Theorell. The result shows that despite the similarity of the stress experience, the cause was shown to be different.

Today there is a widespread opinion that the woodmarket and the forest industry are dominated by a traditional way of thinking and not adapted to the customers of today; a lot of products are produced purely on routine. Also, there is a demand for improving the quality of sawn woodproducts. AB Karl Hedin wants to sort this out by increasingly adapt their products to the demands of the market, i.e. through introducing a short wallstud of standard length, "Hedinregeln". At tirst, the wallstud will be produced in lengths of 2,70 m and of guaranteed quality.

This study is focused on small scale water and wastewater handling in Sweden. The study is divided into two major parts; the first describes common methods for water- and wastewater handling and the second part is a case study on three small and expensive systems in Gällivare municipality, in the north of Sweden. In the case study, abilitys for the local government to hand over unwanted systems to the water users is investigated and found to be a plausible solution to cut costs for two out of the three studied systems. In the third case, water and wastewater systems is not recommended to be handed over but other ways of cutting costs are suggested..

Syfte: Studiens syfte har varit att utifrån en socialpedagogisk modell bestående av fyra teman; relation, läroprocesser, genus och praktisk handling, undersöka tre verksamheter inom socialt arbete. Vidare handlar det om att försöka förstå och förklara hur de yrkesverksamma handlar och reflekterar i arbetet, utifrån den socialpedagogiska modellen.Metod: Kvalitativ metod har använts vid materialinsamlingen, bearbetningen och analysen av data, genomgående under hela forskningsprocessen. Genom fem halvt strukturerade intervjuer har det empiriska materialet samlats in. Intervjuerna har kompletterats med deltagande observationer av de yrkesverksamma i arbetet.Slutsatser: Studiens slutsatser är att de professionella arbetar utifrån den socialpedagogiska modellen när de; skapar relationer med vardaglig och informell prägel, utformar läroprocesser i syfte att främja social förändring, synliggör genusstrukturer genom reflektion och handling, samt använder aktiviteter och samarbetsövningar i organiseringen av arbetet. Resultatet visar ytterligare hur modellen formas till en socialpedagogisk spiral, utvecklad ur teori och praktik..

As a company it is required to work with strategies to minimize costs such as packaging and logistic costs. The increased market of industrial produced wooden buildings results that the time and the cost which the packaging of prefabricated building elements consume, is experienced to be in greater need of development than before and demands a better solution. The aim with this dissertation was to discover how the development of the handling of the packaging can improve the packaging process. The goal was to present improvement proposals for a simplified and thereby a more efficient production in time and cost perspective.The packaging process which includes packaging, handling, storage and transport were studied. Interviews were made with participants from the market for manufacturers of wooden houses and a case study was made at the company A-hus.

Första januari år 2013 trädde den senaste versionen av MARPOL Annex V i kraft. Denna studie har genom en litteraturstudie samt intervjuer med nautiska befäl sökt svar på vilka förändringar som skedde, hur dem implementerats ombord samt hur förändringarna upplevts av sjöfarare. Syftet med studien var att bidra med en pusselbit till bilden av hur avfallssortering utövas till sjöss samt hur arbetet med det upplevs. Litteraturstudien kom fram till att den stora skillnaden är att papper, glas, metall samt aska inte längre får slängas i havet. Inom specialområde får endast matavfall destruerat genom avfallskvarn slängas överbord.

The aim of the study was to map the extent of Fe, Cu, Pb, As, Zn and S contamination in the area surrounding the Nasa silver mine. The mine operated between 1635 and 1810 with some prospecting performed in 1889, and has become infamous for the gruesome ways that the indigenous people were treated during the early years of operation. This study tested three hypotheses through a geochemical survey: 1) sulfide oxidation is still active in the abandoned mine, 2) the soil downslope of the mine is contaminated by mine drainage, and 3) the stream downslope of the mine is affected in the same way. All three hypotheses were valid, as the results showed that still, >200 years after mining operations ceased, signs of the historical mining are clearly visible in the surrounding environment. Acidic conditions were discovered in surface waters close to the waste rock piles, which indicates active sulfide oxidation.

Treatment wetlands been showed efficient for reducing pollutant in waste water. In Lajeado ? RS, Brazil the landfill has poor leachate water treatment. It is necessary to supplement the treatment plant because they need to reduce BOD, COD and nitrate of the water going to recipient. A subsurface flow wetland (SSF) can be a good choice.  In order to be able to design an efficient SSF it is important to understand how the grain sizes of a substrate affect the reducing of pollutants in waste water.

I denna uppsats presenterar och diskuterar författaren tre invändningar som riktats mot dygdetikern Rosalind Hursthouses förslag om vad som är en moraliskt riktig handling. Hursthouse menar att en handling är moraliskt riktig om den är vad en dygdig agent karaktärsenligt skulle göra i omständigheterna. Den form av invändningar som författaren presenterar och diskuterar i uppsatsen försöker visa på att Hursthouses förslag exkluderar handlingar som vanligen anses är rätt.Författaren argumenterar för att en dygdetik lik den Neo-Aristoteliska dygdetik Hursthouse försvarar kan formuleras så att den undgår invändningar som presenteras i uppsatsen. Författaren föreslår att vi istället för att förstå Hursthouses förslag som om det gällde de faktiska handlingar som en dygdig agent gör, istället bör uppmärksamma att en dygdig agent följer handlingsmaximer vilka hon prövat under sin moraliska utveckling till att bli dygdig. Författaren föreslår vidare att det är huruvida en handling utgår från en maxim som karaktärsenligt kan ingå i ett dygdigt liv som är avgörande om den är moraliskt riktig eller inte..

In today?s fast growing and closely connected society, a reliable and energy efficient transportation system is more than ever desirable. Nowadays the significant part of the transportation sector?s energy demand is supplied by fossil fuels.Improving energy efficiency in combustion engines will result in reduction of fuel consumption and CO2 emissions. A modern internal combustion engine has an efficiency of 30-45 %, where the most energy loss occurs as result of heat losses in the exhaust and cooling systems.