A novel methodology to select sustainable municipal solid waste management scenarios from three-way decisions perspective

The aim of this study was to use the life cycle assessment tool to assess, from an environmental point of view, the different possible municipal solid waste (MSW) management scenarios for the island of Mauritius. The scenarios include landfilling with energy recovery (S1), incineration with energy recovery (S2), composting, incineration and landfilling (S3) and finally composting, recycling, incineration and landfilling (S4). The MSW generated in 2010 was selected as the functional unit. Foreground data were collected through surveys and literature. Background data were obtained from ecoinvent data in SimaPro 8 libraries. The scenarios were compared both through the CML-IA baseline-midpoint method and the ReCiPe end-point method. From the midpoint method, the results obtained indicates that landfilling (S1) has the greatest impact in all the analyzed impact categories except ozone layer depletion and human toxicity, while incineration (S2) has the least impact on almost all the analyzed damage categories except in global warming potential and human toxicity. The collection and transportation of waste has a significant impact on the environment. From the end-point method, S4 reduces the damage impact categories on Human Health, Ecosystems and Resources due to the recycling process. S3 is not favorable due to the impact caused by the composting process. However, it is also very important to emphasize that for incineration, the best available technology with energy recovery shall be considered. It is recommended that S2 and S4 are considered for strategic planning.

Environmental assessment of municipal solid waste (MSW) management scenarios would help to select eco-friendly scenarios. In this study, the inventory data in support of life cycle assessment of different MSW are presented. The scenarios were defined as: anaerobic digestion (AD, Sc-0), landfilling combined with composting (Sc-1), incineration (Sc-2), incineration combined with composting (Sc-3), and AD combined with incineration (Sc-4). The current article contains flowcharts of the different scenarios. Additionally, six supplementary files including inventory data on the different scenarios, data on the different damage assessment categories, normalization, and single scores are presented (Supplementary files 1–6). The analysis of the different scenarios revealed that the most eco-friendly scenario to be implemented in the future would be the combination of AD and incineration (Sc-4).

Comparative life cycle assessment of different municipal solid waste management scenarios in Iran

The aim of this study is to determine the effect of the separation of solid waste at the source on three different sustainable solid waste management scenarios using the analytic hierarchy process. In this context, the type of source separation method that would be most appropriate for three solid waste management scenarios was investigated (A1: material recycling facility + sanitary landfill; A2: material recycling facility + biological processes + sanitary landfill, and A3: thermal processes + biological processes + sanitary landfill) based on well-known solid waste management alternatives. Firstly, solid waste management scenarios were determined as decision points. Secondly, three solid waste collection options at the source (mixed: there is only one type of bin for all solid waste components; binary: paper + metal + plastic + glass, kitchen organics, and others; and triple: paper + metal + plastic + glass, kitchen organics, and others) were chosen as the main criteria affecting the decision points. Thirdly, fifteen sub-criteria were chosen based on the main criteria. In the process, not only the main and sub-criteria, but also stakeholders’ contributions are vital. For the pairwise comparison of all the criteria to be used in the study, the opinions of thirteen experts as stakeholders were obtained through face-to-face interviews. Within the scope of the zero waste vision, with a focus on environmental protection, the analytical hierarchy process was applied via pairwise comparisons of decision points and factors affecting the decision points. According to the results, in the case of mixed collection at the source, high preference rates were obtained for A1 as the decision point in terms of environmental (0.665), economic (0.699), social (0.510), and technical (0.544) criteria. In the case of binary separation at the source, A1 has high preference rates as the decision point in terms of environmental (0.553), economic (0.673), social (0.507), and technical (0.632) criteria. In the case of triple separation at the source, it is calculated that the A1 alternative has the highest preference values as the decision point in terms of environmental (0.558), economic (0.669), social (0.514), and technical criteria (0.611). Hence, the determining factor in the efficient integration of sustainable waste management with smart technologies is how waste is managed at the source. It is hoped that the results obtained in this study within the scope of the zero waste vision will assist decision-makers during sustainable municipal solid waste management processes.

Chula model for sustainable municipal solid waste management in university canteens

This chapter proposes for the introduction of a recycling system in developing countries to enhance sustainable municipal solid waste (MSW) management. Poor infrastructures, coupled with inadequate resources and lack of funding, work against the optimization of a MSW disposal service. Authorities in charge of waste management need to change not only behaviors, but modernize their processes. Recycling technology is a key part of the solution. A model has been developed which suggest the involvement of stakeholders to achieve meaningful sustainable MSWM. This can be achieved by recognizing the role of the informal sector through community-based organizations, Non-Governmental Organizations (NGOs), and the private sector. The open dump approach is leading to severe environmental consequences as groundwater and soil is been contaminated. In this chapter, an integrated municipal solid waste management approach was developed with a model to help achieve sustainable municipal solid waste management. Resource recovery, not waste disposal, must be the ultimate goal with clearly defined end user markets so that the recovery loop is complete. Mandatory sorting of waste at household level would help greatly in making recycling activity successful.

Background: Human activities contribute to increased greenhouse gas concentrations, such as CO₂ and CH₄, which intensify the greenhouse effect and elevate Earth's temperature. TPS3R Flamboyan aims to reduce plastic waste through recycling, composting, and landfilling at TPA Cipeucang. While these processes help reduce waste, they can also produce CO₂ emissions. This study evaluates the CO₂ emissions from the baseline waste management scenario and compares it with an alternative scenario using the Waste Reduction Model (WARM) to assess GHG emissions and energy use. Methods: Data was collected in June 2020 from TPS3R Flamboyan and TPA Cipeucang in South Tangerang, analyzing waste types and GHG emissions using the WARM software. The study utilized baseline and alternative waste management scenarios to assess CO2 emissions and energy use, with input data on various waste types such as food waste and plastics. WARM compared the emissions and energy use for each scenario, providing insights on GHG reductions and energy efficiency in waste management practices. Findings: Total GHG emissions from baseline MSW generation and management (MTCO2E) is -2,23 and total GHG emissions from alternative MSW Generation ad management (MTCO2E) is -4,46. Total Energy use from baseline MSW Generation and Management (million BTU) is -33,98 and total Energy use from alternative MSW generation and Management (million BTU) is -92,22. Conclusion: Both scenarios indicate that the alternative scenario results in a higher reduction of emissions compared to the baseline management. This demonstrates the effectiveness of the alternative waste management practices in reducing greenhouse gas emissions. Novelty/Originality of this article: This research provides a novel approach by using the Waste Reduction Model (WARM) application, developed by the U.S. Environmental Protection Agency (EPA), to estimate greenhouse gas emissions and energy use in municipal solid waste management scenarios. This application offers high-level estimates for emissions reduction and energy efficiency, providing valuable insights for waste management practices.

Sustainable Municipal Solid Waste management has remained a big challenge in Africa and other resource constrained settings. However, to achieve sustainability, the gaps in governance of waste management need to be addressed speedily as populations are expanding rapidly, far exceeding available infrastructure and resources. Ruiru subcounty has a rapidly expanding population which has not been matched with sustainable waste management in commercial and residential sectors. This study sought to establish the influence of governance on Sustainable Municipal Solid Waste management in Ruiru Sub-County. Mixed methods research approach and descriptive research design were used in both data collection and analysis. This involved administration of Questionnaires, interviews and observation checklist through an online platform Kobo Collect. Results of the study showed that the County Government and subsequent sub-counties are responsible for waste management. Despites this mandate there are heaps of waste remain in commercial and residential areas. This is attributed to various governance challenges such as lack of prioritization of waste management, limited financial and human resources, minimal community participation, disregard of informal players in waste management cycle, weak implementation and enforcement of waste management policies. While it is desirable to attain sustainable solid waste management in Ruiru, and while the national legal frameworks are in place, there are major challenges and gaps in solid waste governance. Therefore, this study concludes enforceability of mechanisms, adequacy of funding, wholistic involvement of all players remain daunting. Unless these are addressed, sustainable waste management will only remain an unattainable goal.

Towards integrated, and sustainable municipal solid waste management system in Shashemane city administration, Ethiopia

Analysing municipal solid waste (MSW) management scenarios is relevant for planning future policies and actions toward a circular economy. Life cycle assessment (LCA) is appropriate for evaluating technologies of MSW treatment and their environmental impacts. However, in developing countries, advanced assessments are difficult to introduce due to the lack of technical knowledge, data and financial support. This research aims to assess the main potentialities of the introduction of waste-to-energy (WtE) systems in a developing Argentinean urban area considering the existing regulations about MSW recycling goals. The study was conducted with WRATE software and the proposed scenarios were current management, grate incineration of raw MSW and incineration of solid recovered fuel (SRF). In addition, a sensitivity analysis on the energy matrix was included. It was found that the production of SRF allows increasing the energy generation from waste by 200% and reducing the environmental impact of about 10% regarding the current MSW management system. Acidification Potential and Abiotic Depletion Potential were sensitive to changes in electricity mix. Results showed that if MSW reduction goals are achieved, changes in MSW composition will affect the performance of WtE plants and, in some cases, they will be not technically feasible. The outcomes of this study can be of interest for developing countries stakeholders and practitioners interested in LCA and sustainable MSW management.

Municipal solid waste management (MSWM) has been considered as a complicated multi-criteria decision-making problem for the uncertain context and related criteria. To select an optimal MSWM scenario, this paper provides a comprehensive MCDM framework for decision-makers under 2-dimensional uncertain linguistic (2-DUL) environment. Distinguished from traditional approaches, this framework not only guarantees the consistency of comparison matrix but improves effectiveness and efficiency in the decision process. Moreover, it accurately solves the cardinal and ordinal information of MSWM scenarios. Firstly, due to ambiguous and uncertain decision context, the 2-DUL set, characterized by I class of the linguistic evaluation information and II class of the reliability of the assessment results, is adopted to describe decision-makers' preference. An expectation reduced-dimension is developed to effectively handle 2-DUL set. Secondly, to guarantee consistency and reduce numerical pairwise comparisons, a best-worst-method (BWM)-based analytic network process (ANP) is utilized to form the local priority vectors of the main criteria and sub-criteria. Main criteria weights and sub-criteria weights are then obtained by aggregating all local priority vectors. Thirdly, an extended QUALIFLEX approach is employed to rank all alternative MSWM scenarios by comparing the weighted concordance/discordance index among overall possible permutations of all alternative scenarios. Finally, the developed framework is applied in a case study to determine an optimal MSWM scenario in Beijing. Additionally, a comparison analysis is complemented. The results demonstrate that the proposed framework is feasible, efficient, and superior in MSWM scenarios selection.

This paper presents a road map for sustainable Municipal Solid Waste Management (MSWM) in Lagos, using Scotland as a case study of best practice. Lagos status as an industrial and commercial hub of the Nigerian economy, complemented by its rapid population growth and urbanisation, has complicated the problem of achieving sustainable solid waste management, thereby making it a subject of concern in the literature. Various authors have expressed issues with the types of municipal solid waste generated, waste treatments, and barriers to sustainable municipal solid waste management in Lagos. The existing collection service inosho Lagos has been rated inefficient despite the weekly average evacuation exercise, as waste accumulation exceeded the existing storage and collection facilities, resulting in an unclean environment and significant environmental degradation. This study provides a view of waste management practices in Lagos and the lessons Lagos can learnt from Scotland in achieving sustainable municipal solid waste practice. A total of eight interviews were conducted with authorities and experts involved in municipal solid waste in both Lagos and Scotland to gather their experience and opinions in their respective regions and analyse them thematically. The findings from this research highlighted some initiatives directed towards promoting sustainable waste practices in both Lagos and Scotland. These empirical findings were used to propose a framework that could be used to achieve a circular economy in Lagos and identify areas for improvement in Scotland. This would promote the creation of more jobs and a subsequent reduction in carbon emissions and raw material importation in both regions. Future work should involve informer actors in interviews to get a broader view and increase the accuracy of the data collected on MSW practice in Lagos and provide analysis of strategies used and their impact to engage communities and promote behaviour change towards sustainable MSW management practice in Scotland. Keywords: Municipal Solid Waste, Management Practice, Lagos, Scotland. Proceedings Citation Format Olaniyi, T.K. & Ajayi, A.J. Jane (2023): A Road Map for Sustainable Municipal Solid Waste Management In Lagos: Using Scotland As A Case Study Of Best Practice.Proceedings of the 37th iSTEAMS Multidisciplinary Cross-Border Conference. 30th October – 1st November, 2023. Academic City University College, Accra, Ghana. Pp 43-56 dx.doi.org/10.22624/AIMS/ACCRACROSSBORDER2023V2P4

The present study moves beyond the traditional focus of municipal solid waste management (MSWM) of collection and disposal to sustainable MSWM that takes a systems view and addresses issues related to waste prevention, waste reduction, and waste segregation. The empirical study was conducted in large cities in North India that have a very high rate of solid waste generation. The study was conducted in two stages - in the first stage, an empirical study with two major stakeholders, the elected and government officials was conducted. In the second stage, interpretive structural modelling (ISM) is applied to evolve a hierarchy-based relationship among the enablers of sustainable MSWM. According to the results of empirical study, there are disagreements on several issues considered as strategic to implement a sustainable municipal solid waste management. Thus, there is a need to bring all the stakeholders agree on common policy issues of sustainable MSWM. Further, the ISM model shows that there exists a group of variables having a high driving power and low dependence requiring maximum attention and are of strategic importance.

This research proposes for the introduction of a recycling system in the Gambia to enhance sustainable municipal solid waste management. Poor infrastructures, coupled with inadequate resources and lack of funding, work against the optimization of a MSW disposal service. In the authors’ view, authorities in charge of waste management need to change not only behaviors, but modernize their processes. Recycling technology is a key part of the solution. A model has been developed which suggest the involvement of stakeholders to achieve meaningful sustainable MSWM. This can be achieved by recognizing the role of the informal sector through community-based organizations, Non-Governmental Organizations (NGOs), and the private sector. The open dump approach is leading to severe environmental consequences as the groundwater and soil within the dump is been contaminated. In this study, an integrated municipal solid waste management approach was developed with a model to help achieve sustainable municipal solid waste management. Resource recovery, not waste disposal, must be the ultimate goal with clearly defined end user markets so that the recovery loop is complete. Mandatory sorting of waste at household level would help greatly in making recycling activity successful.

Extended TODIM for multi-criteria group decision making based on unbalanced hesitant fuzzy linguistic term sets