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Faced with extraordinarily high unemployment, the long-term unemployed in South Africa increasingly have been securing livelihoods outside of standard waged work. Many are establishing unregistered, micro-enterprises that provide low-cost goods and services to low-income households. This paper presents the results of an exploratory study of unregistered (informal) second-hand tyre dealers in three South African cities to better assess their role in urban economies. Interviews with informal tyre dealers were conducted to understand how their businesses are positioned along the waste tyre value chain, their prospects for generating employment, and their potential to contribute to product reuse and repurposing. By extending the useful lives of tyres, informal dealerships can be analysed through a circular economy framework that acknowledges their varied environmental, economic, and social benefits. Concerns, however, are raised about the unregulated sale of second-hand tyres, some of which are unsafe and pose risks for road users. This in turn gives rise to difficult trade-offs between on the one hand the economic and environmental benefits of informal tyre sales and road safety on the other. [ABSTRACT FROM AUTHOR]

Understanding the connection between water supply and energy consumption in a circular economy is crucial for managing the demands of these resources. Sankey diagrams have the potential to enhance the visualisation of resource flows. However, there is a knowledge gap regarding the effective use of Sankey diagrams to capture the water-energy nexus and circularity of water. This study focused on effectively utilizing Sankey diagrams to model the nexus of water and energy flows and to assess the circularity of water. A comprehensive literature review was conducted on major studies on water material flows and modelling. This was supported by a review of approaches for modelling circularity, which have evolved from the material circularity index. The newly developed framework in this paper models water resource flows at all stages of the water supply chain, embedding the nexus as an interaction and considering resource intensity and material circularity index at each node. A city-level case study in South Africa was then used to apply the recommendations, model circularity, and the water-energy nexus using Sankey diagrams. In terms of circularity, the results indicate that water loss in the study area was very high, accounting for up to 40% of the total water supply and the water recycle rate was still very low, ranging from 3% to 7%. In terms of the nexus, the residential sector was found to have the highest energy intensity for water supply, primarily due to energy demand for water heating. Exploring the use of renewable or solar energy for water heating will be of interest and value. The new approach presented in this study allows for the simultaneous consideration of objectives, enabling a more robust analysis of energy-effective water use and water circularity along the water supply chain. [Display omitted] • A new framework for modelling the water energy nexus enriched by circularity options, energy intensity factors and confidence modelling. • Options for embedded circularity through the water supply chain. • The urgent challenge to address massive water loses in water supply systems for water scarce regions. • New Sankey diagrams showcasing how to model nexus and circularity. [ABSTRACT FROM AUTHOR]

The transition towards a circular economy is becoming a priority in many countries globally. However, the circular bioeconomy has received relatively less attention. In South Africa, the valorisation of organic waste is a priority area as demonstrated by national goals to divert organic waste from landfill. To support the growth of the organic waste value chain it is important to gain an understanding of the different value chain actors and their activities. Through a series of semi-structured interviews across the industry, this paper unpacks the organic waste value chain including the roles of different actors and the interlinkages amongst them. Interviewed actors were those involved in the waste treatment sector, including consultants, composters and technology providers and installers. The value chain is characterised by a number of partnerships, including sub-contracting and outsourcing, which enable value chain actors to offer services that they do not necessarily have the in-house skills or capacity to deliver on their own. The majority of actors were not directly engaged in activities related to the treatment of waste, with many of them engaging in support activities to facilitate the treatment of waste. This finding may be attributed to the fact that support activities have relatively lower barriers to entry. This has the potential to create a bottleneck, in which there will be limited capacity for waste treatment as new entrants opt for engaging in support activities. Greater investment is needed from both private and public sources in the waste treatment sector, including support for new entrants. This investment will help enable the country to meet its goals for organic waste diversion whilst contributing to job creation. [ABSTRACT FROM AUTHOR]

Electronic waste (e-waste) recycling presents an opportunity to reclaim materials trom a secondary resource and to create jobs and other economic opportunities. E-waste consists of various materials such as metals, plastics, glass, and other chemical substances. Some of these materials are hazardous if processed or disposed of improperly. Therefore, e-waste is classified as hazardous in South African law up until the hazardous components are removed. With the appropriate infrastructure and technology, a large portion of materials contained in e-waste can be reclaimed, and any adverse impacts of irresponsible management prevented. The private sector has played a proactive role in shaping the South African waste economy, and the government is taking strides to draw up enabling regulatory frameworks. Through a literature review and stakeholder engagements, this paper unpacks the organisation of the South African e-waste recycling industry. We consider whether the legal environment drives a common vision for a circular e-waste economy and probe the barriers to e-waste recycling across the value chain. The findings indicate that the development of the e-waste recycling sector in South Africa is dependent on a robust collection network and the enabling of local end-processing, refining, and manufacturing capacity. The availability and quality of input material and the development of local refining and manufacturing capacity are co-dependent and should be addressed simultaneously. [ABSTRACT FROM AUTHOR]