Towards sustainable waste management: A systematic PRISMA review of environmentally responsible landfill siting.

Rapid urban population growth and flourishing incomes have increased waste production in Dhaka city. A part of daily produced Municipal Solid Waste (MSW) is disposed of at Matuail sanitary landfill located within Jatrabari Thana, Dhaka. This study has analyzed the environmental impacts at and around this landfill using remote sensing techniques. The objective of this research is to develop a means of environmental monitoring at the landfill site and its surroundings through the implementation of various time-series remote sensing indices e.g., Land Surface Temperature (LST), Normalized Difference Vegetation Index (NDVI), Soil Adjusted Vegetation Index (SAVI), and Modified Soil Adjusted Vegetation Index (MSAVI). LST is used to observe the Spatio-temporal pattern of temperature distribution. NDVI, SAVI, and MSAVI are the Bio-indicators and they are helpful to analyze the vegetation health condition at and around the landfill area. From the result of LST, it is observed that the average temperature of the Jatrabarithana has increased from 23.12℃ in 1993 to an optimum temperature of 35.20℃ in 2013, then it went down to 29.09℃ in 2018. The NDVI result for the study period shows that the percentages of ‘Bare Soil’ and ‘Structural Object’ have increased drastically from 10% to 41.20% and 13.30% to 31.52% respectively for these 25 years in Jatrabarithana. On the other hand, the percentages of ‘Shrub and Grassland’ and ‘Moderate Vegetation’ have decreased from 54.20% to 25.15% and 12.55% to 0% respectively. SAVI and MSAVI also show evidence of increasing the amount of bare soil and structural object and decreasing the amount of vegetation. Due to the waste stabilization process, and inappropriate management system at the Matuail landfill, along with urbanization, industrial activity, and deforestation, a harmful effect has been done to the surrounding environment. As an outcome, the temperature has risen rapidly and the amount of vegetation has declined to a significant extent. Journal of Engineering Science 12(3), 2021, 127-138

Quantities of waste generation are drastically increasing every day, and most of the waste is disposed of through open dumps and landfilling. Methane, carbon dioxide, and nitrous oxide are major greenhouse gases (GHGs) produced from landfill sites. However, the global-warming potential of methane is 21 times higher than that of carbon dioxide. Hence, there is immense concern for its utilization from landfill sites. In developing countries, the composition of municipal solid waste (MSW) has high amounts of biodegradable waste (50–60%). This leads to higher emissions of GHGs a per ton of MSW compared to the developed world. In this study, the attempt will be made to estimate the amount of carbon stored in MSW burial in landfills. Tests were conducted in two different locations at the Mavallipura landfill. MSW samples were collected for every meter interval (1–2 m, 2–3 m and so on) up to 6 m. The result shows that carbon stored in organic matter increases with depth from approximately 2.2% at 1.0 m depth to 4.8% at 6 m depth. Based on MSW’s carbon storage factor and data on MSW generation, global carbon sequestration from MSW burial in the Mavallipura landfill is estimated to be at least 10 million metric tons per year. In additional, the study aims to quantify methane-gas production from the ward levels and the Mavallipura landfill site in India.

The potential of energy recovery from municipal solid waste in Kampala City, Uganda by incineration

Accurate estimation of emissions of greenhouse gases (GHGs) is required for making effective climate change mitigation policies at the national level. Among major sources, municipal solid waste (MSW) is an important source of GHGs, such as methane (CH4), generated during the anaerobic decomposition of organic matter. In Viet Nam, the emissions of GHGs are not well quantified, in particular from the MSW management system. In this study, we estimated emissions of GHGs from the MSW management system of Ho Chi Minh City (HCMC), considering the current waste management practices. In HCMC, landfilling has been a common practice of solid waste management. About 85 percent of the total MSW generated in the city has been landfilled at two landfill sites. Our estimates show that landfilling was the significant source of GHGs in HCMC, with a net contribution of 781.05 kg CO2-equivalent (CO2-eq.) per tonne of MSW landfilled. From the whole MSW management system, the direct GHG emission was 768.61 (kg CO2-eq. per tonne of MSW) with avoided emissions of 72.47 (kg CO2-eq. per tonne of MSW) through composting and recycling of MSW. The net GHG emission from the MSW management system was 696.14 kg CO2-eq. per tonne of MSW (≈1.665 million tonnes of CO2-eq. per year). The GHG emission data of this study may be useful to policymakers for making effective climate change mitigation policies.

Municipal solid waste (MSW) is considered as one of the significant sources of greenhouse gas (GHG) emission that contributes to global climate change. Waste sector is accountable for 5% of the global GHG emission, which consists of methane (CH4) and carbon dioxide (CO2) emission. At present, about 3 billion world urban population generate 1.3 billion tons of MSW per year at the rate of 1.2 kg per capita per day. By 2025, the urban population will likely increase to 4.3 billion and will generate 2.2 billion tons of MSW per year at the rate of about 1.42 kg per capita per day. Integrated solid waste management (ISWM) is a system that considers the prevention and recycling of wastes in most effective way for the protection of human health and environment. Under the ISWM, most appropriate and suitable waste management technologies are selected based on the evaluation of local needs and local environmental conditions towards reducing energy consumption, GHG emissions and carbon storage. Khulna is one of the topmost climate vulnerable coastal cities in the world. The area of Khulna City is 45.65 km2, where more than 1.5 million people live. About 520 tons of MSW is produced per day in Khulna City. Nearly 79% of the produced waste is organic in nature. The city has its own waste management system including door-to-door (DtD) waste collection and dumping into the ultimate disposal or landfill sites. The study estimates that the anaerobic digestion of organic waste and recycling together can reduce the emission of 19,588 tons CO2 equivalent and composting with recycling can reduce 22,838 tons CO2 equivalent per year in Khulna City. The paper highlights the existing solid waste management system in Khulna City with the prospect of ISWM system for climate mitigation of Khulna City.

Global knowledge base for municipal solid waste management: Framework development and application in waste generation prediction

Extraordinary population growth joined with commercial development, industrialization and rapid urbanization have led to the significant generation of municipal solid waste (MSW).Landfilling requires the lowest invest investment but it is the least favoured step in the integrated waste management order.The current effort was accomplished to measure the temporal variation of the leachate quality from the Okhla landfill site, operational since 1996 closed in 2022 and receiving approximately 2,000 tons of MSW daily in this period.Analysing leachate samples from 2018 to 2022 reveals significant temporal variations, Chemical Oxygen Demand (COD) levels consistently exceed 3,600 mg/L in pre-monsoon samples, decreasing to approximately 3,400 mg/L post-monsoon.Total Solids (TS) also decreased, indicating a dilution effect from rainfall.Notably, heavy metals, particularly lead, remain a concern, with concentrations persistently above 0.35 mg/L, highlighting ongoing contamination risks.The leachate, which lacks adequate treatment facilities, can migrate through nearby drainage systems, ultimately polluting the Yamuna River.This poses significant ecological risks, by impacting the water quality of River Yamuna.The findings emphasize the need for improved waste management practices and leachate treatment strategies to mitigate environmental risks and protect the Yamuna River's water quality and its aquatic life.

Proper management and treatment of municipal solid waste (MSW) plays a central role towards the reduction or elimination of uncontrolled disposal and the achievement of United Nations (UN) Sustainable Development Goals (SDGs) with the reduction of its vast adverse environmental and health impacts. Despite that, till now, there has never been a quantitative analysis of the progress in waste management infrastructure delivery worldwide. In this paper, we provide valuable insights regarding the progress in new MSW infrastructure delivery based on a dataset of 1764 projects from 156 countries, for the period 2014-2019. We also estimate the magnitude of uncontrolled waste disposal practices worldwide by estimating the gap between the current MSW infrastructure delivery and actual changes in MSW generation. Our results show that the new capacity delivered during the six years period amounted to 243 million metric tonnes (Mt) (40 million Mt per year), out of which 45% was delivered in high-income countries, 37.5% in the People's Republic of China and 17.5% in the rest of the world, mainly through thermal treatment (~57%) and landfilling (8%). The average allocated per capita budget of these projects during this period is about US$14, equivalent to US$2.33 (cap*year)-1. Our main conclusion is that the share of uncontrolled disposal will continue to rise at least until 2028, reaching almost 730 million Mt per year. Evidently, the global community continues to face a serious challenge towards the implementation of the UN SDG 12, target 12.4 by 2020. The analysis demonstrates that infrastructure delivery must increase by four folds to eliminate uncontrolled disposal practices.

13 - Sustainable management of municipal solid waste to fuel: an overview for a better tomorrow

Optimized landfill site selection for municipal solid waste by integrating GIS and multicriteria decision analysis (MCDA) technique, Hossana town, southern Ethiopia

This study compares the suitability of different satellite-based vegetation indices (VIs) for environmental hazard assessment of municipal solid waste (MSW) open dumps. The compared VIs, as bio-indicators of vegetation health, are normalized difference vegetation index (NDVI), soil adjusted vegetation index (SAVI), and modified soil adjusted vegetation index (MSAVI) that have been subject to spatio-temporal analysis. The comparison has been made based on three criteria: one is the exponential moving average (EMA) bias, second is the ease in visually finding the distance of VI curve flattening, and third is the radius of biohazardous zone in relation to the waste heap dumped at them. NDVI has been found to work well when MSW dumps are surrounded by continuous and dense vegetation, otherwise, MSAVI is a better option due to its ability for adjusting soil signals. The hierarchy of the goodness for least EMA bias is MSAVI> SAVI> NDVI with average bias values of 101 m, 203 m, and 270 m, respectively. Estimations using NDVI have been found unable to satisfy the direct relationship between waste heap and hazardous zone size and have given a false exaggeration of 374 m for relatively smaller dump as compared to the bigger one. The same false exaggeration for SAVI and MSAVI is measured to be 86 m and -14 m, respectively. So MSAVI is the only VI that has shown the true relation of waste heap and hazardous zone size. The best visualization of distance-dependent vegetation health away from the dumps is also provided by MSAVI.

The constant generation of Municipal Solid Waste (MSW) is a global concern in terms of quantity and its variety. The composition of MSW is influenced by the level of income; the season of the year; population; culture and lifestyle of people living in that community. Nigeria, in particular, is currently struggling with the menace of the upsurge in the quantity MSW in her major cities, but concern only with its collection, transportation, and disposal, however neglecting the prospect of material recovery from MSW for recycling. On this note, the study aimed to characterize MSW from identified dumpsites and at household level in Abuja Municipal Area Council (AMAC) and Bwari area council, Abuja, Nigeria towards a sustainable and efficient MSW management. The methodology used in this study was carried out in both wet and dry seasons, and each season entails; the use of American Standard Test Method [1] to determine the composition of unprocessed MSW at dumpsites 3 days in a week for 4 weeks and, the segregation of MSW into colored bags representing waste category at the household level was done for 2 weeks. The use of a stratified and random sampling method was employed to administer the questionnaires for data acquisition. The results show that the level of income played a significant role in the constituents of MSW generated at district level. In conclusion, food waste/organics and plastic waste are the predominant MSW categories in AMAC, and Bwari area council, Abuja, Nigeria. The characterization of MSW is essential for a long-term effect and sustainable solid waste management plans in order to design an appropriate and efficient waste management system for the society.

Machine learning based prediction for China's municipal solid waste under the shared socioeconomic pathways

Municipal Solid Waste Management in Ho Chi Minh City, Viet Nam, Current Practices and Future Recommendation

How to prevent spills of hazardous substances : By W. Unterberg, K.S. Roos, R.W. Melvold and P.A. Scofield, Noyes Data Corp., Park Ridge, NJ, 1988, ISBN 0-8155-1177-9, 185 pp., US $39.