This thesis was performed as assignment from Fazer Food Services. The aim was to survey which food additives that were present in the products in the quotation list of one of their suppliers to the Education and Nursing segment. The aim also was to perform a theoretical analysis of these food additives and to make recommendations which food additives are acceptable and which should be excluded from the products in the future. The recommendations are not published in this report, for more information Fazer Food Services can be contacted. Food additives which have already been approved are regarded as safe according to the safety evaluation methods available at the time of approval.

The goal of this master thesis project was to develop computer models of some plausiblepretreatment techniques and to assess the potential benefits/costs of using pretreatment andanaerobic digestion for waste management of organic waste from a system perspective. Forthis purpose a computer program called ORWARE has been used. ORWARE (organic wasteresearch) is a program for making life cycle assessments of waste management. As the mainpart of the project work the ORWARE system has been provided with three new models ofpretreatment techniques. The additions consist of: One model of pretreatment with ultrasound,one model of thermal hydrolysis and one model of a screw press.

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.

Mitt projekt Wo lai zi ruidian (Svennebanan i Taiwan) handlar om att göra en kollektion mönster som beskriver min fem månader långa vistelse i Taiwan. Mönstren ska ge känslan av ett annat land där målet är att människor i Sverige ska kunna föra in element av, eller känslan av Taiwan i sitt hem. Mönstren appliceras på produkter som för tanken till ett vardagsliv i Taiwan; digitaltryckts bomullsvara uppsytt till sittpuffar och stickade filtar. Kollektionen består av sju olika mönster som tillsammans beskriver min upplevelse, energin och kaoset från vardagen i ett annat land. My project Wo lai zi ruidian (Svennebanan in Taiwan) is a collection of patterns that tell a story about the five months I spent living in Taiwan.

This thesis has been made on behalf of SCA Skog AB to assess the need of boron in Swedishforest fertilization. Boron has been added to Swedish forest fertilizers since the beginning of the1980s. This makes the fertilizers more expensive and therefore has the necessity of boron inSwedish forest fertilization been raised.The Swedish bedrock generally contains small amounts of boron. The boron in the bedrock istightly bound to the mineral tourmaline and mostly unavailable for plants. This leads to that thecontribution of boron to the soil from weathering is very low besides soils with marinesediments.

This thesis was performed as assignment from Fazer Food Services. The aim was to survey which food additives that were present in the products in the quotation list of one of their suppliers to the Education and Nursing segment. The aim also was to perform a theoretical analysis of these food additives and to make recommendations which food additives are acceptable and which should be excluded from the products in the future. The recommendations are not published in this report, for more information Fazer Food Services can be contacted. Food additives which have already been approved are regarded as safe according to the safety evaluation methods available at the time of approval.

In Sweden surgical treatment of vocal fold lesions in children is fairly uncommon. At Falun hospital they have adapted a more generous attitude towards phonosurgery of children?s vocal folds. The purpose of the present study was to evaluate surgical treatment of organic vocal fold lesions in children and to assess the phonosurgical patient utility. The study was carried out at the Ear-, Nose- and Throat clinic, Falun hospital, Sweden.

The increasing threat of climate change has led to a increased need for models to predict future climat. In these models the changes in the soil carbon pools due to changes in microbiel degradation of the organic matter can lead to both positive and negative feedback-effects. There is however a lack of consensues on the temperature respons on degradation soil organic matter. This paper aim to give a better understanding on the factors controlling the temperature respons. The factors studied were the carbon substrate qualitity and the physiological status of the microorganisms.

Idag ökar kraven på att både företag och konsumenter tar ett större ansvar för miljön. Det härgäller i synnerhet för företag som producerar kläder. Miljötrenden har därför medfört att ävenklädgrossisten Wiges AB har valt att satsa på ekologiskt material. Deras stora satsning undervåren 2008 har varit en kollektion i det ekologiska materialet bambu. Senare under höstenkommer de dessutom även att utöka sortimentet med Organic cotton.

An increasing demand for wood products in China has resulted in large areas invested in fast-growing tree plantations of eucalyptus. Eucalyptus plantations are often associated with an intensive management including fertilization. By understanding the effects of fertilization and where in the ecosystem nutrients are accumulated a more sustainable forest management could be achieved. In this study, a nutrient budget including all biomass and soil components was created for Eucalyptus urophylla. The examined nutrients were nitrogen, phosphorus and potassium.

Textilindustrin står inför stora utmaningar när det kommer till forskning, utveckling ochproduktion på ett miljöanpassat och socialt ansvarsfullt sätt. Ökat miljömedvetetande hoskonsumenten har lett till ökat intresse och möjlighet för företaget att arbeta mot ett hållbartföretagande.Examensarbetet är skrivet som en del av kandidatexamen i textilingenjörsprogrammet föruppdragsföretaget BlåKläder AB och utfördes för att även kunna fungera som ett underlag förandra företag i avsikt med att påbörja/utveckla sitt arbete med socialt ansvarstagande.I arbetet presenteras miljöpåverkan av en arbetsbyxa i bomull från råväv till distribuering.Fyra miljöbelastande kategorier har tagits med i undersökningen, där mängden av kemikalie,vatten- och energiåtgång samt koldioxidutsläpp räknades ut per arbetsbyxa av minimumorder. Sammanställning av resultat visar att det används 2,5 kg kemikalier, 10,3 liter vatten,756 Wh energi och det släpps ut 0,4 kg kodoxid vid tillverkning av en arbetsbyxa.Rapporten behandlar och beskriver produktion av en rå bomullsväv medflamskyddsbehandling. Processflödet för hela behandlingsförloppet analyseras i arbetet därbåde kemikalier, energi- och vattenåtgång tas upp vid varje delprocess. Koldioxidutsläppanalyseras som en särskild del av rapporten och omfattar de direkta utsläppen av tung lastbiloch fraktfärja.

In the collections of the Vasa Museum, 100 leather objects have exhibited salt precipitations. The objects, that have previously been impregnated with PEG, have become deteriorated and fragmented due to the precipitations. During a previously conducted study it was established that the precipitations consisted of iron and sulphur. However, it was not established whether they occurred in the leather?s inner structure and no treatment plan was developed.

Biogas mainly consists of methane and carbon dioxide, where methane is theenergy-rich gas, and is naturally created when organic matter breaks down in absenceof oxygen, also known as anaerobic digestion. A biogas plant re-creates the anaerobicconditions inside a digester where the organic substrate is fed into and digests toproduce biogas. The gas is then used to produce energy by combustion and can beseen as a completely renewable fuel.Today, energy from biogas is used primarily by major stakeholders such asmunicipalities and thus the plants become very large with high investment- andconstruction costs. There are currently few small plants in Sweden, even though thepotential for agriculture and medium-sized to smaller farms to become self-sufficientin terms of electricity and heat is great. Farms have a natural stock of digestibleorganic material in form of manure or crops for example, which are constantlyavailable.

Hallsta paper mill uses large amounts of water during the pulp and paper making processes. The wastewater is treated in two separate activated sludge processes referred to as BIO 1 and BIO 2. The main aim is to reduce the organic substance content, measured as COD (Chemical Oxygen Demand) before the wastewater is released into the environment. Since the effluent produced is very rich in organic substances, the addition of nitrogen (N) and phosphorus (P) are necessary to give satisfactory treatment results. Problems with sludge bulking sometimes occur which lead to increased levels of suspended matter and nutrients in the effluent.

Acid sulphate soils is a wide spread problem along the northern coast of Sweden. This is causing great damage through low pH and leaching of metals out into the streams. These soils are estimated to be found in several places in Sweden but also in many other areas in the world. One of these areas in Sweden that are believed to contain these sediments is Mälardalen. The purpose of this study is to evaluate the extension of the acid sulphate soils in this area.