Location-Routing Optimization When Renting Social Vehicles in a Two-Stage E-Waste Recycling Network

E-waste recycling has been a hot topic in recent years. The low efficiency and high-operation cost of recycling make it more important to build perfect e-waste recycling networks. To hedge against the limitation of vehicle resources being often neglected in existing research, we propose a mixed integer linear programming model of e-waste recycling by renting idle social vehicles. In the model, both decisions made on the location selection of recycling sites and vehicle routings satisfying all of the demand nodes over the network within time windows are required to minimize the total operating cost. An improved genetic algorithm and heuristic algorithm are designed to solve the model, and numerical experiments are produced to demonstrate the effectiveness of the proposed model and algorithms.

Urban Informatics in Sustainable Waste Management: A Spatial Analysis of Korea’s Informal Recycling Networks

Large-scale informal recycling networks often emerge among developing economies in response to the challenges of modern urban waste accumulation. South Korea, despite its highly industrialized, developed economy, still maintains an extensive informal recycling sector made up of networks of local junk shops and individual waste pickers. As cities’ large data sources have become more widely available, the use of urban informatics in sustainable smart waste management has become more widespread. In this paper, we use geographic information system (GIS) analysis in order to uncover patterns within Korea’s informal recycling system, looking at the relationship between population demographics, waste levels, and urban planning with the prevalence of junk shops across Korea. We then interviewed junk shop owners, urban planning researchers, and government officials in order to better understand the factors that led to the coexistence of the country’s informal and formal systems of waste management and how junk shops have changed their operations over time in response to recent developments in cities’ urban fabrics. We conclude by giving suggestions for how the usage of urban informatics could increase the efficiency and sustainability of the country’s waste management systems, while also discussing the possible pitfalls of using such existing datasets for future policy decisions.

Constructed Governance as Solution to Conflicts in E-Waste Recycling Networks

Electronic waste (e-waste) has become an increasingly pressing problem worldwide because of the increase in the volume of waste, without a corresponding increase in the recycling rate. E-waste recycling models show a low percentage of reuse, at around 17.4% in the world, 11% in Latin America, and 3% in São Paulo City, Brazil. The sources of conflicts relating to e-waste recycling networks are diverse, including asymmetries of objectives, knowledge, ethical values, and culture of sustainability, which indicates the need for a system of regulatory mechanisms. The article’s main proposition is that constructed governance, which is a collective process involving many actors, could be an alternative to e-waste recycling management. The city of São Paulo was chosen to be analyzed. Using an abductive methodology, the data analysis shows a fragmented network, with conflicts of interest among commercial and sustainability objectives, an absence of legal knowledge, and increases in the incorrect disposal of waste. However, initiatives in small groups in Brazil, which can be considered as examples of constructed governance, show a better volume of waste and the transportation of waste material to the right destination. The authors argue that constructed governance could be an efficient tool for e-waste recycling management systems. Besides, the article offers a matrix of indicators that can be used by both researchers and recycling managers.

Inclusive recycling movements: a green deep democracy from below

This paper examines the multiple strategies articulated by grassroots recycler networks to bring about socioenvironmental change. The paper shows how these networks are an emblematic case of grassroots governmentality, whereby urban poor communities contribute to building more inclusive environmental regimes by developing technologies of power more typical of the powerful. These technologies include enumeration, with its resulting self-knowledge; the production of discourses and rationalities of social inclusion and environmental sustainability; and engagement in open and diverse alliances, at times with actors holding apparently antagonistic interests. The paper also reveals how recycling networks are a representative case of deep and green democracy. It is deep democracy, as grassroots networks strive to gain deep and true representativeness in their territories. It is green democracy, as it illustrates alternative pathways to environmental governance that is not limited to state and global organizations, but that also includes a range of control techniques emanating from the communities themselves.