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The present study attempts to clarify questions concerning the validity of participatory strategies by comparing the practical results with the theoretical objectives. To accomplish this, an internationally renowned participatory project, Brazil's Garbage-Purchasing project located in the municipality of Curitiba, is evaluated using the qualitative-based RRA methodology. The findings reveal a project colored by municipal political objectives and where the supposed beneficiaries, residents of the Jardim da Ordem area, refuse any further involvement with the project. The study details how the social and political contexts are determining factors in the development of the participation. Furthermore, it is clearly demonstrated that the absence of appropriate measures to address the community's social structure shows that participation alone does not result in the theoretical objectives---the community's involvement in the decision-making process and the achievement of sustainable development.

<p>Solid waste management is a phenomenon that has been researched for many years. With the development of industries and commerce, waste inputs into waste management programs are crucial, since these are the sectors responsible for the generation of waste and thus the inputs are invaluable when programs are formulated. In order to develop effective waste management strategies, it is important to identify the source of waste generation and the processes that must be followed to minimize waste. The objective of this research was to follow waste from generation to ultimate disposal and to case study why and how differences in waste disposal practices occur in the Breede River District (BRD) and the Cape Metropolitan Area (CMA).</p>

Through the National Environmental Management Act (No. 107 of 1998), the South African Department of Environmental Affairs and Tourism (DEAT) introduced the concept of the Waste Hierarchy (Reduce - Reuse - Recover - Dispose) as the only possible road towards sustainable development. This concept of sustainable waste management was extended into the Polokwane Declaration on Waste Management which identified Zero Waste as the ultimate goal for sustainable waste management systems in South Africa. Zero Waste is defined as the concept of using all waste produced in a certain area for production activities in that area when it is environmentally acceptable, socially equitable and economically viable, with unavoidable residual waste going to landfill. The aim of this thesis is to test the applicability of Zero Waste to post-consumer waste arising from rural and urban areas. The primary reason that this study has been attempted is that little research in South Africa has focused on the demand-side management of post-consumer waste, and that whatever research that has been undertaken has focused almost exclusively on waste management in urban areas. In order to realise the aim of this thesis, two case studies were selected and analysed: one rural and one urban. These case studies were selected due to differences in characteristics of the waste arising from households, existing waste management systems and socio-economic indicators for households in these areas. In each case study, a proposed Zero Waste Scheme was assessed for application based on four sustainability criteria: environmental, social, economical and institutional. The Zero Waste Schemes are based on the conceptual Zero Waste Model (ZWM) that has been specifically developed as the main tool for conducting this research. The development and use of the ZWM in assessing waste management systems in South Africa is a significant contribution of this thesis to knowledge. Generally, the results showed that the proposed Zero Waste Schemes could meet three of the evaluation criteria used in the investigation, but could not meet the fourth: institutional sustainability. For this reason, the Zero Waste Schemes could not be implemented since the municipalities responsible for waste management in those areas did not have the capacity administrative, financial resources and political will - to implement them. Thus, institutional sustainability has been shown to be the main constraint in the application of Zero Waste Schemes in post-consumer waste management systems in South Africa. This is another significant contribution of this thesis to knowledge.Other significant findings from this study reveal that rural areas lack basic waste collection and disposal systems; hence this lack in service delivery prevents full implementation of Zero Waste Schemes in these areas. In contrast, households in urban areas are served by integrated waste management systems that extend to most households, and most of these households are able to finance the waste management services provided. The existence of the integrated waste management systems was used as a basis for introducing waste minimisation and at-source separation of recyclables in order to reduce the amount of waste needing disposal. Education of households in urban areas has been identified as a key factor in establishing Zero Waste Schemes in the case study areas. In conclusion, it has been shown in this thesis that although Zero Waste Schemes are theoretically applicable to rural and urban areas of South Africa, institutional constraints that will have to be overcome in order to make Zero Waste a reality. Implicit in this conclusion is the extension of waste collection services to rural households and the full participation of rural and urban households in Zero Waste Schemes, participation which can only be verified by actual implementation of the schemes. This is the next step in the approach towards Zero Waste within post-consumer waste management in South Africa. / Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2009.

Despite its phasing out in numerous countries, such as Germany and the U.S.A., co-disposal of hazardous waste with municipal solid waste continues to be widely practised in South Africa. Co-disposal utilises properties and microbial activities in the refuse to attenuate the hazardous waste and thus obviate its environmental impact potential. All landfill operations require careful planning in not only site selection criteria but also the type and amount of various wastes accepted for disposal. It is clear, however, that the practice of co-disposal requires special precautions and management as the methods employed in the landfill operation determine to a large extent the environmental effects and, thus, the public acceptability of the operations. Although co-disposal is not suitable for all industrial wastes the results of recent research efforts, conducted mainly in the U.K., have indicated that, when properly managed, co-disposal can be regarded as a safe and efficient disposal option for many hazardous wastes. Environmental awareness in many European countries ensures that numerous hazardous compounds are either recycled or recovered. Unfortunately, in South Africa the lack of similar concern has resulted in increased concentrations of toxic compounds being co-disposed on a regular basis. Since fundamental studies of this technology, pertaining to South African conditions, have been lacking laboratory models/microcosms were built to address this paucity. Model. To effect the separation of species habitat domains of component species of growth rate-dependent interacting microbial associations responsible for terminal catabolic processes of the refuse fermentation, with retention of overlapping activity domains, and so facilitate examination of species in isolation without violating the integrity of each association, multi-stage models were constructed. The accidental overgassing of the culture with liquid petroleum gas (LPG) effected interesting fermentation balance changes which also emphasised the need for an Anaerobic Bioassay Test to assess the impacts of specific perturbants. Evidence of differential susceptibility of the component species to phenol was demonstrated in this study. Microcosm. A total of 42 refuse packed single-stage glass column bioreactors were commissioned and subjected to phenol and/or anaerobically digested sewage sludge codisposal. The effects of four different operational modes: leachate discard (single elution); leachate recycle; batch; and simulated rain on the co-disposals as well as refuse catabolism per se were examined. The results of these studies indicated that protracted periods of adaption to phenol (1000 and 2000 mg l -1) could have resulted from nutrient (elemental) limitation. Circumstantial evidence was also gained which indicated that the nitrate- and sulphate-reducing bacteria (SRB) were particularly sensitive to the added xenobiotic. Further, without the effective participation of the nitrate- and SRB the active and total fermentation of both the phenol and refuse components were depressed. It was also determined that the operating regime employed was a key factor in refuse degradation although with time, and especially following the phenol resupplementations, the operating conditions played a less significant role. In general, the single elution operated columns demonstrated increased phenol removal rates which were, unfortunately, coincident with low pH values and increased leachate residual phenol concentrations. Leachate recycle, on the other hand, unlike the batch operated columns, facilitated increased pH values and methane evolutions. The simulated rain columns were characterised by rapid washout of the added phenol as well as methanogenic precursors. The sewage sludge co-disposal experiments, likewise, demonstrated that, depending on the sludge:refuse ratio, the operating regime was extremely important in optimising the refuse degradation processes although, in general, leachate recycle appeared to be the most favoured method of operation. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1996.

Waste management has received very little attention in Lesotho' s Development Planning. Lack of environmental policy and environmental framework law has resulted in waste being illegally dumped. Inadequate services in the country, coupled with increasing population in the urban areas due to rural-urban migration, has led to litter being a serious environmental problem in the whole country, especially in the urban areas. This study aims to analyse the defects of the waste management strategies in Maseru by investigating the waste management systems employed in two residential areas of different income levels. In addition, this thesis attempts to evaluate the impact of socioeconomic and educational factors on solid waste management practices in Maseru. An investigation into trends or similarities in the services rendered by the Maseru City Council was carried out and compared with the literature reviewed. A survey was conducted as two case studies, mainly to assess the present coverage and the standard of refuse generation, collection and disposal service. Waste was collected from the two study areas and compared in terms of the type and amount of waste. generated. The major factors influencing waste generation were found to be the gender and educational level of the household head, income level of the household and the household size. These were found to be proportional to waste generation and inter-related. In this regard, that families headed by men were found to have higher incomes than those headed by women and were found to produce more waste. Furthermore, in households where the household head had attained a higher level of education, income levels increased, there was a concomitant increase in waste generation. In general, high income residential areas generated more waste than low income residential areas. Large families use more money and consume more food than small families, thus generate more waste. The major component of waste was largely paper and plastic, but glass, cans and organic materials were also recorded. In general, waste management in Maseru (Lesotho) was found to be very poor because of lack of policy and contradicting and scattered sectoral laws dealing with waste management, lack of urban planning and infrastructure. More importantly, waive of laws relating to waste has resulted in land degradation due to illegal dumping and littering. / Thesis (M.Sc.)-University of Natal, Pietermaritzubrg, 1998.

The amount of greenhouse gases (GHG) emitted due to waste management in the cities of developing countries is predicted to rise considerably in the near future; however, these countries have a series of problems in accounting and reporting these gases. This study investigated GHG emissions from the municipal waste sector in South Africa. In particular, the eThekwini Municipality is researched in detail and current emissions as well as further projections have been calculated. This research has to be placed in the wider context where developing countries (including South Africa) do not have binding emission reduction targets, but many of them publish different greenhouse gas emissions data which have been accounted and reported in different ways. Results from the first stages of this research showed that for South Africa, inventories at national and municipal level are the most important tools in the process of accounting and reporting greenhouse gases from waste. However, discrepancies in the methodology used are a concern. This is a challenging issue for developing countries, especially African ones, since higher accuracy methods are more data intensive. Therefore, the development of local emission factors for the different waste management processes is important as it encourages a common, unified approach. In the accounting of GHG from waste at municipal level, emission factors, based on a life cycle approach, are used with increased frequency. However, these factors have been calculated for many developed countries of the Northern Hemisphere and are generally lacking for developing countries. The second part of this research showed how such factors have been developed for waste processes used in this country. For the collection and transport of municipal waste in South Africa, the average diesel consumption is around 5 dm3 (litres) per tonne of wet waste and the associated GHG emissions are about 15 kg CO2 equivalents (CO2 e). Depending on the type of landfill, the GHG emissions from the landfilling of waste have been calculated to range from -145 to 1 016 kg CO2 e per tonne of wet waste, when taking into account carbon storage, and from 441 to 2 532 kg CO2 e per tonne of wet waste, when carbon storage is left out. The highest emission factor per unit of wet waste is for landfill sites without landfill gas collection and these are the dominant waste disposal facilities in South Africa. The emission factors developed for the different recyclables in the country showed savings varying from -290 kg CO2 e (glass) to – 19 111 kg CO2 e (metals - Al) per tonne of recyclable. They also illustrated that there is variability, with energy intensive materials like metals having higher GHG savings in South Africa as compared to other countries. This study also showed that composting of garden waste is a net GHG emitter, releasing 172 and 186 kg CO2 e per tonne of wet garden waste for aerated dome composting and turned windrow composting, respectively. By using the emission factors developed, the GHG emissions from municipal waste in the eThekwini Municipality were calculated and showed that for the year 2012 net savings of -161 780 tonnes CO2 e were achieved. This is mainly due to the landfill gas to electricity clean development mechanism (CDM) projects and due to recycling in the municipality. In the absence of landfill gas (LFG) collection and utilisation systems, which is typical for the majority of South African landfills, important GHG emission from the anaerobic degradation of waste are recorded. In the near future (year 2014) the closure of one of the three local landfill sites and the re-directioning of the majority of waste to another landfill sites which does not have LFG collection and utilisation, will cause an increase of GHG emissions to 294 670 tonnes CO2 e. An increase in recycling and the introduction of anaerobic digestion and composting has the potential to reduce these emissions as shown for the year 2020. However, only the introduction of a LFG to electricity system will result in the highest possible overall GHG savings from waste management in the municipality. In the absence of the Clean Development Mechanism and the associated financial arrangements, these systems have to be financed locally and might present a financial challenge to the municipality. Therefore, the second intervention which will make a difference by lowering GHG emissions from waste management would be to increase recycling in general and in particular the recycling of paper and metals. Since there is no direct competition for carbon, in addition to recycling, anaerobic digestion can be introduced and this combination will achieve increased savings in the future. If anaerobic digestion is not possible, composting in addition to recycling will also lead to savings, albeit not as high as with anaerobic digestion. The results presented in this study show that life cycle based GHG emission factors for waste and their use can support a unified approach to accounting of GHG and better decision-making for municipalities in the local context. They can give valuable input for the planning and development of future waste management strategies and they can help optimise current municipal solid waste management. / Ph.D. University of KwaZulu-Natal, Durban 2013.

Indiana has 7-8 years of landfill capacity remaining until its landfills are full. Delaware County has been without a municipal sanitary landfill since 1985. The purpose of this study was to evaluate Delaware County public opinion on solid waste management issues in order to ultimately include the public in the management process. Two hundred eighty-one Delaware County residents were surveyed by telephone to assess their knowledge and opinions on solid waste management issues. Two sets of conditions were hypothesized to influence attitudes: urban versus rural living environment, and educational level. There was no significant difference (P<0.05) between urban and rural attitudes towards waste management options. There was a difference between responses as a function of educational level; the more educated respondents were more aware of solid waste disposal issues. It was concluded that the public is aware of both national and local waste management issues, and are in favor of legislative control measures. / Department of Natural Resources

Cost-Benefit Analysis (CBA) was applied to evaluate the "Blue Bag" recycling program in Muncie, IN. Data was collected from the Muncie Sanitary District, a waste recovery facility and from a sample of Muncie residents. Results were analyzed descriptively and statistically and compared in terms of environmental performance to a landfilling option. Recycling resulted in greater greenhouse gas (GHG) emissions reduction and also in larger savings in energy consumption compared to landfilling (an equivalent of savings of $25,800.52 per year). A willingness to pay (WTP) parameter ranged from $0-175 in WTP in taxes/rent per year and a $0-52 range for WTP per trash container collected. The mean value of the welfare improvement corresponded with values obtained by other researchers (Hanley and Spash, 1993), totaling $960,797.65 for the WTP in taxes/rent scenario and $412,819.95 for the WTP per trash container collected scenario. The project's Net Present Values (NPV) were negative under the 3, 5 and 7`%, discount rates (-5209,961.75, -8242,477.73 and -S269,187.38 in the case of an optimistic scenario and -S675,244.83, -657.262.23 and -640,288.54 for the pessimistic scenario, respectfully) if environmental impacts were not taken into consideration. Environmental benefits associated with the Blue Bag program impacted results of the analysis - the project's NPVs were positive under the range of 3, 5 and 7% interest rates (510,569.501.26, 9,704,811.17 and 8,951,068.00 for the optimistic scenario and S 10, l 04,218.17, 9,290,026.68 and 8.579,966.84 in the case of pessimistic scenario, respectfully). It is concluded, that if the Blue Bag program is justified on CBA grounds, it can be considered as a profitable initiative from the social point of view; otherwise, the recycling program's costs outweigh its incomes and the existence and continuation of the Blue Bag program may he questioned. Further studies should be conducted in order to comprehensively test the overall social impacts of the program that could affect results presented in this study. / Department of Natural Resources and Environmental Management

Municipal solid waste (MSW) management has been a challenging issue throughout history. Waste management options have evolved, but they can present distinct environmental impacts, such as the emission of greenhouse gases (GHG). This study quantified the environmental benefits (i.e., greenhouse gas emission and energy use reductions) of various MSW management plans proposed for Puerto Rico through the use of the Waste Reduction Model (WARM). The waste management initiative known as the “Base Case” was found to offer the most environmental benefits. Thus, higher benefits can be attained from the implementation of an integrated solid waste management / Department of Natural Resources and Environmental Management