Financing mechanism for solid waste management in Anambra, Nigeria: analyses of emerging challenges and implication for circular economy.

Waste management is a critical public service provided by municipalities around the world. It is often problematic, inefficient, and abysmally performed in developing countries. Among the problems associated with waste management in these global locations is the issue of finance. Finance is required for both capital investment and operational costs. Methods of waste management financing differ from place to place due to cultural, political, and socio-economic peculiarities. Understanding these conditionalities is necessary to be able to proffer sustainable solutions. Despite these facts, there is limited comprehensive and relevant academic literature on waste management financing mechanisms in developing countries both in the past and recent times. This work addresses a significant gap in the literature by studying the mechanism for waste management financing in developing countries using Anambra State, Nigeria, as a case study. The current study further investigated the associated challenges and opportunities and made critical discussions on the implications on the circular economy. User fees and subsidies from the government are the major financing sources. The absence of cost-revenue model analysis, economic and institutional volatility, the unwillingness of the service users to pay fees, and lack of transparency are major challenges to the financial sustainability of waste management in the studied context. The creation of incentives for behavioral changes, adoption of neo-liberal policies, and formal integration of informal waste pickers are factors that can minimize the cost of waste management services while promoting a circular economy.

Reliability of stored river water as an alternative for consumption in Ekpoma, Nigeria: a human health risk assessment.

With looming global water-related issues, the monitoring of water quality for household and industrial consumption has become more pertinent. Rivers in nearby towns serve as primary water sources for Ekpoma town. 123 samples of stored river water were collected from 41 sampling locations and physical properties - pH, electrical conductivity (EC), salinity, temperature, and total dissolved solids (TDS) - were measured in situ using the Hanna edge® Multiparameter EC/TDS/Salinity Meter-HI2030. Atomic absorption spectrophotometry (AAS) was used to detect and measure the concentration of potentially toxic metals (PTMs): Al, Cr, Cu, Fe, Mn, Ni, Pb, and Zn. The measured concentrations were compared to the WHO, US EPA, and NSDWQ regulatory standards, and a spatiotemporal health risk analysis was performed using HERisk software. Twenty-five percent of the tested samples contained PTM concentrations within the allowable regulatory limits. Spatiotemporal health risk analysis showed that 98.8% of the cumulative carcinogenic risks (CRcum) were entirely from Pb contamination via oral ingestion. PTM concentrations in the samples suggest the degradation of river water quality due to agricultural activities, crude oil exploration activities, and soil composition in the region. Best management practices (BMPs) and treatment processes for the removal of detected contaminants are recommended to improve water quality.

Circular economy and frugal innovation: a conceptual nexus.

Frugal innovation (FI) and circular economy (CE) are two concepts that are recently being deliberated among researchers, policymakers, businesses, governments, and international organizations. Being a nascent development, both still lack an extant body of theories and data. Undisputedly they both share commonalities in gathering tractions among scholars. But the conceptual relationship between them has been unclear and hence makes it difficult to understand how one can promote the other. The current work constructs a conceptual framework through literature, explicating nexus, characteristics, and indicators of the two concepts and then exploring this framework through case analysis and focus group discussion (FGD). The results of our findings show that the two concepts are outcome of considerations on resource constraints and/or resource optimization; promote redesigning of product and services to minimize resources while achieving core functionality; involve the participation of stakeholders; and are implemented in stages. Most importantly, they foster the three pillars of sustainable development-social equity, economic prosperity, and environmental quality. However, supportive policies and institutions are largely associated with the development of CE which is not the same for FI in most countries. We conclude that FI being mainly operational in the emerging economies could serve as a veritable enabling tool for promoting the CE concept in the developing regions of the globe but will require the support of formal institutions and policies.

Co-production in solid waste management: analyses of emerging cases and implications for circular economy in Nigeria.

Co-production is a paradigm shift from the traditional model of public policymaking and service delivery that advocates for the involvement and participation of end-users of services as co-partaker in the process. In this paper, we examined the emerging models of co-production in solid waste management in Nigeria using a case study methodology. Four cases were purposefully selected for detailed exploration. The results of the analysis show that the involvement of the plurality of the non-state actors in waste management co-production brought in innovation through ICT, financial resources through grants, and increased public awareness. And have also given the service receivers a change of orientation that makes them perceive waste as a source of income rather than all rubbish needed to be discarded. However, possible exploitation of informal waste pickers, unclear business models, and absence of prior arrangement for coming together of both state and non-state actors in designing the service production are challenges to the emerging co-production cases. The current study further shows that the emerging co-production efforts have huge potential in promoting circular economy as it creates a better avenue for the implementation of extended producer responsibility (EPR), the establishment of eco-industrial parks, and safe integration of informal waste recyclers.

Natural leaf-type as food packaging material for traditional food in Nigeria: sustainability aspects and theoretical circular economy solutions.

Global call for healthy and sustainable food production and consumption has been loud, and the majority of these calls center on ensuring food security through sustainable agriculture. The other parts of the food supply chain such as consumption, packaging, recycling, and food waste management seem to be overlooked especially by developing nations of the world where attention is mainly placed on production. But in the broad sense, public health and environmental quality could be adversely impacted by neglect, mismanagement, or loophole on any of these food management systems. Hence, the current work studies the health and environmental impacts of local food packaging materials, adopting Nigeria as a proxy for the developing world. A review was first conducted to appraise the sustainability aspects of achieving and using natural leaves as a packaging material for traditional foods in Nigeria. The result of the review rightly shows that leaf-type packaging material has several apparent health and environmental advantages for food packaging. In view of this, the current work proposes a theoretical circular economy model that would ensure the constant and sustainable availability of these local packaging materials, especially in the urban centers.

Temporal assessment of municipal solid waste management in Nigeria: prospects for circular economy adoption.

This work reviewed the past and current status of municipal solid waste (MSW) management in Nigeria towards offering a direction for the future. The past status shows that poor policy regimes, inadequate financing mechanisms, absence of waste data, and abysmal institutional arrangement negatively impacted the MSW management outcomes in the country. At present, few improvements recorded like an increase in the number of landfills, and public-private partnerships have been largely undermined by the continuous upsurge in the urban population and lack of corresponding growth in critical capacities in terms of economic resources, technological advancement, and state-of-the-art urban infrastructures. The current waste generated in cities in Nigeria is calculated as 66,828 tonnes per day (TPD) at the total urban population of 106 million, while the projected value for 2040 will be 125,473 TPD at the urban population of 199 million. The current work further discusses prospects and implications for circular economy adoption in solid waste valorization in Nigeria.

Urban sanitation in Nigeria: the past, current and future status of access, policies and institutions.

Though rated among the largest economies in sub-Saharan Africa, Nigeria is currently grappling with enormous socio-economic challenges such as high poverty rate, power and water supply shortages, large-scale unemployment ratio, economic recession and underperforming agricultural sector. Judging by the scale of urgent political and economic importance, urban sanitation definitely ranks low among the government's priorities. No wonder political slogans and manifestos of political parties feature provision of water supply while sanitation is conspicuously usually omitted. This is suggestive of the opinion that having not critically understood the status, challenges and opportunities associated with sanitation in the country's urban areas might be partly responsible for this. Thus, the current work presents a detailed review of the past, current and future status of urban sanitation in Nigeria in terms of access coverage, policies, institutions and future challenges and opportunities. The past status was difficult to evaluate because of the absence of data and unclear definitions of the term 'sanitation'. The current status shows among other findings that water supply issues receive domineering attention than sanitation, mainly due to merging together of discussions, policies and implementation of the two issues together. In cases where sanitation crops up in the agenda, rural areas are favored more than the urban areas. This pattern is also common in the literature. But the future of urban sanitation in Nigeria is double-edged depending on actions or inactions of the government and other stakeholders. The study further makes recommendations for - balanced and sustainable urban development planning, restructuring of land and housing policies and creation of enabling market environment that could trigger a viable sanitation industry - as the way forward.