Rates and energies of consumption (C), egestion (F), assimilation (A), respiration (R), growth (Pg), production of exuviae (Pev), and production of egg masses (Pr) and associated efficiencies, and the effects of seasonal temperature, weight and metamorphic stage upon these factors were examined for a typical individual and cohort of Corydalus cornutus (L.) from a stream in North-Central Texas (330 23'N, 97*5'W). Dobson flies are apparently univoltine in the study area, with 11 larval instars. Emergence, oviposition and hatching occur from late May to August. The typical dobson fly hatches in mid-June, grows rapidly until November, and resumes rapid growth in March, reaching full adult size prior to leaving the stream to pupate in early June. Adult females must feed to provide energy to yolk eggs, produce egg-mass coverings and continue somatic maintenance during their week of reproductive endeavors. Metabolic compensation enables larval dobson flies to maintain preferred and fairly constant rates of R during winter (201-451 pl g-1 h~1; 5-15 C) and summer (985-1173 pl g- h1; 20-30 C); with a seasonal acclimatization change point between 15-20 C. Reduction of rates of R through undercompensation during the winter when food is scarce and through partial compensation at high temperatures during the summer conserves energy which is allocated to P, resulting in high ratios of P/R (1.94) and P/A (66%) for the individual larva and, to a lesser degree, for the cohort (P/R = 1.07, P/A = 52.3%, P/B = 9.96). Rates of C, F, A and R, but not assimilation efficiency, were influenced by temperature and size. The energy budget for a typical dobson fly during the 47 wk as a larva was: C = 4167, A = 3442, F = 725, Pg = 2075, Pev = 198, and R = 1169. Ova respired 0.107 cal wk-1, prepupae 357 cal wk~ 1 , male pupae 509 cal wk~ 1 , female pupae 454 cal wk~1 , male adults 625 cal wk-l1 and female adults 735 cal wk-1 . The prepupa and pupa shed exuviae of 144 cal and 120 cal respectively. The average female produced 667 cal of eggs and 185 cal of egg-case material, which totaled 54% of adult female A. The annual energetics of the cohort of larvae was: C = 39,150, A = 32,642, F = 6876, Pg = 13,052, Pev = 3608, Pr= 359-409 and R = 15,982 cal m- 2

Energy audit and calculation strategies for energy flows in buildings: a case study of Vallongatan 1   This thesis involves an energy audit of a building with offices and laboratories in Uppsala, Sweden. The calculations are performed in Microsoft Excel and were later used as the basis for developing calculation strategies for similar, future, energy audits.   The building was erected in the early 1990s and the heating requirement of just above 700 MWh is covered by district heating from the city network. The total gross floor area is about 8400 m2 and is served by an air conditioning system consisting of seven ventilation units with rotary heat exchangers, heating and cooling coils, as well as water radiators throughout the building.   No significant improvement measures have been implemented since the construction, and the building therefore has a potential to improve its energy performance. The report addresses a number of measures that could be taken, as well as an evaluation of each one. The most economically viable of these would be to clean the rotary heat exchangers, which is deemed to have a potential to save about 70 MWh or 48 700 SEK annually. In comparison to the estimated cost of between 35 000 and 42 000 SEK this is likely to become profitable as early as the first year.   The calculation templates that were developed cover three different building standards, these are categorized as low, improved and advanced standard. Here, the desired areas and types of activities are typed in easily for either individual rooms or entire offices or buildings. The templates provide estimates regarding power and energy needs for heating and comfort cooling, recommended air flows, heat development and dissipation as well as carbon dioxide concentration in the room air.

A preocupação mundial com a sustentabilidade tem levado as organizações a investigar, cada vez mais, alternativas para melhorar a sua desempenho ambiental e, assim, garantir o desenvolvimento dos seus negócios de forma sustentável. Com o passar dos anos, a literatura tem apresentado diferentes estratégias para apoiar a evolução de empresas ambientalmente conscientes, embora muito pouco tenha se explorado com relação ao potencial para promover a sustentabilidade inerente às práticas de manufatura já existentes. Com o propósito de promover o desenvolvimento de uma cultura de melhoria contínua, lean thinking, ou pensamento enxuto, descreve uma filosofia de trabalho aplicada por muitas empresas de manufatura, a qual foca a eliminação de desperdícios e a aplicação de recursos somente onde há criação de valor para o cliente final. Seguindo essa ideia, o mesmo pensamento de se fazer mais com menos do lean thinking pode ser adaptado para a melhoria dos fluxos que são suporte à produção, isto é materiais, energia e geração de resíduos os quais causam significativo impacto ambiental, contribuindo, assim, para o desenvolvimento de negócios mais sustentáveis. A literatura apresenta diversas evidencias nas quais não só o uso da filosofia lean ajudou na redução de impacto ambiental, mas também exemplos em que a integração dos conceitos de lean e meio ambiente, Lean e Green, é positiva e complementar para redução de resíduos e perdas na produção. Entretanto, não foram encontrados outros estudos com o propósito especifico de utilizar o lean para redução do impacto ambiental na manufatura, incluindo a utilização de um pré-requisito, em termos de nível de desenvolvimento e conhecimento de lean, como requerimento crítico para sua aplicabilidade. O principal objetivo desse projeto é propor um novo modelo, chamado de Lean & Green Business Model (L&GBM). Integrando conceitos de lean e meio ambiente através do desenvolvimento de kaizens em células e em todo fluxo de produção, o modelo desenvolvido tem como principal objetivo a redução do impacto ambiental gerado pelos processos produtivos. O projeto desenvolvido reporta os resultados da aplicação do Modelo Lean e Green em uma corporação multinacional de engenharia, incluindo os resultados do desdobramento do mesmo em diferentes circunstancias: (1) teste piloto em duas células, (2) aplicação do modelo em sete células, (3) aplicação do modelo para células irmãs, (4) aplicação do modelo para fluxo de produção, (5) aplicação do modelo em diferentes ambientes da manufatura. Alguns dos principais resultados identificados até este momento através do desenvolvimento dessa pesquisa incluem: (i) L&GBM é uma boa estratégia de prevenção da poluição, reduzindo de 12 a 35% a aplicação dos fluxos de massa e energia, (ii) L&GBM pode ser usado para reduzir custos, isto é, custos da manufatura de 2 a 8%, (iii), L&GBM adiciona uma nova dimensão ao modelo tradicional de lean, (iv) L&GBM integra completamente os conceitos de lean e sustentabilidade ambiental e (v) L&GBM requer um nível de estabilidade na manufatura para ser aplicado. / Global awareness regarding environmental sustainability has prompted enterprises to investigate different alternatives for improving environmental performance in order to deploy sustainable businesses. There is a growing body of literature proposing different sustainability alternatives for environmentally-conscious firms, although not many have really explored the sustainability side of existent manufacturing strategies. With the purpose of promoting a continuous improvement culture within the business, lean thinking describes a working philosophy applied by many manufacturers, which considers the expenditure of resources for any goal other than the creation of value for the end customer, to be wasteful. Therefore, the same idea of doing more with less from lean thinking can be applied for improving material, energy flows and wastes streams that cause significant environmental impacts, thus supporting the development of a sustainable business. There has been lots of anecdotal evidence that a lean approach can help make the business case for environmental impact reduction and an integrated Lean and Green works for (1) reduction of production waste, (2) reduction of environmental impact but little empirical evidence to substantiate this. The main objective of this project is to propose a new model, which is called Lean & Green Business Model (L&GBM). In this model, environmental sustainability is integrated into pure lean thinking. The model presented in here adopts a Kaizen approach to improve mass and energy flows in manufacturing environments that already possess the necessary deployment level to apply lean thinking. Evidence-based results are first reviewed. It is presented findings to support the need of manufacturing stability as a prerequisite for integrating lean and green at the manufacturing level. The integrated lean and green approach results in (i) a reduction in production waste and (ii) a reduction in environmental impact. The project reports the findings of application of the model in a major engineering international corporation, including the results of the model deployment in several different circumstances: (1) pilot testing in two cells, (2) cell roll out in seven cells, (3) application for sisters’ cells, (4) application for a value stream and (5) application in different manufacturing environments. Some of the research key findings identified include: (i) L&GBM is a good pollution prevention strategy, reducing from 12 to 35% mass and energy flows, (ii) L&GBM can be used to reduce costs, reducing operational manufacturing mass and energy flow costs by 2 to 8%, (iii) L&GBM introduces a new dimension into traditional lean thinking, the environmental concerns, motivating a conceptual transition, (iv) L&GBM fully integrates lean thinking and green thinking, merging the fundamental principles of lean and green thinking (v) L&GBM requires a sufficient level of manufacturing stability and lean deployment prior to its introduction.

A preocupação mundial com a sustentabilidade tem levado as organizações a investigar, cada vez mais, alternativas para melhorar a sua desempenho ambiental e, assim, garantir o desenvolvimento dos seus negócios de forma sustentável. Com o passar dos anos, a literatura tem apresentado diferentes estratégias para apoiar a evolução de empresas ambientalmente conscientes, embora muito pouco tenha se explorado com relação ao potencial para promover a sustentabilidade inerente às práticas de manufatura já existentes. Com o propósito de promover o desenvolvimento de uma cultura de melhoria contínua, lean thinking, ou pensamento enxuto, descreve uma filosofia de trabalho aplicada por muitas empresas de manufatura, a qual foca a eliminação de desperdícios e a aplicação de recursos somente onde há criação de valor para o cliente final. Seguindo essa ideia, o mesmo pensamento de se fazer mais com menos do lean thinking pode ser adaptado para a melhoria dos fluxos que são suporte à produção, isto é materiais, energia e geração de resíduos os quais causam significativo impacto ambiental, contribuindo, assim, para o desenvolvimento de negócios mais sustentáveis. A literatura apresenta diversas evidencias nas quais não só o uso da filosofia lean ajudou na redução de impacto ambiental, mas também exemplos em que a integração dos conceitos de lean e meio ambiente, Lean e Green, é positiva e complementar para redução de resíduos e perdas na produção. Entretanto, não foram encontrados outros estudos com o propósito especifico de utilizar o lean para redução do impacto ambiental na manufatura, incluindo a utilização de um pré-requisito, em termos de nível de desenvolvimento e conhecimento de lean, como requerimento crítico para sua aplicabilidade. O principal objetivo desse projeto é propor um novo modelo, chamado de Lean & Green Business Model (L&GBM). Integrando conceitos de lean e meio ambiente através do desenvolvimento de kaizens em células e em todo fluxo de produção, o modelo desenvolvido tem como principal objetivo a redução do impacto ambiental gerado pelos processos produtivos. O projeto desenvolvido reporta os resultados da aplicação do Modelo Lean e Green em uma corporação multinacional de engenharia, incluindo os resultados do desdobramento do mesmo em diferentes circunstancias: (1) teste piloto em duas células, (2) aplicação do modelo em sete células, (3) aplicação do modelo para células irmãs, (4) aplicação do modelo para fluxo de produção, (5) aplicação do modelo em diferentes ambientes da manufatura. Alguns dos principais resultados identificados até este momento através do desenvolvimento dessa pesquisa incluem: (i) L&GBM é uma boa estratégia de prevenção da poluição, reduzindo de 12 a 35% a aplicação dos fluxos de massa e energia, (ii) L&GBM pode ser usado para reduzir custos, isto é, custos da manufatura de 2 a 8%, (iii), L&GBM adiciona uma nova dimensão ao modelo tradicional de lean, (iv) L&GBM integra completamente os conceitos de lean e sustentabilidade ambiental e (v) L&GBM requer um nível de estabilidade na manufatura para ser aplicado. / Global awareness regarding environmental sustainability has prompted enterprises to investigate different alternatives for improving environmental performance in order to deploy sustainable businesses. There is a growing body of literature proposing different sustainability alternatives for environmentally-conscious firms, although not many have really explored the sustainability side of existent manufacturing strategies. With the purpose of promoting a continuous improvement culture within the business, lean thinking describes a working philosophy applied by many manufacturers, which considers the expenditure of resources for any goal other than the creation of value for the end customer, to be wasteful. Therefore, the same idea of doing more with less from lean thinking can be applied for improving material, energy flows and wastes streams that cause significant environmental impacts, thus supporting the development of a sustainable business. There has been lots of anecdotal evidence that a lean approach can help make the business case for environmental impact reduction and an integrated Lean and Green works for (1) reduction of production waste, (2) reduction of environmental impact but little empirical evidence to substantiate this. The main objective of this project is to propose a new model, which is called Lean & Green Business Model (L&GBM). In this model, environmental sustainability is integrated into pure lean thinking. The model presented in here adopts a Kaizen approach to improve mass and energy flows in manufacturing environments that already possess the necessary deployment level to apply lean thinking. Evidence-based results are first reviewed. It is presented findings to support the need of manufacturing stability as a prerequisite for integrating lean and green at the manufacturing level. The integrated lean and green approach results in (i) a reduction in production waste and (ii) a reduction in environmental impact. The project reports the findings of application of the model in a major engineering international corporation, including the results of the model deployment in several different circumstances: (1) pilot testing in two cells, (2) cell roll out in seven cells, (3) application for sisters’ cells, (4) application for a value stream and (5) application in different manufacturing environments. Some of the research key findings identified include: (i) L&GBM is a good pollution prevention strategy, reducing from 12 to 35% mass and energy flows, (ii) L&GBM can be used to reduce costs, reducing operational manufacturing mass and energy flow costs by 2 to 8%, (iii) L&GBM introduces a new dimension into traditional lean thinking, the environmental concerns, motivating a conceptual transition, (iv) L&GBM fully integrates lean thinking and green thinking, merging the fundamental principles of lean and green thinking (v) L&GBM requires a sufficient level of manufacturing stability and lean deployment prior to its introduction.

A preocupação mundial com a sustentabilidade tem levado as organizações a investigar, cada vez mais, alternativas para melhorar a sua desempenho ambiental e, assim, garantir o desenvolvimento dos seus negócios de forma sustentável. Com o passar dos anos, a literatura tem apresentado diferentes estratégias para apoiar a evolução de empresas ambientalmente conscientes, embora muito pouco tenha se explorado com relação ao potencial para promover a sustentabilidade inerente às práticas de manufatura já existentes. Com o propósito de promover o desenvolvimento de uma cultura de melhoria contínua, lean thinking, ou pensamento enxuto, descreve uma filosofia de trabalho aplicada por muitas empresas de manufatura, a qual foca a eliminação de desperdícios e a aplicação de recursos somente onde há criação de valor para o cliente final. Seguindo essa ideia, o mesmo pensamento de se fazer mais com menos do lean thinking pode ser adaptado para a melhoria dos fluxos que são suporte à produção, isto é materiais, energia e geração de resíduos os quais causam significativo impacto ambiental, contribuindo, assim, para o desenvolvimento de negócios mais sustentáveis. A literatura apresenta diversas evidencias nas quais não só o uso da filosofia lean ajudou na redução de impacto ambiental, mas também exemplos em que a integração dos conceitos de lean e meio ambiente, Lean e Green, é positiva e complementar para redução de resíduos e perdas na produção. Entretanto, não foram encontrados outros estudos com o propósito especifico de utilizar o lean para redução do impacto ambiental na manufatura, incluindo a utilização de um pré-requisito, em termos de nível de desenvolvimento e conhecimento de lean, como requerimento crítico para sua aplicabilidade. O principal objetivo desse projeto é propor um novo modelo, chamado de Lean & Green Business Model (L&GBM). Integrando conceitos de lean e meio ambiente através do desenvolvimento de kaizens em células e em todo fluxo de produção, o modelo desenvolvido tem como principal objetivo a redução do impacto ambiental gerado pelos processos produtivos. O projeto desenvolvido reporta os resultados da aplicação do Modelo Lean e Green em uma corporação multinacional de engenharia, incluindo os resultados do desdobramento do mesmo em diferentes circunstancias: (1) teste piloto em duas células, (2) aplicação do modelo em sete células, (3) aplicação do modelo para células irmãs, (4) aplicação do modelo para fluxo de produção, (5) aplicação do modelo em diferentes ambientes da manufatura. Alguns dos principais resultados identificados até este momento através do desenvolvimento dessa pesquisa incluem: (i) L&GBM é uma boa estratégia de prevenção da poluição, reduzindo de 12 a 35% a aplicação dos fluxos de massa e energia, (ii) L&GBM pode ser usado para reduzir custos, isto é, custos da manufatura de 2 a 8%, (iii), L&GBM adiciona uma nova dimensão ao modelo tradicional de lean, (iv) L&GBM integra completamente os conceitos de lean e sustentabilidade ambiental e (v) L&GBM requer um nível de estabilidade na manufatura para ser aplicado. / Global awareness regarding environmental sustainability has prompted enterprises to investigate different alternatives for improving environmental performance in order to deploy sustainable businesses. There is a growing body of literature proposing different sustainability alternatives for environmentally-conscious firms, although not many have really explored the sustainability side of existent manufacturing strategies. With the purpose of promoting a continuous improvement culture within the business, lean thinking describes a working philosophy applied by many manufacturers, which considers the expenditure of resources for any goal other than the creation of value for the end customer, to be wasteful. Therefore, the same idea of doing more with less from lean thinking can be applied for improving material, energy flows and wastes streams that cause significant environmental impacts, thus supporting the development of a sustainable business. There has been lots of anecdotal evidence that a lean approach can help make the business case for environmental impact reduction and an integrated Lean and Green works for (1) reduction of production waste, (2) reduction of environmental impact but little empirical evidence to substantiate this. The main objective of this project is to propose a new model, which is called Lean & Green Business Model (L&GBM). In this model, environmental sustainability is integrated into pure lean thinking. The model presented in here adopts a Kaizen approach to improve mass and energy flows in manufacturing environments that already possess the necessary deployment level to apply lean thinking. Evidence-based results are first reviewed. It is presented findings to support the need of manufacturing stability as a prerequisite for integrating lean and green at the manufacturing level. The integrated lean and green approach results in (i) a reduction in production waste and (ii) a reduction in environmental impact. The project reports the findings of application of the model in a major engineering international corporation, including the results of the model deployment in several different circumstances: (1) pilot testing in two cells, (2) cell roll out in seven cells, (3) application for sisters’ cells, (4) application for a value stream and (5) application in different manufacturing environments. Some of the research key findings identified include: (i) L&GBM is a good pollution prevention strategy, reducing from 12 to 35% mass and energy flows, (ii) L&GBM can be used to reduce costs, reducing operational manufacturing mass and energy flow costs by 2 to 8%, (iii) L&GBM introduces a new dimension into traditional lean thinking, the environmental concerns, motivating a conceptual transition, (iv) L&GBM fully integrates lean thinking and green thinking, merging the fundamental principles of lean and green thinking (v) L&GBM requires a sufficient level of manufacturing stability and lean deployment prior to its introduction.

This thesis provides new insight concerning drivers behind differences in arthropod diversity and abundance in Baltic shore ecosystems and how the arthropod communities might be affected when the conditions in the Baltic Sea are altered due to climate change.  The focus has been on climate related changes that are unique for coastal ecosystems, especially sea level rise and changes in the inflow of marine nutrients. As sea levels rise, features in coastal landscapes will be altered, islands and habitats will be flooded and diminished, and structural connectivity within the island landscape will therefore change. This thesis shows that arthropod diversity within the two arthropod groups, spiders and beetles, increases with island size but also that diversity is positively influenced by a high number of islands in the surroundings. A changed distribution and occurrence of marine species, due to climate change or eutrophication, can also affect terrestrial organisms on the shore.  In the Baltic Sea the new conditions following climate change will decrease the prevalence of bladder-wrack and benefit filamentous algae. Algal deposits on shores reflect the marine species composition and a decreased prevalence of bladder-wrack in the Baltic Sea will also be visible on the shores.  This thesis shows that a lower proportion of bladder-wrack in the algal deposits will decrease the diversity and abundance of arthropods in these deposits. Changes in the marine environment may also affect the inflow of insects with aquatic life stages and terrestrial adult stages.  On Baltic shores, prey species with aquatic life stages, especially chironomids, constitute a large proportion of the diet of the terrestrial predatory group, wolf spiders. In freshwater system, the inflow of chironomids is known to decrease with elevated water temperatures if this is true in the Baltic Sea prey availability of wolf spiders would decrease.  This thesis supports the importance of chironomids as a prey for coastal wolf spiders, but also shows that the diet varies over season with dominance of terrestrial prey in early summer shifting to a dominance of marine prey in late summer and autumn. This seasonal variation is primarily due to a gradual increase in the consumption of chironomids over season. Climate change has the potential to alter the biogeographical conditions in coastal landscapes as well as the density and quality of marine nutrient inflow. Sea level rise will diminish and flood islands and this thesis shows that a moderate sea level rise of 0.5 meters would make the total number of islands in the outer part of Stockholm archipelago decrease with about 25 %. Sea level rise could thus have consequences for arthropod diversity in Baltic shore meadows in the near future. The combined effects of sea level rise and changed prevalence of marine species in the Baltic Sea will affect the abundance and diversity of arthropods substantially. The abundance and diversity of spiders and beetles will decrease on shores that today have a high occurrence of bladder-wrack and prey availability for coastal predators might decrease due to a decreased inflow of chironomids. Changes in the arthropod communities could have consequences also further up in the food chain, such as for shore birds feeding on these arthropods. / <p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 3: Manuscript. Paper 4: Manuscript.</p>

L’écologie territoriale est un champ de recherche qui propose d’analyser le fonctionnement d’un territoire sous l’angle des flux de matières et d’énergie qui le traversent et le caractérisent. Cette analyse est notamment menée à travers le concept du métabolisme territorial. Sous cet angle, les flux sont envisagés à la fois dans leur dimension matérielle et à la lumière des systèmes d’acteurs et des enjeux socio-économiques et politiques qui les influencent. L’écologie territoriale tend en cela à mettre en exergue des leviers de transition socio-écologique à l’échelle des territoires.Cette thèse propose la mise à l’épreuve de ces concepts à travers un terrain d’étude situé dans la moyenne vallée du Rhône. En remontant à la fin du XVIIIe siècle, la recherche souligne tout d’abord comment se met en place, à l’échelle de celui-ci, un régime socio-écologique fondé sur l’industrie et les infrastructures lourdes. Ensuite, à partir de l’analyse de quatre types de flux (énergétiques, hydriques, toxiques, alimentaires), la thèse propose de caractériser la manière dont ce régime se matérialise aujourd’hui dans le métabolisme. Ce métabolisme est alors qualifié d’intensif et de toxique – par l’intensité et la toxicité des flux mis en jeu – ainsi que d’absorbant – en ce qu’il assure des fonctions métaboliques répondant aux besoins d’autres territoires (traitement de déchets, production alimentaire). Les caractéristiques de ce métabolisme impliquent alors une faible capacité des acteurs locaux (habitants, acteurs publics, agriculteurs) à agir sur les flux pour leur réduction ou leur transformation. Pourtant, dans un contexte de mutations des systèmes productifs et de résidentialisation, plusieurs initiatives émergent de ces mêmes acteurs locaux pour comprendre et agir sur les flux de matière et d’énergie, dans une perspective de développement territorial durable. Celles-ci conduisent à des formes de remise en question des équilibres de pouvoir existants mais le régime socio-écologique industriel persiste, en partie en ce que les verrous qui le structurent et l’auto-entretiennent ne sont pas questionnés. / Territorial ecology is a research field which proposes to analyse the functioning of a territory under the perspective of the flows of matter and energy which passes by and characterize it. This analysis is particularly led through the concept of territorial metabolism. Through this lens, flows are considered in their material dimension but also under the light of the actor systems and of the political and socio-economic issues which influence them. Thus, territorial ecology tends to underline socio-ecological transition levers on the scale of territories.This thesis proposes to test these concepts through a field study in the mid Rhône valley. Looking back to the end of the 18th century, the research firstly underlines how a socio-ecological regime is progressively set around the industry sector and the heavy infrastructures at the scale of the territory. Then, the thesis describes how this regime gets materialized into today’s metabolism through the analysis of four different kinds of flows (energy, water, toxic elements, food). This metabolism is described as intensive and toxic – according to the level of intensity and toxicity of the flows at stake – as well as absorbing – in the way it deals with other territories’ metabolic functions (waste management, food production). These properties of the Rhône-Médian’s metabolism implicate limited capacity for local actors (inhabitants, public actors, farmers) to act towards the reduction or the transformation of these flows. However, within a context of change in production systems and of residentialisation, several local initiatives emerge. Through this process, local actors gain a better understanding and better capabilities to act on the flows of energy and matter in order to engage with sustainable territorial development. These local initiatives lead to several forms of reassessment of existing power relationships but the industrial socio-ecological regime remains, partly because some lock-ins which structure and self-sustain this regime are not questioned.

O Brasil é, ao mesmo tempo, o maior produtor e o maior consumidor de carvão vegetal do mundo, com aproximadamente 85% da produção destinada à siderurgia, 12% à cocção de alimentos e os outros 3% às indústrias farmacêuticas, químicas e cimenteiras. O processo de transformação de madeira em carvão vegetal é caracterizado por apresentar baixo rendimento gravimétrico e por gerar outros produtos, como atiço, finos, gases condensáveis e gases não condensáveis. Diante disso, o estudo do fluxo de energia da carbonização é de fundamental importância para relacionar a entrada de madeira (matéria-prima) e a saída de carvão vegetal (principal produto) do processo e, contabilizar a energia disponível e consumida no produto final, representado por uma unidade energética os fatores de produção. O desempenho energético é apresentado na forma de indicadores como balanço, lucratividade e intensidade energética. Dessa forma, este estudo tem como objetivo geral estimar o desempenho energético da produção de carvão vegetal em diferentes processos (fornos retangulares, fornos circulares com fornalha e fornos de encostas) diante da proposição de um modelo téorico utilizando variáveis do processo de carbonização, como o rendimento gravimétrico, o poder calorífico, a umidade (madeira e carvão vegetal), a mão de obra e as operações mecanizadas. Para isso, o trabalho foi conduzido em etapas. A primeira ocorreu com base em um levantamento dos dados da produção realizado por meio de questionários, entrevista e visitas. A segunda, em função da particularidade de cada processo, algumas variáveis foram correlacionados com pesquisas bibliográficas. A terceira sucedeu por meio das estimativas dos materiais utilizados na produção do carvão, assim como a energia envolvida. Ao final, identificou-se que o processo que utiliza o forno de encosta apresenta o melhor desempenho energético e que as variáveis mão de obra e operações mecanizadas pouco influenciam na determinação do desempenho energético. / At the same time, Brazil is the largest producer and largest consumer of charcoal in the world, with approximately 85% of production for the steel industry, 12% for food cooking and the other 3% for the pharmaceutical, chemical and cement industries. The process of transformation of wood into charcoal is characterized by low gravimetric yield and to generate other products, such as ash, fines, condensable gases and non-condensable gases. Therefore, the study of carbonization energy flow is of fundamental importance to relate the input of wood (raw material) and the output of charcoal (main product) of the process and to account for the energy available and consumed in the final product, represented by an energy unit the factors of production. Energy performance is presented in the form of indicators such as balance sheet, profitability and energy intensity. Thus, this study has as a general objective to estimate the energy performance of charcoal production in different processes (rectangular furnaces, furnace circular furnaces and slope furnaces) before proposing a theoretical model using variables of the carbonization process, such as gravimetric efficiency, calorific value, moisture (wood and charcoal), manpower and mechanized operations. For this, the work was conducted in stages. The first one was based on a survey of production data by means of questionnaires, interviews and visits. The second, due to the particularity of each process, some variables were correlated with bibliographical research. The third was achieved by estimating the materials used in the production of coal, as well as the energy involved. At the end, it was identified that the process that uses the hillside furnace presents the best energy performance and that the variables labor and mechanized operations have little influence in the determination of the energy performance.

Models showing the anthropogenic and natural flows of two sustainability indicators; carbon based GHG and energy (as work energy) have been made for the Swedish region Jämtland. The methodology used was inspired by the study sustainability analysis conducted on the small Danish island Samsø using the above two indicators. The aim was to upscale the methodology used for Samsø and make necessary adaptations for Jämtland in order to be able to evaluate sustainability in terms of global warming. We also wanted to study the linkages between research, education and regional sustainability initiatives. Working at a regional level has advantages compared to working at a national or global level, as socio-ecological processes can be covered more extensively to reach a deeper understanding of practical aspects. In parallel to this we have also been participating in local and regional sustainability activities to increase our understanding of practical approaches and human behaviour. Studies of the energy flows in Jämtland show that 46,000 TJ (88% renewable) flows into the region and about 31,000 TJ is exported. The remaining 15,000 TJ (63% renewable) drives ‘the machine Jämtland’. Added to this is about 4000TJ as matter. The total global warming potential (GWP20) impact of Jämtland (as carbon dioxide equivalents, CO 2eq ) indicating influence on the global mean temperature as radiative forcing) is an annual uptake of 2.4 Mton. The total regional emissions, as CO 2eq, from anthropogenic activities, including consumption, are 1500 kton. The region has large emissions of methane, 80kton (6700 kton CO 2eq ), mainly from mires, lakes and animals but also large uptakes of CO2 from assimilation in woody biomass. Jämtland can be regarded as relatively sustainable from several perspectives, but taking the large forests and a population of only 127,000 inhabitants into consideration, the total uptake of CO 2eq is not very large and of the 15,000 TJ driving Jämtland, 37% comes from non-renewable sources. From a national (and global) perspective Jämtland needs to perform better, in view of its considerable reserves of natural resources. How to increase long-term sustainability in the region is a complex issue that requires penetration from many perspectives. Modelling results presented here needs to be interpreted in a broader sustainability context, together with regional stakeholders, to serve as a base for future knowledge development and sustainability activities. / Två modeller har utvecklats för att studera antropogena och naturliga flöden av energi (exergi) och kolbaserade växthusgasflöden i Jämtland. Metodiken har inspirerats av en metodik för att göra hållbarhetsanalyser som genomförts för den lilla danska ön Samsø utifrån dessa båda indikatorer. Att arbeta på regional nivå har fördelar gentemot att arbeta på en nationell eller global nivå eftersom man har större möjligheter att gå ned på djupet både gällande samhälleliga processer och ekologiska processer. Kopplingen mellan siffror och faktiska skeenden blir tydligare. Parallellt med arbetet med de regionala modellerna har vi också deltagit i lokalt och regionalt arbete för att förståelsen omkring praktiska angreppssätt och mänskligt beteende. Studien av energiflöden i Jämtland visar att 46.000 TJ (varav 88% förnyelsebart) flödar in i regionen och 31.000 TJ exporteras ut och att resterande 15.000 TJ (varav 63% förnyelsebart) driver maskineriet Jämtland. Till detta kommer omkring 4000 TJ i form av material. Den totala GWP20-påverkan från Jämtland är ’kylande’ och motsvarar ett upptag av koldioxid-ekvivalenter årligen på 2.4 Mton, vilket ungefär motsvarar emissionen från225.000 genomsnittssvenskar. De totala antropogena emissionerna av CO 2eq , inklusive konsumtion, är 1500 kton. Regionen uppvisar betydande emissioner av metan, 80 kton (motsvarande 6700 kton CO 2eq ) från sjöar, myrar och våtmarker samt djur. Jämtland kan ur flera perspektiv betraktas som relativt hållbart, men tar man de enorma skogsarealerna och den i ett internationellt perspektiv blygsamma befolkningen på 127 000 personer i beaktande är hållbarheten mindre övertygande. Vidare är 37% av den energi som driver Jämtland faktiskt icke-förnyelsebar. Sett ur ett globalt perspektiv och med hänvisning till Jämtlands enorma naturresurser behöver Jämtland prestera bättre. Hur man skall kunna öka den långsiktiga hållbarheten är en komplex fråga som kräver belysning från flera olika perspektiv. Resultat som de som presenteras här måste tolkas tillsammans med regionala intressenter i ett bredare hållbarhetssammanhang för att kunna utarbeta lämpliga implementeringsstrategier. / <p>Vid tidpunkten för framläggningen av avhandlingen var följande delarbete opublicerat: delarbete 4 (manuskript).</p><p>At the time of the defence the following paper was unpublished: paper 4 (manuscript).</p>

Roads are assets to the society and an integral component in the development of a nation’s infrastructure. To build and maintain roads; considerable amounts of materials are required which consume quite an amount of electrical and thermal energy for production, processing and laying. The resources (materials and the sources of energy) should be utilized efficiently to avoid wastes and higher costs in terms of the currency and the environment. In order to enable quantification of the potential environmental impacts due to the construction, maintenance and disposal of roads, an open life cycle assessment (LCA) framework for asphalt pavements was developed. Emphasis was given on the calculation and allocation of energy used for the binder and the additives. Asphalt mixtures properties can be enhanced against rutting and cracking by modifying the binder with additives. Even though the immediate benefits of using additives such as polymers and waxes to modify the binder properties are rather well documented, the effects of such modification over the lifetime of a road are seldom considered. A method for calculating energy allocation in additives was suggested. The different choices regarding both the framework design and the case specific system boundaries were done in cooperation with the asphalt industry and the construction companies in order to increase the relevance and the quality of the assessment. Case-studies were performed to demonstrate the use of the LCA framework. The suggested LCA framework was demonstrated in a limited case study (A) of a typical Swedish asphalt pavement. Sensitivity analyses were also done to show the effect and the importance of the transport distances and the use of efficiently produced electricity mix. It was concluded that the asphalt production and materials transportation were the two most energy consuming processes that also emit the most GreenHouse Gases (GHG’s). The GHG’s, however, are largely depending on the fuel type and the electricity mix. It was also concluded that when progressing from LCA to its corresponding life cycle cost (LCC) the feedstock energy of the binder becomes highly relevant as the cost of the binder will be reflected in its alternative value as fuel. LCA studies can help to develop the long term perspective, linking performance to minimizing the overall energy consumption, use of resources and emissions. To demonstrate this, the newly developed open LCA framework was used for an unmodified and polymer modified asphalt pavement (Case study B). It was shown how polymer modification for improved performance affects the energy consumption and emissions during the life cycle of a road. From the case study (C) it was concluded that using bitumen with self-healing capacity can lead to a significant reduction in the GHG emissions and the energy usage.  Furthermore, it was concluded that better understanding of the binder would lead to better optimized pavement design and thereby to reduced energy consumption and emissions. Production energy limits for the wax and polymer were determined which can assist the additives manufacturers to modify their production procedures and help road authorities in setting ‘green’ limits to get a real benefit from the additives over the lifetime of a road. / <p>QC 20120926</p>