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  • 1.
    Eriksson, Mattias
    et al.
    Swedish Univ Agr Sci, Dept Energy & Technol, Sweden.
    Lindgren, Samuel
    Swedish Univ Agr Sci, Dept Energy & Technol, Sweden.
    Persson Osowski, Christine
    Uppsala universitet, Sweden.
    Mapping of food waste quantification methodologies in the food services of Swedish municipalities2018Ingår i: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 137, s. 191-199Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Since food waste valorisation measures, like energy recovery, have limited possibilities to fully recover the resources invested in food production, there is a need to prevent food waste. Prevention is most important at the end of the value chain, where most sub-processes have already taken place, like in catering facilities. In Sweden, the public catering sector serves a large number of meals through municipal organisations, including schools, preschools and elderly care homes. Many of these organisations quantify food waste, but since Sweden has 290 municipalities with a high degree of independence, the possible variation is significant. This study therefore investigated how food waste is quantified, in order to help formulate a national standard for food waste quantification. Mapping of food waste quantification practices was conducted using a questionnaire and follow-up telephone calls, achieving a response rate of 93%. Of the 290 Swedish municipalities, 55% replied that they quantify food waste on central level. The most common practice at present is to quantify plate- and serving waste from school lunches during two weeks per year, and to compile waste data in spreadsheets and compare the values against the number of plates used, giving a result in grams per portion served. There are many similarities between municipalities, so there is great potential to implement a common standard that many municipalities already fulfil. This is important in order to gain acceptance and fast implementation, thereby speeding up the process of establishing a benchmark for food waste in the Swedish public sector catering sector.

  • 2.
    Ottosson, Elsa
    et al.
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Oweini, Rania
    Mälardalens universitet, Akademin för innovation, design och teknik.
    Developing a closed-loop supply chain to eliminate Single Use Plastic products: Implementing Circular Economy practices driven by EU commission directives2023Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Single use plastic products (SUPs) are a primary cause of plastic pollution causing significant environmental harm. These products have little to no value after use and are challenging to recycle cost efficiently. In a bid to combat this issue and foster circular economy, the European Union has declared a series of directives to gradually phase out SUPs as a strategy to eliminate these disposables from the market. This approach allows the market time to discover alternative solutions to replace SUPs, promoting the adoption of reusable products. To make a sustainable system of reusable products feasible and profitable, the key lies in devising a business model designed for a circular strategy of repeated use of goods. One effective approach involves establishing a closed-loop supply chain (CLSC) which entails the entire life cycle of a product, from sourcing raw materials, through manufacturing, utilisation, collection, reverse logistics and recycling. The purpose of this study was to develop a CLSC system for reusable plastic products between a plastic producing small or medium sized enterprise (SME) and an incumbent firm customer to attain a smooth transition from linear to circular economy. Employing an inductive approach, this case study considered the EU-directives as observational data, the change of business model as the result, and a general recommendation as the rule. The research method encompassed conducted interviews, mathematical prototyping, product design, and life cycle analysis, using various tools and methods in the process. Two case companies were involved: one large incumbent firm and one plastic producing SME. The aim was to design a circular business model (CBM) to capture the value of the collaboration between these two companies. After an analysation of the current situation, the main obstacles to a successful transition were identified. A comprehensive solution was developed, including a network of partners for the CLSC, a reusable product design, and the necessary implementation calculations. The finalised business model was anchored in the principles of the CLSC, the product design specifications and the calculations that determined the system’s viability. Implementation of the CBM would yield economic advantages for both stakeholders, as well as an improved green image factor and advancement in circular economy. Furthermore, this transition would cultivate valuable and lasting business relationships for both companies. These case findings harmonise with established theories which emphasise the significance of business models that are dependent on collaboration and long-term strategic planning. Lastly, they also underscore that value is created in product utilisation and not ownership. 

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  • 3.
    Petrov, Peter
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Energieffektivisering av belysning för växthusodling2021Självständigt arbete på grundnivå (yrkesexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This case study investigates how the biomass changes depending on changes made to the time interval for the lights and the distance between the crops and light. The study is split in three different cases and each case consists of three batches. The different baches have three different heights between the light and the crops and the heights being used is 55, 110 and 165cm. The light interval in the first case was 12 hours, 6 hours for case 2 and 3 hours for the last case. 

    Case 1 had an average biomass weight of 28,5 g, for batches 1-3 and the light interval was twelve hours. In case 1 and 2 the pea plants looked healthy and green but in case 2 the plants were taller, and the leaves had widened more. Case 2 had an average biomass weight of     55,5 g, for batches 4-6 when the interval of the lights was 6 hours. The last case generated the most biomass of all the cases with an average of 102,5 g for batches 7-9, and the plants was completely yellow. Case 2 compared to case 1 gave double biomass yield for the same amount of energy used. One-way Anova determined that it was not any statistically significant difference between the batches but, however, it was for the different cases. 

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