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Published Article / The waste management practices used at red-meat abattoirs in the Free State province for disposal of condemned products generated in abattoirs and the problems associated with the different waste disposal methods were investigated. Problems caused by various products generated at abattoirs. such as abattoir waste water, blood, stomach contents, manure, whole carcasses, fetuses and all products unsuitable for human consumption requiring disposal were identified. Recommended solutions took into account the most effective handling manner, causing minimum environmental pollution, reducing any health risks to communities, and converting condemned products into value-added by-products by changing certain waste management processes / strategies. The handling of waste, specifically of condemned products, at 78 red meat abattoirs was analysed.

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第21965号 / 工博第4620号 / 新制||工||1720(附属図書館) / 京都大学大学院工学研究科都市環境工学専攻 / (主査)教授 酒井 伸一, 教授 勝見 武, 准教授 平井 康宏 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

The increase in global population and high urbanisation rates characterised by high resource consumption and waste generation levels has led to challenges in waste management around the world. Waste management remains one of the most critical challenges faced by local governments in developing countries. Informal business enterprises have come under the spotlight for their high waste production and poor waste management practices. Many arguments have been put forward as to the real environmental impacts caused by informal business enterprises due to their waste practices. This research aimed at assessing the waste management practices in the informal business sector in Olievenhoutbosch Township, Pretoria. Data collection was carried out between March 2016 and September 2016. The research utilised both qualitative and quantitative methods. The methodology employed techniques that included structured questionnaires, structured interviews and field observations. Semi- structured face to face interviews were carried out with key informants. These interviews provided information on the frequency of waste collection, available waste management awareness and challenges faced in delivering the service. The research also involved 230 field observations to study the pattern and frequency of waste collection and waste behaviours by informal business enterprises. Questionnaires were administered to 120 informal business enterprises with a response rate of 84.17%. Data from questionnaires and field observations indicated that waste generated by informal business enterprises (plastic bags, card board, packaging plastics, glass bottles and plastic bottles) was mainly recyclable waste. The most preferred disposal methods were use of refuse plastic bags (31%), open space dumping (20%) and burning (30%). Analysis of the results showed that there was lack of information on waste management and that also influenced waste behaviours. Preferences for waste disposal methods were influenced by many factors including lack of information, shortage of waste disposal facilities and waste collection frequency by the local town council. The research found that waste collection in various sections of the township was done once per week which has led to increased indiscriminate waste dumping and burning of waste. It was recommended that waste management information be provided to informal business enterprises especially on waste separation and recycling. The municipality should increase frequency of waste collection or provide central point waste facilities to business operators. / Environmental Sciences / M. Sc. (Environmental Science)