Global warming is a huge issue that humans have contributed to through over-exploitation of natural resources and extensive usage of fossil fuels. Now more than ever, we need to embrace a recycle thinking and reuse our waste, for example through producing biogas from our food waste. The purpose of this report was therefore to identify the energy usage and emissions resulting from the biogas chain which spans from Solna Stad to Uppsala Vatten. Furthermore, potential efficiency improvements were to be identified and proposed. This report focused mainly on the first part of the biogas chain that includes the collection of the food waste and the reloading process.

In this study potential health risks for employees in connection with handling of bottom ash and bottom ash water at a Municipal Waste Incineration (MWI) plant have been investigated. Air surrounding the bottom ash and the bottom ash water has been examined. MWI is one of the primary ways to manage solid household waste, and bottom ash is the main solid residue produced by the incineration process. Bottom ash constitutes about 15-20% of the original waste. The bottom ash is extinguished in a water bath (bottom ash water).The study was carried out in a MWI plant in Karlstad, Sweden.

Syftet med arbetet var att beskriva hur pedagoger resonerar kring inskolning iförskolan samt hur man som pedagog arbetar med anknytning under och efterinskolningen. Jag har gjort en kvalitativ undersökning med semistruktureradeintervjuer där sex förskollärare deltog. Det visade sig att alla respondenternaarbetade med den föräldraaktiva inskolningen i sin verksamhet. Det verkar däremotfinnas ett?problem? med hur de ska arbeta med denna metod.

The purpose with this thesis is to analyse different factors that can explain district heating prices for energy companies in Sweden. We are further interested in examining if the prices is affected by the use of industrial waste heat in their production and the company?s ownership structure. The method applied is a multiple regression analysis using a panel data set of 50 companies over 5 years (2008-2012). The data used is yearly data obtained from the Swedish district heating association.

The purpose of this thesis has been to determine experimentally how good a peltierelement is to convert waste heat from wood burning. Three different peltier elementswere used in a comparison study. The comparison was mainly done to know howmuch power could be obtained from each element. Even, a circuit with a step-upfunction has been created to give a higher output voltage than the peltier elementitself. The result of the experiments was a low output power, the highest valuereached 2.18W.

Each year, the coffee machines at Ericsson in Kista produce around 100 tons of ground coffee waste.The companies Coor Service Management, Löfbergs Lila and Selecta are all responsible for differentstages in the logistical chain in delivering coffee and, together with Ericsson, they want to increasetheir environmental benefit. The plan is to produce biogas through anaerobic digestion instead ofincinerating the coffee waste in a heating plant. The results are to be presented as different businesscases in which different biogas plants are compared with the reference case (heating plant),comparing costs and environmental impacts.There are two major environmental benefits from producing biogas; reduced carbon dioxideemissions from when fossile fule is replaced by carbon neutral biogas, and reduced emissions fromreturning digestate from the bio reactor to farmland instead of using industrial fertelizer.In order to determine the biogas potential in coffee waste, a couple of properties had to bedetermined in a laboratory. Properties such as the dry substance content, heating value, moisturecontent and ash content. The results show that 100 tons coffee waste could produce around 16 500Nm3 biogas which would contain 163 MWh.The biogas reactor and upgrade plant both need energy gas to function and uses around 14 MWh ofthe produced gas.

AbstractThe term aftercare is largelyexplained by means of the contextual and ideological conditions for treatmentwhich are to be found in juvenile care facilities. The development of the livesof young people who have been placed in care facilities is dependent ontherapeutic relationships, professional separations, continuing follow-ups andan even transition from control to autonomy. The aim of this study was toexamine the steering mechanisms behind the execution and planning of aftercareat a youth facility for care or residence. The aim was further defined throughthe specification of the following questions: 1. How are the concepts ofresocialisation and aftercare define and delimit? 2.

Perfluorinated substances (PF) are environmental pollutants that are used to coat fibres of so called ?all weather clothes? to make them water resistant. PF are effectively spread through water. Waste water treatment plants (WWTPs) are a pollutant source of these substances. PF are poisonous to different kinds of organisms, and supposedly also to human beings, if concentrations are sufficiently high.Perfluorinated substances have been investigated at three waste water treatment plants in Stockholm during the 2000?s.

The goal has been to design a product for unloading and storing small gadgetsin the hallway. The aim has been to facilitate the search for importantsmall objects that people never seem to find when they need them the most.The aim has also been to provide a sense of relief when people enter theirhome, and they can empty their pockets on one spot in a very simple yet orderlymanner. The product would be able to sort out, and make the gadgetsaccessible, take as little space as possible, be easy to use and not be perceivedas heavy and clumsy. The work has been done with close involvement of afocus group consisting of 20 people of different ages and with different occupations.The behavior of the focus group has been observed and test modelshave played a crucial role in advancing the work troughout the project. Theresult is a series of storage products for the wall, of simple shapes which canbe combined together in different ways depending on hallway and the user?sindividual taste or preference..

Uppsatsens övergripande syfte är att undersöka om, och i så fall hur, unga vuxnas erfarenheter av separation och vårdnadstvist mellan föräldrarna under barndomen inverkat när det gäller inställning till samlevnadsfrågor. Mer konkret är avsikten att söka svar på frågor som beaktar principen om barnets bästa, attityder gentemot relationer, separationer och giftermål liksom dagens relation till föräldrarna. Tolkningsramen som användes för att tolka och förstå uppsatsens empiriska material baseras på de inledande bestämmelserna enligt 6 kap. föräldrabalken, några risker med socialarbetarens förhållningssätt, barnets känsla av ansvar, lojalitet och hemlighållande, barnets överlevnadsstrategier och kognitiv dissonansteori. Dessa tolkningsredskap var effektiva för att belysa unga vuxnas erfarenheter från barndomen och deras attityder till samlevnadsfrågor.

Pharmaceuticals that are found in marine ecosystems are a threatening environmental concern, which is known to harm both animal and plant life. One of the reasons for this problem is that the waste water treatment techniques are not optimized to clear waste water from its pharmaceuticals contain. In this master thesis four Swedish treatment wetlands were studied, and their ability to reduce numerous pharmaceuticals in waste water. The four treatment wetlands that were studied were those in Oxelösund, Trosa, Nynäshamn and Eskilstuna. Two ecotoxicological tests and chemical analysis were used.

Vattenfall district Heating power plant in Uppsala produces district cooling with absorption heat pumps which leads to a large amount of waste heat that has to be cooled with evaporative cooling towers. The Environmental Court has ordered Vattenfall to survey the possibilities to recover the heat, which is the focus of this thesis.The study begins with an overview of the system, and conditions and limitations for waste heat recovery is examined. In the next step alternatives to recycle the heat is evaluated, either by direct recovering or by upgrading.First, the technical possibility of each alternative is discussed, and then the operation time and the amount of recovered heat is calculated. Those alternatives which are possible are brought further to an economic analysis.The cost of investment for each alternative constitutes the basis for a present value analysis. The results are put together in a table where the total amount of recovered heat is compared with the present value for the different alternatives.

In the last decades, lean production has proven to be one of the most important organizational paradigms in manufacturing. The lean concept has also spread into the service industry where it is applied within a range of different areas. The wide applicability of lean principles has spurred the authors of this study to apply the principles in the context of the operations of a Swedish remand prison. The thesis examines the process a client of the remand prison Häktet Kronoberg goes through from the time of arrest until he/she is released or convicted and transferred to jail. Based on lean tools and principles, the thesis maps and analyses this process.

In the coming years, organic food waste will be collected in the region of Gästrikland, Sweden. The collection is planned to cover the entire region by the end of year 2007. To start with, smaller amounts are being collected and transported to a central composting plant in Sala. However, a central composting plant in the region of Gästrikland is projected.The objective of this thesis is to evaluate a number of possible methods for composting of organic food wastes regarding their environmental impacts and localization.There are four scenarios for future composting of organic waste that have been evaluated. There are two that consist of membrane composting, either in Sala or in the region of Gästrikland.

Eutrophication of the Baltic Sea and Swedish lakes remains a major problem despite many years of effort to reduce the emissions of nutrients. One major source is waste water systems, especially private sewage systems. These sewages accounts for a very large share of nutrients per capita in comparison with citizens connected to larger sewage treatment plants. Norrtälje community has the greatest number of private sewage systems in Sweden. Discharges of nutrients, especially phosphorus, to the Baltic Sea from these sewage systems are significant.