A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science (Geography). Johannesburg, 11 June 2017. / Reclaimer integration in South Africa has been identified as a priority, but how to integrate reclaimers remains a challenge. Crucially, there is not yet a coherent approach or a clear understanding of what reclaimer integration means in South Africa, let alone whether this same understanding of integration is shared by the reclaimers who are being integrated. By focusing on the integration initiatives of the Environment and Infrastructure Services Department (EISD) and Pikitup, this thesis conducts a comparative study of two reclaimer integration projects in Johannesburg. It investigates the breakdown and mismatch of understandings between social actors who do not share the same view of integration and implications thereof. In doing so, it contributes to discourse on the transformation of Johannesburg’s waste management system. Social constructivism theory by Berger and Luckmann (1966) provides the theoretical grounding for this dissertation by exploring how different milieus and experiences shape people’s understanding of realities. Findings illustrate that there is no clear conceptualisation of integration that underpins waste management policy. Drawing on social constructivism theory, the paper concludes that integration is a socially constructed and contested concept. Essentially, there are inconsistent understandings of integration among different groups of reclaimers as well as officials. For that reason, integration programmes created a new form of exclusion and imposed negative effects on reclaimers. KEYWORDS: Integration, Reclaimers, Waste, Policy, Recycling, cooperatives / LG2018

Sustainably managed music festivals have significant value and can provide a multitude of benefits to a healthy, sustainable and desirable society if their negative impacts are mitigated and positive impacts cultivated. To reach this great potential, sustainable event management of music festivals must become widely adopted and expanded as common practice. To drive this improvement of sustainable event management, there is a need to first understand the barriers and success factors event organizers face moving their music festivals toward sustainability. This study uses a research design of mixed quantitative-qualitative methods: a survey of thirty diverse music festival organizers across the United States and interviews with five selected survey participants. Research draws on pertinent literature from sustainability theory and practice, previous research on sustainable event management, existing strategies of sustainable events, and lessons from organizational change studies. Findings revealed seven key barriers and four success factors associated with sustainable event management of music festivals as well as three specific needs of event organizers to improve sustainable event management. With these findings, seven strategies are presented to help event organizers adopt and improve sustainable event management of music festivals. This study is significant because it fills an important gap in the academic literature on events and sustainability. Additionally, this study is immediately applicable to Untied States music festivals. The findings were drawn directly from the perspectives and experiences of event organizers, and the strategies are designed to be specifically applied to their sustainable event management work.

As a result of rapid product development, the product life cycle has become shorter, and thus the amount of waste from discarded industrial products has risen dramatically. An awareness of the world???s environmental problems has stimulated researchers to explore the opportunities to reuse, recycle and remanufacture end-of-life products. Disassembly is a systematic approach to separating products into components or subassemblies in order to facilitate recovery of components or materials. However, the full disassembly of a product tends to be unproductive due to technical and cost constraints and product conditions after usage. Therefore, selective disassembly has been introduced as a more practical approach, where only a limited number of disassembly paths that lead to selected parts with recovering potential are considered. This research focuses on the development of a selective disassembly methodology by reversing an assembly sequencing approach. The methodology uses a step-by-step approach to generate a disassembly sequence diagram. This involves listing all the parts within the product, generating a liaison diagram to illustrate part relationships and then establishing precedence rules describing prerequisite actions for each liaison. This is followed by segregating disassembly paths that lead to the removal of selected parts or subassemblies. Then a winnowing process is applied to these paths to eliminate invalid disassembly states and transitions. The last step is to select the optimal disassembly path by using the time requirement as the main selection criterion. In order to shorten the time for carrying out the sequencing process, a javabased program that is capable of performing the first three steps has been created. The program requires three basic inputs in forms of precedence rules, and user-required part (s) and disassembly rules, prescribing which liaison (s) should be done subsequent to a particular liaison. The viability of the methodology and the program is proved through seven case studies conducted on a fishing reel, a single-hole punch, a kettle, an entire washing machine and three washing machine subassemblies. The application of the program allows the users to determine an optimal disassembly sequence in a very short time and with only basic product information as the input.

published_or_final_version / abstract / toc / Urban Planning and Environmental Management / Doctoral / Doctor of Philosophy

The increasing human population, industrialization, urbanisation and climate change challenges have resulted in an increased demand for already scarce water resources. This has left the agricultural sector with less water for production. Sustainable water management strategies would therefore require accurate determination of water-use. In agriculture, water-use can best be determined from total evaporation which is the loss of water from soil and vegetation to the atmosphere. Accurate quantification of total evaporation from vegetation would require a thorough understanding of water transport processes between vegetation and the atmosphere, especially in a water-scarce country like South Africa. Several methods for estimating total evaporation have been developed and are in use today. Some of the common methods used today are: the Bowen ratio energy balance, eddy covariance, scintillometry, flux variance and surface renewal. However, various methods have advantages and disadvantages. Considerations include the cost of equipment and level of skill required for use of some of the methods. A number of methods involve indirect or direct estimation of sensible heat flux then calculating latent energy flux and hence total evaporation as a residual of the shortened energy balance equation. The main objective of this study is to determine the effects of grassland management practices on the energy balance components as well as on the surface radiation balance. Eddy covariance and surface renewal methods were employed to investigate the effects of grassland management practices (mowing and burning) on the micrometeorology of naturally occurring grassland. A 4.5-ha grassland site (Ukulinga, Pietermaritzburg, South Africa) was divided into two halves: one area was initially mowed (cut-grass site) to a height of 0.1 m while the other was not mowed (tall-grass site). The tall-grass site was later treated by burning and hence referred to as the burnt-grass site. Two eddy covariance systems were deployed, one at each of the cut-grass and the tall-grass sites. The systems each comprised a three-dimensional sonic anemometer to measure high frequency sonic temperature, orthogonal wind speeds and directions and the eddy covariance sensible heat flux (W m-2). Latent energy flux, from which total evaporation was then determined, was calculated as a residual from the shortened energy balance equation from measurements of sensible heat flux, net irradiance and soil heat flux assuming closure is met. Other microclimatic measurements of soil water content, soil temperature, surface reflection coefficient and reflected solar irradiance were performed, the latter with a four-component net radiometer. An automatic weather station was also set up at the research site for continuous measurements of solar irradiance, air temperature, relative humidity, wind speed and direction and rainfall. Water vapour pressure and grass reference evaporation were also determined online. Energy fluxes from the tall-grass site were measured from March to June 2008. Greater total evaporation rates (2.27 mm day-1) were observed at the beginning of the experiment (March). As winter approached most of the energy balance components showed a constant decreasing trend and the average total evaporation rates for May and June were 1.03 and 0.62 mm day-1, respectively. The tall-grass site had consistently lower soil temperatures that changed diurnally when compared to the cut-grass site. The soil water content at both sites showed no significant differences. Most of the energy balance components were similar between the two sites and changed diurnally. Although there were small differences observed between other energy balance components, for example, latent energy flux was slightly greater for the tall-grass site than for the cut-grass site. The tall-grass site had more basal cover and this may have contributed to the differences in temperature regimes observed between the two sites. However, the plants growing at the cut-grass site showed more vigour than the ones at the tall-grass site as spring approached. Burning of a mixed grassland surface caused significant changes to most of the optical properties and energy fluxes of the surface. Following burning, the soil temperature was elevated to noticeable levels due to removal of basal cover by burning. The surface reflection coefficient measured before and after the burn also presented a remarkable change. The surface reflection coefficient was significantly reduced after the burn but a progressive increase was observed as the burnt grass recovered after the spell of spring rains. The energy fluxes: net irradiance, latent energy flux and soil heat flux also increased following the burn but the latent energy flux was reduced as transpiration was effectively eliminated by the burning of all actively transpiring leaves. As a result, the main process that contributed towards latent energy flux was soil evaporation. An ideal surface renewal analysis model based on two air temperature structure functions was used to estimate sensible heat flux over natural grassland treated by mowing. Two air temperature lag times r (0.4 and 0.8 s) were used when computing the air temperature structure functions online. The surface renewal sensible heat fluxes were computed using an iteration process in Excel. The fluxes, obtained using an iterative procedure, were calibrated to determine the surface renewal weighting factor (a) and then validated against the eddy covariance method using different data sets for unstable conditions during 2008. The latent energy flux was computed as a residual from the shortened energy balance equation. The surface renewal weighting factor was determined for each of the two heights and two lag times for each measurement height (z) above the soil surface. The a values obtained during the surface renewal calibration period (day of year 223 to 242, 2008) ranged from 1.90 to 2.26 for measurement height 0.7 m and r = 0.4 and 0.8 s. For a measurement height of 1.2 m and r = 0.4 and 0.8 s, a values of 0.71 and 1.01 were obtained, respectively. Good agreement between surface renewal sensible heat flux and eddy covariance sensible heat flux was obtained at a height of 1.2 m using a = 0.71 and a lag time of 0.4 s. Total evaporation for the surface renewal method was compared against the eddy covariance method. The surface renewal method, for a height of 1.2 m and a lag time of 0.4 s, yielded 1.67 mm while the eddy covariance method yielded 1.57 mm for a typical cloudless day. For the same day for a measurement height of 1.2 m and a lag time of 0.8 s, eddy covariance and surface renewal methods yielded 1.57 and 1.10 mm, respectively. For a lag time of 0.4 s, the surface renewal method overestimated total evaporation by 0.10 mm while for a lag time of 0.8 s, the total evaporation was underestimated by 0.47 mm. As a result, the surface renewal method performed better for z = 1.2 m and a lag time of 0.4 s. The eddy covariance method gave reliable sensible heat fluxes throughout the experiment and this allowed a comparison of fluxes across all treatment areas to be achieved. The short-term analysis of the surface renewal method also gave reliable energy fluxes after calibration. Compared to the eddy covariance method, the surface renewal method is more attractive in the sense that it is easy to operate and use and it is relatively cheap. However, the surface renewal method requires calibration and validation against a standard method such as the eddy covariance method. This study showed that grassland management practices had a considerable effect on surface radiation and energy balance of the mowed and burnt treatment sites. Total evaporation was mainly controlled by the available energy flux, rainfall and grassland surface structure. High total evaporation values were observed during summer when net irradiance was at its highest and grass growth at its peak. Low total evaporation values were observed in winter (dry atmospheric conditions) when net irradiance was at its lowest and most vegetation was dormant. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2011.

No abstract available. / Thesis (MBA)-University of KwaZulu-Natal, Westville, 2011.

Alternative fuel types and technologies are increasingly being advocated for transportation needs to ameliorate concerns around energy security, climate change, and fuel cost. Each fuel type has unique advantages and disadvantages for cost structure and emissions. Meanwhile, corporate fleet customers are often making more sustainable choices of vehicle type due to public perception and other influencing factors. The sustainability of these vehicles can be viewed from a triple bottom line perspective of financial, environmental, and societal implications. However, there is currently a lack of organized knowledge that would allow a decision-maker to elect the appropriate vehicle type beyond lifecycle cost and carbon emissions. The simplification of the impact of fuel type choice disregards issues that are emerging in prominence around water consumption and public health. Water consumption is of particular importance to investigate as fuel types that have reduced carbon emissions are often more water intensive. This thesis develops a tool that examines these issues through modeling to provide a more holistic lifecycle view of a prospective fleet's impact. The choice of vehicle type then can be optimized by utility theory preference elicitation of the different customer desires. Various scenarios of corporate preference and fleet specifications are explored to provide case studies that exemplify the complexity of the decision process. Each potential scenario has its own characteristics that cannot be optimally fulfilled by an overarching fuel type but rather should be thoroughly examined individually to understand the true consequences.

As a result of rapid product development, the product life cycle has become shorter, and thus the amount of waste from discarded industrial products has risen dramatically. An awareness of the world???s environmental problems has stimulated researchers to explore the opportunities to reuse, recycle and remanufacture end-of-life products. Disassembly is a systematic approach to separating products into components or subassemblies in order to facilitate recovery of components or materials. However, the full disassembly of a product tends to be unproductive due to technical and cost constraints and product conditions after usage. Therefore, selective disassembly has been introduced as a more practical approach, where only a limited number of disassembly paths that lead to selected parts with recovering potential are considered. This research focuses on the development of a selective disassembly methodology by reversing an assembly sequencing approach. The methodology uses a step-by-step approach to generate a disassembly sequence diagram. This involves listing all the parts within the product, generating a liaison diagram to illustrate part relationships and then establishing precedence rules describing prerequisite actions for each liaison. This is followed by segregating disassembly paths that lead to the removal of selected parts or subassemblies. Then a winnowing process is applied to these paths to eliminate invalid disassembly states and transitions. The last step is to select the optimal disassembly path by using the time requirement as the main selection criterion. In order to shorten the time for carrying out the sequencing process, a javabased program that is capable of performing the first three steps has been created. The program requires three basic inputs in forms of precedence rules, and user-required part (s) and disassembly rules, prescribing which liaison (s) should be done subsequent to a particular liaison. The viability of the methodology and the program is proved through seven case studies conducted on a fishing reel, a single-hole punch, a kettle, an entire washing machine and three washing machine subassemblies. The application of the program allows the users to determine an optimal disassembly sequence in a very short time and with only basic product information as the input.

O estudo teve como objetivo analisar as práticas sustentáveis e seus determinantes na gastronomia dos meios de hospedagem. Para tal, foram selecionados seis meios de hospedagem na Região das Hortênsias, situados nas cidades de Gramado e Canela, no Rio Grande do Sul. A técnica utilizada para a coleta de dados foi a aplicação de questionário, no qual foram utilizadas questões relacionadas à gestão da sustentabilidade; à certificação em gestão da sustentabilidade; à gastronomia sustentável; às ações sustentáveis no meio de hospedagem e no setor de alimentos e bebidas; à atratividade dos fatores ligados à gastronomia sustentável; às vantagens na adoção da gastronomia sustentável; e ao desperdício de alimentos. Os resultados permitiram concluir que os gestores consideram a redução de custos, a saúde dos hóspedes e o aumento da atratividade do meio de hospedagem como as principais vantagens da adoção de práticas sustentáveis no setor A&B, demonstrando que a gastronomia sustentável pode se manifestar como um benefício econômico para a gestão do meio de hospedagem, assim como para a segurança do turista. Os gestores destacam a preferência por produtores mais próximos do estabelecimento, alimentos da cultura regional e alimentos sazonais, definições que fazem parte também da ecogastronomia. As ações sustentáveis mais indicadas pelos gestores, adotadas pelos meios de hospedagem, são as relacionadas com a sustentabilidade do negócio e gestão de resíduos. Também é necessário considerar que o setor A&B está situado dentro do meio de hospedagem, e que, assim como os outros setores, pode adotar práticas sustentáveis além daquelas indicadas pela norma da certificação em gestão da sustentabilidade aos serviços alimentares. Conclui-se que as orientações para a sustentabilidade, no empreendimento gastronômico, precisam ser promovidas por meio da intersetorialidade, de modo que o setor da gastronomia realize ações sustentáveis de forma mais integrada. Nessa direção, a melhoria contínua na gastronomia sustentável necessita do desenvolvimento de novos saberes, construídos a partir de pesquisas científicas e da interação do conhecimento produzido com técnicas e tecnologias, que reduzam os impactos ambientais; maximizem o desempenho econômico e considerem a cultura e os valores da comunidade local. / The objective of the study was to analyze the sustainable practices and their determinants in the gastronomy of accommodation establishments. To this end, six accommodations were selected in the Região das Hortênsias, located in the cities of Gramado and Canela, in Rio Grande do Sul state. The technique used to collect data was the application of a questionnaire, in which were used questions related to sustainability management; certification in sustainability management; sustainable gastronomy; sustainable actions in the accommodation environment and in the food and beverage sector; attractiveness of factors linked to sustainable gastronomy; advantages in the adoption of sustainable gastronomy; and food waste. The results showed that managers consider cost reduction, guest’s health and the increase of attractiveness of the accommodation environment as the main advantages of adopting sustainable practices in the A&B sector, certifying that sustainable gastronomy can manifest itself as an economic benefit for the management of the hosting environment, as well as for the tourist’s safety. The managers emphasize the preference for manufacturers closer to the establishment, regional and seasonal food, definitions that are also part of ecogastronomy. The sustainable actions most indicated by the managers adopted by the accomodations are those related to the sustainability of the business and waste management. Also, it is necessary to consider that the A&B sector is located within the accommodation environment, and like other sectors, can adopt sustainable practices beyond those indicated by the certification standard of sustainability management of food services. It is concluded that the guidelines for sustainability in gastronomic enterprise need to be promoted through intersectoriality, so that the gastronomy sector performs sustainable actions in a more integrated way. In this direction, continuous improvement in sustainable gastronomy requires the development of new knowledge, built on scientific research, and the interaction of knowledge produced with techniques and technologies that reduce environmental impact, maximize economic performance and consider the culture and values of the local community.

Environmental issues seem to be one of the most important topics in the globalised world. Organisations of all sizes are subject to pressure from suppliers, customers and governments to be more environmentally responsible. This research focuses on implementation of an Environmental Management System (EMS) in the automotive industry, both internationally and in South Africa, and examines the background and concepts of the International Organization for Standardization (ISO), as well as the key implementation phases associated with the implementation of an EMS, in accordance with ISO 14001. The problem statement of this research is to determine if it is possible to transfer, apply and sustain environmental concepts to small, medium or large organisations. The primary objectives of this research, therefore, were to determine: does implementation of an EMS provide economic benefits to organisations; what drives an organisation to first implement an EMS; does implementation of an EMS improve environmental awareness and performance; and what implementation barriers are faced by small, medium and large organisations. To achieve these objectives, a literary review and an empirical survey were conducted. The survey consisted of an electronic, self-administered questionnaire that was circulated to respondents at various automotive organisations. Data collected from completed, returned questionnaires were analysed and graphically presented to complete the research and achieve the primary research objectives toward solving the afore-mentioned problem statement. Based on the findings of this research, it can be concluded that there is much to gain from implementing an EMS.