The role of circular economy principles in solid waste management: a study of Walmer township
- Authors: Ndarane, Nomonde
- Date: 2022-04
- Subjects: Circular economy , Recycling (Waste, etc.)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/58048 , vital:58509
- Description: The maximisation of circular economy strategies brings hope to challenges of solid waste management and poverty alleviation. The purpose of the study was to explore the role of circular economy in solid waste management. A related goal was to enhance an understanding of how Walmer Township community’s use of circular economy principles can serve as a solid waste management strategy. The study holds the practical implication that circular economy contributes significantly to managing solid waste and to sustainable development. An empirical inquiry using a qualitative method was conducted and data was gathered through semi-structured interviews. Four different target groups were selected for this study- waste pickers, key informants (ward councillor and municipal officials), recycling businesses and NGO managers. It was brought to light that circular economy is utilised as both an economic and a solid waste management strategy. The findings show that implementing strategies of circular economy presents opportunities both for businesses and for poverty alleviation. Based on the findings, recommendations are made regarding making circular economy a lucrative business while upholding principles of environmentally friendly waste management strategies. Circular economy has crucial benefits, but it is practiced by few individuals within the community. More research needs to be conducted on how to make circular economy more attractive, especially to the youth. , Thesis (MA) -- Faculty of Business and Economic sciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Ndarane, Nomonde
- Date: 2022-04
- Subjects: Circular economy , Recycling (Waste, etc.)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/58048 , vital:58509
- Description: The maximisation of circular economy strategies brings hope to challenges of solid waste management and poverty alleviation. The purpose of the study was to explore the role of circular economy in solid waste management. A related goal was to enhance an understanding of how Walmer Township community’s use of circular economy principles can serve as a solid waste management strategy. The study holds the practical implication that circular economy contributes significantly to managing solid waste and to sustainable development. An empirical inquiry using a qualitative method was conducted and data was gathered through semi-structured interviews. Four different target groups were selected for this study- waste pickers, key informants (ward councillor and municipal officials), recycling businesses and NGO managers. It was brought to light that circular economy is utilised as both an economic and a solid waste management strategy. The findings show that implementing strategies of circular economy presents opportunities both for businesses and for poverty alleviation. Based on the findings, recommendations are made regarding making circular economy a lucrative business while upholding principles of environmentally friendly waste management strategies. Circular economy has crucial benefits, but it is practiced by few individuals within the community. More research needs to be conducted on how to make circular economy more attractive, especially to the youth. , Thesis (MA) -- Faculty of Business and Economic sciences, 2022
- Full Text:
- Date Issued: 2022-04
The integration of effluent treatment using constructed wetlands, with crop production and aquaculture
- Authors: de Jong, Martyn
- Date: 2019
- Subjects: Recycling (Waste, etc.) , Brewery waste , Sewage -- Purification , Beets , Mozambique tilapia
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/95767 , vital:31197
- Description: Breweries are major consumers of water and produce nutrient rich wastewater. Therefore, it is important to research technologies that optimise the reuse and recycling of this waste. This study compared different constructed wetlands (CWs) in terms of their potential for cleaning brewery effluent and simultaneously producing crops Beta vulgaris and fish Oreochromis mossambicus. Filling and draining times (FDT; 15 min, 30 min and 60 min) in tidal CWs were compared in Experiment 1. The 15 min FDT (6.52 ± 0.09 mg/l) and 30 min FDT (5.74 ± 0.09 mg/l) had higher dissolved oxygen (DO) than the 60 min FDT (5.40 ± 0.09 mg/l; p<0.05). This resulted in the 15 and 30 min FDT treatments reaching ammonia effluent discharge standards sooner than the 60 min FDT. Total plant harvest increased with increasing FDT; therefore, 15 min FDT was used as the FDT in tidal treatments in the following experiments. The aerated CW (5.81 ± 0.07 mg/l) and tidal CW (5.67 ± 0.07 mg/l) treatments had higher DO concentrations than the unaerated CW treatment (3.76 ± 0.07 mg/l; p<0.05) in Experiment 2. This resulted in lower ammonia concentrations on day 5 in the aerated and tidal CWs compared with the unaerated treatment (p<0.05). The tidal CW (23.97 ± 2.57 kg) had a total harvest that was approximately four times higher than the unaerated CW (p<0.05), which had the highest frequency of chlorosis and plant mortality; and was unable to treat ammonia to discharge standards. In Experiment 3, the aerated and tidal CW were compared with municipal-water as water sources for aquaculture. There were no differences in fish growth (p > 0.05). However, there were differences in water quality; with the municipal treatment having the lowest pH, EC and nitrate concentration (p<0.05); but all water quality parameters remained in a range suitably for fish production. Due to the tidal CW having the highest plant harvest and lowest frequency of chlorosis and mortality; it was the most suitable CW technology to clean the brewery effluent, and to produce B. vulgaris and water that could be used downstream in aquaculture.
- Full Text:
- Date Issued: 2019
- Authors: de Jong, Martyn
- Date: 2019
- Subjects: Recycling (Waste, etc.) , Brewery waste , Sewage -- Purification , Beets , Mozambique tilapia
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/95767 , vital:31197
- Description: Breweries are major consumers of water and produce nutrient rich wastewater. Therefore, it is important to research technologies that optimise the reuse and recycling of this waste. This study compared different constructed wetlands (CWs) in terms of their potential for cleaning brewery effluent and simultaneously producing crops Beta vulgaris and fish Oreochromis mossambicus. Filling and draining times (FDT; 15 min, 30 min and 60 min) in tidal CWs were compared in Experiment 1. The 15 min FDT (6.52 ± 0.09 mg/l) and 30 min FDT (5.74 ± 0.09 mg/l) had higher dissolved oxygen (DO) than the 60 min FDT (5.40 ± 0.09 mg/l; p<0.05). This resulted in the 15 and 30 min FDT treatments reaching ammonia effluent discharge standards sooner than the 60 min FDT. Total plant harvest increased with increasing FDT; therefore, 15 min FDT was used as the FDT in tidal treatments in the following experiments. The aerated CW (5.81 ± 0.07 mg/l) and tidal CW (5.67 ± 0.07 mg/l) treatments had higher DO concentrations than the unaerated CW treatment (3.76 ± 0.07 mg/l; p<0.05) in Experiment 2. This resulted in lower ammonia concentrations on day 5 in the aerated and tidal CWs compared with the unaerated treatment (p<0.05). The tidal CW (23.97 ± 2.57 kg) had a total harvest that was approximately four times higher than the unaerated CW (p<0.05), which had the highest frequency of chlorosis and plant mortality; and was unable to treat ammonia to discharge standards. In Experiment 3, the aerated and tidal CW were compared with municipal-water as water sources for aquaculture. There were no differences in fish growth (p > 0.05). However, there were differences in water quality; with the municipal treatment having the lowest pH, EC and nitrate concentration (p<0.05); but all water quality parameters remained in a range suitably for fish production. Due to the tidal CW having the highest plant harvest and lowest frequency of chlorosis and mortality; it was the most suitable CW technology to clean the brewery effluent, and to produce B. vulgaris and water that could be used downstream in aquaculture.
- Full Text:
- Date Issued: 2019
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