Waste Management In South Africa Research Articles

Microplastic concentrations and risk assessment in water, sediment and invertebrates from Simon's Town, South Africa

Plastic pollution is an ever-increasing threat globally and poor waste management in South Africa has caused an increase in plastic leakage into the environment. Plastic waste in the environment are categorized according to size and plastic particles smaller than 5 mm in size are regarded as microplastics (MPs), and little to no research has been done on MPs pollution within the marine coastal environment and rocky shores in South Africa. Sampling was done in February 2020 at a rocky shore within Simon's Town Marina, Cape Town. MPs were extracted from collected water (n = 5), sediment (n = 5) and biota (n ≤ 30) samples. The extracted MPs were further classified based on shape, colour, size and an attenuated total reflectance Fourier-transform infrared (ATR-FTIR) instrument was utilized for polymer type identification The risks posed by MPs because of concentration at which they occurred and chemical composition were assessed in all the sample types. As expected, MPs were higher in sediment (38 ± 2 MP/kg) than in water (0.37 ± 0.06 MP/L) as the area has low water energy, allowing MP particles to settle within the sediment. Filter-feeding organisms had the lowest average MP particle concentrations (0.28 ± 0.04 MP/g) but displayed the highest variation of MP particle colours due to the non-selective feeding strategy, where other feeding strategies ingested mostly black/grey particles. The dominant MP size was between 100 μm and 500 μm in size for all samples combined, with the most abundant MP polymer type being nylon (27.27 %), polyethylene terephthalate (PET) (18.18 %) and natural MP particles such as cotton (18.18 %). The risk assessment indicated that polymer type poses a greater risk of MP pollution than MP concentrations.

Preparation and characterization of hexadecyl trimethyl ammonium bromide (HDTMA-Br)-modified cellulose nanocrystals (CNCs) derived from South African waste agricultural residue (Corncobs)

To address the challenges associated with waste management in South Africa, agro-waste products such as corncobs can be valorized into value-added materials like cellulose nanocrystals (CNCs), thus paving the way for the circular economy. This study investigated the extraction of CNCs from South African waste corncobs through mixed acid hydrolysis using a mixture of sulfuric acid and oxalic acid dihydrate in a mass ratio of 1:5. For the first time, CNCs obtained from South African waste corncobs were functionalized using hexadecyl trimethyl ammonium bromide (HDTMA-Br) to enhance their usability in a variety of applications. Characterization techniques such as: Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infra-red (FTIR) spectroscopy, X-ray Diffraction (XRD), and Thermogravimetric analysis (TGA), were used to examine the surface morphology, surface functional groups, crystallinity, and thermal degradation of the isolated and the functionalized CNCs, respectively. SEM images revealed that the waste corncobs were successfully pre-treated due to the fibrous structure and individual particles observed. The TEM image of the prepared CNCs showed needle-shaped nanoparticles with an average diameter of 40 ± 1.11 nm, 178.5 ± 2.3 nm long, and 20.8 ± 1.7 nm wide. According to the XRD pattern, a strong peak showed at2Θ = 22.4(degree) was considered for the determination of the crystallinity of raw cellulose and that of the CNCs. About 64.5% and 78.9% crystallinity were obtained from the raw cellulose and the extracted CNCs, respectively, with approximately 55.25% yield. FTIR spectra of the functionalized CNCs showed the attachment of new functional groups, methyl, and methylene groups, onto the fCNCs’ surface. Furthermore, TGA analysis indicated that functionalized CNCs were more thermally stable compared to non-functionalized CNCs. These findings showed successful isolation and modification of CNCs from South African waste corncobs for their prospective use in wide-ranging applications.

Application of the Analytic Hierarchy Process in selecting long-term storage option for spent nuclear fuel in South Africa

South Africa is one of the countries using nuclear power and has prospects to expand its use in the near future. The major issue with nuclear power generation is the management of spent nuclear fuel (SNF) which has become a challenge worldwide with South Africa also facing the same challenges.Radioactive waste management in South Africa is guided by a Radioactive Waste Management Policy and Strategy (RWMP&S) for the Republic of South Africa. In the Policy and Strategy, the government recognises that the practice of storing SNF in on-site storage pools is not sustainable and that regardless of any strategy chosen for the management of SNF, a long-term above-ground storage on an off-site facility is needed until a permanent solution is found.A number of options for dry storage systems are available from international vendors. The challenge is to select the most appropriate system for South Africa. The Analytic Hierarchy Process (AHP) is identified as a possible tool to aid the selection process. The study aims to demonstrate that the Analytic Hierarchy Process (AHP) is a tool that can be used to select a dry storage system option that will best meet South Africa’s needs.The study also presents the criteria to evaluate possible dry storage system options available in the international market. Pair-wise comparisons are conducted, and the ranking of the options is determined. Based on the results obtained from this study, it was demonstrated that the AHP tool can be applied to decide on the available option that will best meet South Africa’s needs.

Does Policy on Plastic Waste Support Higher Waste Management Hierarchy Options?

There is an urgent and growing need to further advance the plastic waste management system globally and in South Africa, due to the increasing impact of plastic waste. This study focused on the adequacy of plastic policies to sustainably manage plastic waste. Policies need to address the plastic material supply systems and the options up the waste hierarchy for them to be effective and support material circularity. The study used qualitative content analysis to assess how the evolution of plastic policies for plastic waste management in South Africa aligned with national plastic material flows and promoted options higher up the waste hierarchy. This was benchmarked with Norway and Germany, which have some of the highest plastic recycling rates. The results showed that the evolution of existing plastic policies for South Africa addresses stages of production, trade and consumption, and recycling. There is no focus on waste generation, collection and sorting. None aligned with the waste hierarchy options of rethink, reduce, reuse, repair, refurbish, remanufacture and repurpose. This policy gap supports the need for broader national plastic policy frameworks that embed a policy drive in the value chain points and promote the priority higher value measures of the waste hierarchy.

What Drives Households' Payment for Waste Disposal and Recycling Behaviours? Empirical Evidence from South Africa's General Household Survey.

Safeguarding the environment and its citizens’ health remains one of the key policy priorities of the governments of many developing and emerging countries. Using the 2017 General Household Survey (GHS) dataset, this study examines the driving factors affecting households’ recycling behaviour and payment for waste disposal in South Africa. The methods of data analysis were based on descriptive statistics and a Bivariate Probit regression model. The descriptive statistics results indicate that there are 56.29% male-headed and 43.71% female headed households, with an average age of 49 years. In addition, the study shows that 89.97% of household heads had formal education with a mean monthly income of 11,099.07 ZAR/650.504 USD. The study also revealed that 22% of the households sampled had access to social grants. The results from the Bivariate Probit regression model show that household’s income, access to social grants, formal educational attainment and the age of the household were significant (p < 0.01) driving factors affecting households’ recycling behaviour and payment for waste disposal. The study concludes that the households’ socio-economic factors affect their recycling behaviour and willingness to pay for waste management in South Africa. Actions targeted at poverty alleviation and environmental sensitization programmes are key for facilitating environmental conservation behaviours of households in South Africa in order to achieve the environmental sustainability Sustainable Development Goal (SDG) target of the United Nations.

Characterisation, Recovery and Recycling Potential of Solid Waste in a University of a Developing Economy

The present decade of Sustainable Development Goals has influenced higher educational institutions to assess and harness their great potential for waste diversion, recovery, and recycling. Institutional solid waste management in South Africa as a developing economy is yet to receive the required attention compared to developed countries. The measurement of the characteristics, and composition of solid waste is a fundamental pre-requisite towards creating a sustainable and viable process of solid waste management systems across institutions as this provides adequate and reliable information on the waste generated. This study aimed to determine the variations of waste components in the University of Venda (UNIVEN) by characterisation of the waste generated. Solid waste samples were collected from key activity areas and characterised using the ASTM D5321-92 method for unprocessed municipal solid waste. The recyclable, compostable, and non-recoverable components of the waste generated were found to be 61.7%, 34.4%, and 3.9%, respectively. The results of the waste audit revealed a strong potential for recycling in the institution (61.7%). This would decrease the amount of waste sent to landfills and enable the monetisation of the recyclable waste recovered from the waste stream, in this manner prompting a circular economy and a sustainable campus thereby lowering the waste footprint of higher education institutions.

A revised approach for estimating informally disposed domestic waste in rural versus urban South Africa and implications for waste management

A major limitation to improved waste management in South Africa lies in the paucity of reliable waste data and the exclusion of the contribution of the informal sector from reporting. Due to the disparity in the provision of formal waste management services across households in South Africa, omission of the quantified contribution of informal management practices leads to an inaccurate representation of waste management practices in existing waste data repositories. Given the potentially adverse social and environmental consequences of unregulated waste management practices, a lack of representation thereof has the potential to underestimate impacts. As of 2015, 31% of households are reported as lacking a basic refuse removal service; however, this number cannot necessarily be applied directly to waste quantities, given the regional and socio-economic differences that occur in per capita waste generation rates. The total quantity of domestic waste in South Africa and fraction disposed informally are estimated here, taking into account differences in waste generation rates based on income and settlement type. The characterisation and quantification of unregulated waste streams is beneficial in assessing the magnitude of the problem and, where necessary, identifying mitigation action. The results obtained show that 29% (3.67 million tonnes per annum) of domestic waste generated is not collected or treated via formal management options. Of this waste, the majority (85%) is generated in rural areas. The most common waste management option for unserviced households is a private dump. An estimated 94% of households in unserviced rural areas make use of private dumps, while in unserviced urban and metro areas this decreases to 74% and 71% of households, respectively. Illegal dumping is the next most common waste management option for unserviced areas. The proportion of household waste disposed of via illegal dumping ranges from an estimated 5% for unserviced rural households to 27% in metro areas with the balance made up by ‘other’ disposal/treatment options.&#x0D; &#x0D; Significance:&#x0D; &#x0D; The proportion of domestic waste that is mismanaged in South Africa is significant and its exclusion from national waste estimates leads to the inaccurate representation of waste management practices in existing waste data repositories. Unregulated waste management practices can have potentially adverse social and environmental consequences, i.e. leakage into the environment, or if burnt, the generation of atmospheric pollutants.&#x0D; The quantity of mismanaged waste and distribution of this waste between different management options is important for the development of improved National Waste Management Plans.&#x0D;

Municipal solid waste management in South Africa: from waste to energy recovery through waste-to-energy technologies in Johannesburg

ABSTRACT“Waste-to-energy” (WTE) technologies have been presented as one of the avenues to improve the management of solid waste whilst promoting clean and healthy urban environments through the recovery of waste and generation of energy. Research suggests that with the right investment in technologies and institutional changes, waste can potentially become a resource that can contribute to the socio-economic development of cities. It is in this context that this paper presents a review of the literature on WTE technologies and their implications on sustainable waste management in urban areas. The paper particularly contributes to our understanding of WTE technologies and its potential on Municipal Solid Waste Management (MSWM) in Johannesburg, South Africa. It is estimated that the city of Johannesburg’s landfills airspace will be completely depleted by year 2023. This projection becomes a motivation for the identification of suitable WTE alternative avenues to manage waste in the city. The paper argues that WTE technologies can contribute significantly to sustainable waste management, economic growth, ecological and environmental well-being.

A Review of Medical Waste Management in South Africa

Background:Poor medical waste management has been implicated in an increase in the number of epidemics and waste-related diseases in the past years. South Africa is resource-constrained in the management of medical waste.Objectives:A review of studies regarding medical waste management in South Africa in the past decade was undertaken to explore the practices of medical waste management and the challenges being faced by stakeholders.Method:Published articles, South African government documents, reports of hospital surveys, unpublished theses and dissertations were consulted, analysed and synthesised. The studies employed quantitative, qualitative and mixed research methods and documented comparable results from all provinces.Results:The absence of a national policy to guide the medical waste management practice in the provinces was identified as the principal problem. Poor practices were reported across the country from the point of medical waste generation to disposal, as well as non-enforcement of guidelines in the provinces where they exit. The authorized disposal sites nationally are currently unable to cope with the enormous amount of the medical waste being generated and illegal dumping of the waste in unapproved sites have been reported. The challenges range from lack of adequate facilities for temporary storage of waste to final disposal.Conclusion:These challenges must be addressed and the practices corrected to forestall the adverse effects of poorly managed medical waste on the country. There is a need to develop a medical waste policy to assist in the management of such waste.

Co-operatives as a development mechanism to support job creation and sustainable waste management in South Africa

South Africa, as with most African countries, is facing the reality of limited economic growth, high levels of poverty and increasing unemployment. At the same time, waste generation is growing, especially in urban centres across Africa, posing a great sustainability challenge. However, the waste sector can provide significant opportunities for improving livelihoods, generating jobs and developing enterprises, through the recovery of valuable recyclables. Co-operatives are recognised as a means of formalising the large number of informal waste pickers in developing countries. This paper attempts to identify the challenges facing waste and recycling co-operatives in South Africa. Results suggest that such co-operatives still face numerous challenges relating to infrastructure, operations, and capability. They still operate largely on the fringe of municipal solid waste management, and have not been integrated effectively into such formal collection systems, making it difficult for them to access sufficiently high volumes of recyclables. In addition, some co-operatives are operating as traditional businesses (e.g. following Pty Ltd business models) with the five co-operative members (minimum required membership for registering a co-operative) taking on management roles and instead employing staff to undertake the collection and sorting of recyclables. This is sometimes done through written contracts, but often it is through verbal contracts or no formal contracts at all. Many co-operatives appear to be opportunistic in their registration, targeting short-term co-operative grants and responding to procurement policies that support co-operative development, rather than aiming for long-term sustainability. With a reported 91.8% failure rate of waste recycling co-operatives in South Africa, and the return of many co-operative members back into the informal sector, this business model is not currently creating sustainable businesses or jobs. The results highlight three criteria which are considered crucial to creating a viable co-operative movement in the solid waste management sector in South Africa; access to materials, access to markets, and business development support.

GHG emission factors developed for the recycling and composting of municipal waste in South African municipalities

GHG (greenhouse gas) emission factors for waste management are increasingly used, but such factors are very scarce for developing countries. This paper shows how such factors have been developed for the recycling of glass, metals (Al and Fe), plastics and paper from municipal solid waste, as well as for the composting of garden refuse in South Africa. The emission factors developed for the different recyclables in the country show savings varying from −290kg CO2 e (glass) to −19111kg CO2 e (metals – Al) per tonne of recyclable. They also show that there is variability, with energy intensive materials like metals having higher GHG savings in South Africa as compared to other countries. This underlines the interrelation of the waste management system of a country/region with other systems, in particular with energy generation, which in South Africa, is heavily reliant on coal. This study also shows that composting of garden waste is a net GHG emitter, releasing 172 and 186kg CO2 e per tonne of wet garden waste for aerated dome composting and turned windrow composting, respectively. The paper concludes that these emission factors are facilitating GHG emissions modelling for waste management in South Africa and enabling local municipalities to identify best practice in this regard.

Economic instruments for solid waste management in South Africa: Opportunities and constraints

This paper presents results from a survey of waste management authorities aimed at identifying the opportunities and constraints associated with implementing economic instruments (EIs) for solid waste management (SWM) in South Africa (SA). Almost all respondents felt that EIs could lead to reduced waste generation and increased diversion of waste from landfill to recycling, and that they should eventually be implemented in the field of SWM in SA, although opinions varied as to the appropriate timeframe for implementation. The general consensus was that a number of fundamentals had to be in place first, including promulgation of the Waste Management Bill (which has since been promulgated as the Waste Act), political will, education and awareness, capacity and infrastructure development, cost recovery in waste management practices, and enforcement of existing instruments, such as the Minimum Requirements for landfill design and operation. Based on these and other issues raised by respondents, a number of recommendations are made for further research.

Veterinary waste disposal: Practice and policy in Durban, South Africa (2001–2003)

In South Africa, until recently, veterinary waste has not been included in definitions of health care waste, and so has been neglected as a contributor to the hazardous waste stream. Despite the application of, for example, the “Polluter Pays” principle in South African environmental legislation, to generators of waste, which would include veterinarians, there appears to be little awareness of and even less enforcement of the legislation in this regard. This paper reports on a 2001–2003 survey of management practices of the five waste contractors servicing just over half of the veterinarians in Durban, South Africa’s second largest city. Some of their activities, when evaluated in terms of the legislation, guidelines and policies relating to waste handling and disposal, were found to be non-compliant. Since any discussion on waste management should take cognisance of waste from generation to final disposal, the responsibility of veterinarians as waste generators is also discussed in the light of the recent developments in health care waste management in South Africa. This study presents a review of past and current policies, legislation and guidelines that have application to veterinary waste. This is the first study to address veterinary waste disposal in any South African city.

Waste Management Policy Implementation in South Africa: An emerging stakeholder participation paradox

The need to eliminate plastic shopping bags from South Africa’s environment has resulted in the formation and implementation of the Plastic Carrier Bags and Plastics Flat Bags Regulations (hereafter referred to as the Plastic Bags Regulations).The new law requires manufacturers to produce thicker, reusable and recyclable plastic shopping bags sold at purchase points.However, some major retailers have refused to charge customers for the new bags claiming that they were not party to the policy process. Consumer organisations have called for boycotts and urged shoppers to support retailers that continue issuing ‘free’ bags. Drawing theoretical insights from actor network theory (ANT) and other actor oriented and practice-based policy frameworks, this small-scale study established that the failure to consider key actors and actants in the policy implementation process, and the role of powerful actor networks in the process have adversly affected the policy implementation process. Given that South Africa placed emphasis on consultative national environmental policy process approaches, the unfolding events and emerging policy process models show an emerging stakeholder participation paradox in implementing policies on waste management in South Africa.