A significant proportion of construction and demolition (C&D) waste is encompassed within the broader category of global waste. The handling of C&D waste is subject to the influence of a tripartite of environmental, social, and economic factors. An extensive comprehension of C&D waste management can be attained by examining the construction industry, waste management, transportation, and non-governmental organisations (NGOs). The escalating aggregate demand and landfill practices significantly threaten developing nations' natural resources, despite the national government's regulatory measures. The present study employed a qualitative research approach and a multi-level perspective (MLP) framework to investigate the various actors, factors, and levels that impact the management of C&D waste. The present analysis relates independently to investigating lock-in determinants, encompassing exogenous and endogenous pressures and socio-technical transitions. Bengaluru's management of C&D waste encompasses a diverse array of stakeholders, including real estate organizations, urban development agencies, construction firms, both formal and informal markets, a solitary C&D processing plant situated at the periphery of the city, unapproved landfills located in abandoned stone quarries, local transportation providers, governance bodies, and low-carbon building methodologies. Furthermore, it is imperative to note that there exist significant deficiencies in the execution of C&D waste management by established protocols, as well as their enforcement. This is compounded by an acute shortage of facilities for the collection and disposal of such waste, insufficient vehicular resources at the disposal of the Bruhat Bengaluru Mahanagara Palike (BBMP), limited participation from stakeholders, negative attitudes towards the effective use of recycled materials and the repurposing of building components, a lack of incentivisation and punitive measures, inadequate awareness among proprietors and constructors of private edifices, and the indiscriminate dumping of C&D waste, which has led to the obstruction of commuting and communal well being. The effects of landfills on wildlife, such as avian migration and urban inundation, have prompted a transition towards more ecologically sound management of C&D waste in Bengaluru. Formulating sustainable strategies for managing C&D waste in Bengaluru is encouraged to incorporate socio-economic and environmental factors, business models, and governmental cooperation. The importance of sharing information, the power of nudging people to alter their habits, and the value of considering new approaches to building are also highlighted.

Swedish power plants have in general an overcapacity which means that they must import waste from abroad. The imported fuel consists of several types of waste, but the majority originates from municipal and commercial waste. EFO is one of the leading fuel supplying and transport companies in Sweden. The company is owned by eight power plants located all around Sweden. The waste is purchased from other countries and then shipped to Sweden. During the unloading of the ship, when the cargo hatches opens, the malodourous gases will escape and be released in to the air. These malodours can travel quite far and are extremely unpleasant to people who live close by. The aim of this thesis was to suggest ways on how to prevent or reduce the emission of malodours during unloading of bales containing municipal waste. The aim of the project was to determine the causes of malodours, to identify the most common odorants in municipal waste, what properties they have, how they can be affected and how to prevent the formation of them. The problem was tackled by theoretical and practical studies. The theoretical study was a literature study and the practical study was observation at Mälarenergi combined heat and power plant. The results are presented as a number of suggestions for how to prevent or reduce the emission of malodours during unloading of bales containing municipal waste. These suggestions were divide in to the three categories Storage, Unloading and At Port. The suggestions varied from using better sorted waste to researching the possibility to use a portable tent covering the cargo ship during unloading. It was recommended that EFO should use both short- and long-term plans and also conduct further research on other ways to reduce emission of malodours.The suggestions were not tested so it cannot with certainty be determined if the suggestions will reduce or prevent emission of malodour. No laboratory tests were done on the waste. Therefore, the contents and concentrations could not be confirmed. However, it is almost certain that even if there were a slight difference it would not lead to a change of the current treatment process of the MSW. Obviously, there should have been multiple observations carried out at Mälarenergi`s power plant on various occasions and at different weather conditions. Several observations should also have been done on EFO´s other power plants to confirm that the core of the malodour emission problem is the same for all power plants. Basing suggestions on results taken from one instance might not give the correct answer to the problem. Common for malodours found in MSW is that they are formed as a product of degrading MSW. Reducing or stopping the degradation process, will prevent the formation of these compounds. This can be done either by lowering the temperature of the waste bales, altering the pH, decreasing the water content and increasing the level of Oxygen. / De svenska kraft- och värmeverken är så effektiva att det svenska bränslet inte räcker till utan man måste importera från andra länder. Bränslet består till stor del av hushållsavfall och kommersiellt avfall. EFO är ett energianskaffnings- och transportföretag som delägs av åtta svenska el- och värmeleverantörer. De förser sina ägare med bränsle till deras kraft- och värmeverk runt om i landet. Majoriteten av det inköpta bränslet kommer från utlandet och fraktas till Sverige med fartyg. Problemet för boende i närområdet är att avfallet avger dålig lukt när det lastas av från fartyg till hamn. Syftet med den här rapporten var att undersöka hur man kan förhindra eller minska utsläpp av dålig lukt vid avlastning från fartyg till hamn samt att ge förslag på metoder som kan minska luktproblematiken. Övriga mål var att fastställa vilka de mest förekommande luktämnena är, orsaken till att de bildas, vilka egenskaper de har och hur man kan förhindra att de bildas. Arbete består av en litteraturstudie tillsammans med observation gjord på Mälarenergis kraftvärmeverk. Resultaten presenterades i form av ett antal förslag på sätt att minska utsläpp av dålig lukt vid avlastning. Dessa förslag indelades i de tre områdena Lagring, Avlastning och Hamn. Förslagen var breda och sträckte sig från användning av bättre sorterat avfall till att utreda om det finns möjligheter till användning av ett portabelt tält kring fartyget under avlastning. Utöver de presenterade förslagen för minskning av luktutsläpp gavs också rekommendationen att EFO bör använda sig av både kortsiktiga och långsiktiga planer samt forska på ytterligare sätt för att minska utsläpp av dålig lukt. Förslagen har inte prövats och det kan därför inte fastställas om de reducerar och förhindrar utsläpp av dålig lukt. Det gjordes heller inte några laboratoriska analyser på avfallets innehåll därför kan det inte bestämmas om avfallet innehåller samma ämnen och koncentrationer. Sannolikt skiljer sig inte värdena så pass mycket att det skulle kräva andra typer av luktreducerande metoder. Fler observationer borde ha gjorts både på Mälarenergis anläggning och på de andra delägarnas anläggningar. Observationerna skulle då också utförts vid olika tidpunkter samt vid olika väderlek. Det är möjligt att resultatet skulle vara annorlunda om det funnits data från fler observationer. Gemensamt för ämnen som avger dålig lukt är att de uppkommer som en produkt av nedbrutet avfall. Genom att bromsa eller stoppa nedbrytningsprocessen kommer uppkomsten av dessa luktämnen förhindras. Detta kan man göra genom att förändra pH, sänka temperaturen, minska fukthalten och öka syrenivån.

Solid Waste Management has become an issue of increasing global concern. As the population continues to grow and consumption patterns change municipal authorities are facing immense challenges to manage the increasing amounts of solid waste in a sustainable way. This report is composed by interviews, observations and literary studies and aims to map the Solid Waste Management system of Inhaca Island in Mozambique, in order to identify challenges and recommend for further actions of improvement. At Inhaca Island, waste is deposited on an open dumpsite or otherwise buried or burned around the house yards. The lack of financial means contributes to an improper waste management on the with challenges in areas such as collecting, disposal and treatment of waste. For Inhaca Island it is important to focus on improvements of the Solid Waste Management system that are not as dependent on the financial means of Maputo municipality, such as improvement in public awareness and informal waste-picking. These factors need to be addressed before establishing a technical system. Inadequate collection and handling of waste exposes the population to hazardous waste and endanger both public health and the environment. Therefore it is important to improve the waste management conditions on the island. / I samband med att populationen ökar världen över och att konsumtionsmönstren förändras har olika kommunala myndigheter svårigheter med att hantera avfallshanteringen på ett hållbart sätt. Syftet med denna rapport är att kartlägga avfallshanteringen på Inhaca Island i Mozambique samt att identifiera olika svårigheter och att rekommendera potentiella framtidslösningar för det aktuella systemet. Datainsamlingen har gjorts genom intervjuer, observationer och litteraturstudier. Avfallet på Inhaca Island transporteras till en öppen dump-plats eller grävs ner eller bränns på befolkningens bakgårdar. Bristen på finansiellt stöd bidrar till en olämplig avfallshantering och därför är det viktigt att Inhaca Island fokuserar på förbättringar som inte är beroende av höga finansiella kostnader såsom information till allmänheten och den informella avfalls-plockningen. Dessa faktorer måste bli täckta innan ett tekniskt system implementeras. Det är viktigt att förbättra avfallshanteringen på ön då en bristande avfallshantering utsätter både människor och miljön för olika risker.

There are several incentives for using bottom ash from municipal solid waste incineration (MSWI bottom ash) as a construction material, such as for road construction. These incentives include decreased disposal of material on landfills and a reduced amount of raw material extracted for road building purposes. However, one of the main obstacles to utilising the material is uncertainties regarding its environmental properties. The overall objective of this thesis is to describe the potential environmental impacts of utilising MSWI bottom ash in constructions and to improve the tools for environmental assessments. An environmental systems analysis (ESA) approach based on a life cycle perspective was outlined and used in a case study, with the aim of describing the differences in resource use and emissions that can be expected if crushed rock in the sub-base of a road in the Stockholm region in Sweden were to be substituted by MSWI bottom ash. The whole life cycle of the road was taken into account and the alternative disposal of the bottom ash was included. It was found that the studied alternatives would cause different types of potential environmental impact; whereas the conventional alternative with only crushed rock in the road’s sub-base would lead to larger use of energy and natural resources, the alternative with MSWI bottom ash in the sub-base would lead to larger contaminant leaching. It was concluded that a life cycle approach is needed in order to include both resource use and emissions in the comparison between the two alternative scenarios. The leaching of metals turned out to be the most important environmental aspect for the comparison and in particular the difference in copper (Cu) leaching was shown to be large. However, a large amount of Cu may not pose an environmental threat if the Cu is strongly bound to dissolved organic carbon (DOC). In order to improve the basis for toxicity estimates and environmental risk assessments, and thereby provide better input values for ESAs, the speciation of Cu to DOC in MSWI bottom ash leachate was studied. It was found that Cu to a large extent was bound to DOC, which is consistent with previous research. The results also suggest that the hydrophilic fraction of the MSWI bottom ash DOC is important for Cu complexation and that the pH-dependence for Cu complexation to MSWI bottom ash DOC is smaller than for natural DOC. This implies that models calibrated for natural DOC may give inconsistent simulations of Cu-DOC complexation in MSWI bottom ash leachate. / QC 20101217

This thesis investigates the challenges and opportunities for waste management and circular innovation in the context of sustainable development in Zanzibar, with a specific focus on the relevance of youth circular entrepreneurship. Addressing the low integration of stakeholders, inadequate technical support for young innovators, and challenges in leveraging funding, this study aims to provide insights and recommendations to enhance circularity and waste management systems on the islands. Through a comprehensive literature review, qualitative interviews, and analysis of relevant policies and initiatives, the research uncovers the complex dynamics within Zanzibar's waste management value chain. The findings underscore the urgent need for improved stakeholder collaboration, emphasizing the active participation of government agencies, businesses, communities, civil society organizations, and youth entrepreneurs to drive sustainable practices. The study highlights the crucial role of youth circular entrepreneurship in fostering innovation and driving the transition to a circular economy. It identifies the limited technical support, resources, and infrastructure available to young innovators as key barriers, underscoring the necessity of capacity-building programs, mentorship initiatives, and tailored support mechanisms to empower and enable youth entrepreneurs to contribute to waste management and circular innovation. Furthermore, the research reveals the challenges associated with funding and investment for circular initiatives. It emphasizes the significance of climate finance, public-private partnerships, and the mobilization of international funding sources to overcome financial constraints and create an enabling environment for youth circular entrepreneurship. Based on the analysis, this thesis proposes a range of strategies to enhance circularity in Zanzibar, with a particular emphasis on engaging and empowering youth. These strategies encompass stakeholder collaboration, policy development, education and awareness campaigns targeted at youth, technological advancements, and the establishment of financial mechanisms to support youth-led circular innovation. By addressing the identified challenges and capitalizing on the opportunities, Zanzibar can foster a circular economy that not only addresses environmental concerns but also unlocks economic opportunities, resource efficiency, and community well-being. This research contributes to the knowledge base on waste management and circular innovation in Zanzibar, providing a foundation for future research and action toward sustainable development, with a specific focus on youth circular entrepreneurship.

京都大学 / 新制・論文博士 / 博士(工学) / 乙第13545号 / 論工博第4208号 / 新制||工||1984(附属図書館) / (主査)教授 米田 稔, 教授 松井 康人, 准教授 福谷 哲 / 学位規則第4条第2項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

I Sverige sker i dagsläget ingen återvinning av färg. Istället bränns omhändertaget färgavfall medan återstående slaggprodukter läggs på deponi. Däremot förekommer återvinning av färg i bland annat USA. Med denna bakgrund har syftet med denna studie varit att undersöka om det med hänsyn till produktsäkerhet och kvalité är tekniskt möjligt att återvinna färg samt undersöka hur återvinning av färg skulle påverka miljön. Återvinning av färg har gjorts på försök genom att ta 1 dl färg från totalt 127 färgburkar som annars skulle blivit avfall. Den återvunna färgens fysikaliska egenskaper och sammansättning har undersökts med avseende på densitet, torrsubstanshalt, glödförlust, askhalt och metallhalt. Av intresse ur produktsäkerhetssynpunkt är att endast mycket låga metallhalter uppmättes vilket indikerar att produktsäkerhet inte är ett hinder för färgåtervinning. Utöver fysikaliska egenskaper och sammansättning har även den återvunna färgens kvalité undersökts. Utifrån de lärdomar som kan dras från detta projekt görs sammantaget bedömningen att det är fullt möjligt få en färg med godtagbar kvalité genom återvinning av färg. Oberoende av dessa huvudsakligen praktiska tester har miljöpåverkan av färgåtervinning undersökts genom att undersöka hur tillverkning av ny färg påverkar miljön. Av den totala miljöpåverkan vid tillverkning av färg sker 84-96 % vid utvinning av råmaterial vilket är en stark indikation att återvinning av färg har en potential att bidra till en bättre miljö. / In Sweden, no recycling of paint currently takes place. Instead paint waste is incinerated while the remaining ashes are put in a landfill. However, recycling of paint already exists in the United States. With this background, the aim of this study has been to examine if it technically possible to recycle paint, in regards to products safety and quality, and to examine how recycling of paint would affect the environment. As part of this study paint has been recycled by taking 1 dl of paint from a total of 127 paint cans out of the waste stream at a local recycling station. The physical characteristics and composition of the recycled paint has been examined (density, dry matter content, loss on ignition, ash content and metal content). Of interest in regards to product safety is that the recycled paint contained only relatively low concentrations of metals. This indicates that product safety is not an obstacle for paint recycling. In addition to physical characteristics and composition, the qualities of the recycled paint have been evaluated. Based on the lessons learned in this project the overall conclusion is that it would be fully possible to obtain paint of acceptable quality through recycling. Moreover a study has been made on how recycling of paint would affect the environment by studying the environmental impacts of paint manufacturing. An important finding is that the extraction of raw materials accounts for 84-96 % of the total environmental impact of paint manufacturing. This is a strong indication that paint recycling has a potential to benefit the environment.

Sophantering är av avgörande betydelse för folkhälsan i utvecklingsländer. I Uganda är ett av huvudproblemen för folkets hälsa den bristfälliga sophanteringen. För att fastställa problemet har vi genomfört en fallstudie under 10 veckor genom att studera hur sophanteringen fungerar i staden Mbale (Uganda) samt vilka konsekvenser denna får för befolkningens hälsa. Intervjuer, observationer och dokument har använts för att få en detaljerad beskrivning av fenomenet. Studien ger en bakgrund till vikten av en adekvat sophantering för folkets hälsa samt en introduktion till landet Uganda. I resultatet ges en utförlig beskrivning av hur sophanteringen ser ut i Industrial division, Mbale och vilka problem som påverkar den. I diskussionen redogörs för underliggande problem utifrån A. Sens teori Utveckling som frihet. B. Murphy’s modell The fourth dimension of health promotion används för att utvärdera det hälsoarbete som görs samt ge förslag till förbättring. Problemen kan sammanfattas genom att poängtera vikten av att samhället tar sitt ansvar för befolkningen bl.a. genom prioritering av infrastrukturen. Långsiktiga och hållbara lösningar bottnar i bekämpandet av korruption och fattigdom. Det förebyggande hälsoarbetet behöver förändras till att bli mer empowerment baserat. / Waste management is of crucial concern for public health in developing countries. In Uganda one of the main problems connected to public health is a poor waste management system. To define the problem of waste management and to investigate its consequences for people’s health we made a case study during ten weeks in Mbale, Uganda. Interviews, observations and documents have been studied. Uganda as a country is introduced in the background and the importance of waste management for the public’s health is explained. An extensive description of how waste management works in Industrial division, Mbale and the problems affecting it is given in the results. In the discussion the underlying problems are described with the help of A Sen’s theory Development as freedom. B. Murpy’s model The fourth dimension of health promotion is used to evaluate the health promotion work that exists and to give suggestions of improvements. The problems can be summarised with the importance for the society to take responsibility for the population e.g. by prioritising the infrastructure. Sustainable and long-term solutions are grounded in combating corruption and poverty. A change in the health promotion work needs to be done and based upon empowerment.

Thailand is called the kitchen of the world; the country produces food and beverage products and exports around the globe. According to previous studies, there is not enough data on food waste in Thailand and worldwide. This study aims to analyse the characteristic of the loop of learning in assisting the process of organizational change and explain how it can support sustainable change in Food Waste Management. Even though a loop of learning is used frequently to develop changes in organizations, the relationship between organisational learning methods and organisational change is still not yet identified.  The qualitative method, particularly a case study, was used to accomplish the aim. The case study focuses on how production companies develop their organisational change toward sustainable Food Waste Management in Thailand by aligning the management's thinking level with a loop of learning. The data collection method is a semi-structured interview with 12 managers of different food and beverage manufacturing companies. The results show that current actions are 1) following the existing regulation and finding solutions for challenges, 2) developing better methods and re-using waste, and 3) setting new strategies to achieve sustainable Food Waste Management. Thus, those actions have the quality of single, double and triple-loop learning.  Furthermore, the research findings indicate that changing norms with environmental concerns can influence other factors, such as laws and stakeholder expectations. The organizational change process must involve continually thinking in the loop of learning from an individual and organisational perspective. These authors conclude that the nature of loop learning is a process that individuals and organizations can use to identify and reclaim problems; this process assists organization to realise the need for changes and continue developing solutions for those matters. The outcomes of continuous thinking will present changes in action which reach organisational change.

Textile waste amounts and its utilization are pressing problems in the EU today, with further expected worsening as legislations come into play, increasing collection rates. The EU strives towards a more sustainable future, however this future might entail initial disimprovement, as consumption and disposal behaviour are further expected to increase. The study showed by mapping the future material flow that potential scenarios are severe, in waste volumes and it is unclear how they will be handled and utilized. It is of highest importance to prepare to mitigate them through levers that enable preferred circular flows towards a more sustainable future. Reusing clothing might be such a lever that promises to partially substitute the demand for new products. Through quantitative research and a systemic and dynamic analysis, this study concludes that waste management remains an even more acute problem, whilst slowing consumption through reuse and maintenance of existing products might be a (small) step in the right direction.