Environmental Science Industrial and Manufacturing Engineering

Municipal Solid Waste Management

Description

This cluster of papers focuses on the challenges and practices in solid waste management, particularly in developing countries. It covers topics such as municipal solid waste, recycling, landfill, life cycle assessment, renewable energy, waste-to-energy, environmental impact, and sustainability.

Keywords

Municipal Solid Waste; Waste Management; Developing Countries; Recycling; Landfill; Life Cycle Assessment; Renewable Energy; Waste-to-Energy; Environmental Impact; Sustainability

I Fundamentals1 Hazardous Waste2 The Legal Framework3 Process Fundamentals4 Fate and Transport of Contaminants5 ToxicologyII Current Management Practices6 Environmental Audits7 Pollution Prevention8 Facility Development and OperationsIII Treatment and Disposal Methods9 … I Fundamentals1 Hazardous Waste2 The Legal Framework3 Process Fundamentals4 Fate and Transport of Contaminants5 ToxicologyII Current Management Practices6 Environmental Audits7 Pollution Prevention8 Facility Development and OperationsIII Treatment and Disposal Methods9 Physicochemical Processes10 Biological Methods11 Stabilization and Solidification12 Thermal Methods13 Land DisposalIV Site Remediation14 Quantitative Risk Assessment15 Site and Subsurface Characterization16 Remedial Technologies17 Evaluation and Selection of Remedial Actions and Corrective MeasuresAppendixesA Basel ConventionB Contaminant PropertiesC Thermodynamic PropertiesD Conversion Factors
Laws and Regulations.Hazardous Waste Characteristics.Hazardous Waste Topics and Issues.Special Hazardous Wastes.Pollution Prevention and Recycling.Hazardous Waste Recovery Processes.Physical and Chemical Treatment.Thermal Processes.Biological Processes.Land Storage and Disposal.Remediation Cost Estimating.Remedial Action Techniques and … Laws and Regulations.Hazardous Waste Characteristics.Hazardous Waste Topics and Issues.Special Hazardous Wastes.Pollution Prevention and Recycling.Hazardous Waste Recovery Processes.Physical and Chemical Treatment.Thermal Processes.Biological Processes.Land Storage and Disposal.Remediation Cost Estimating.Remedial Action Techniques and Technology.Sampling and Analysis.Hazardous Waste Storage.Electronic Resources.
Reliable national data on waste generation and composition that will inform effective planning on waste management in Ghana is absent. To help obtain this data on a regional basis, selected … Reliable national data on waste generation and composition that will inform effective planning on waste management in Ghana is absent. To help obtain this data on a regional basis, selected households in each region were recruited to obtain data on rate of waste generation, physical composition of waste, sorting and separation efficiency and per capita of waste. Results show that rate of waste generation in Ghana was 0.47 kg/person/day, which translates into about 12,710 tons of waste per day per the current population of 27,043,093. Nationally, biodegradable waste (organics and papers) was 0.318 kg/person/day and non-biodegradable or recyclables (metals, glass, textiles, leather and rubbers) was 0.096 kg/person/day. Inert and miscellaneous waste was 0.055 kg/person/day. The average household waste generation rate among the metropolitan cities, except Tamale, was high, 0.72 kg/person/day. Metropolises generated higher waste (average 0.63 kg/person/day) than the municipalities (0.40 kg/person/day) and the least in the districts (0.28 kg/person/day) which are less developed. The waste generation rate also varied across geographical locations, the coastal and forest zones generated higher waste than the northern savanna zone. Waste composition was 61% organics, 14% plastics, 6% inert, 5% miscellaneous, 5% paper, 3% metals, 3% glass, 1% leather and rubber, and 1% textiles. However, organics and plastics, the two major fractions of the household waste varied considerably across the geographical areas. In the coastal zone, the organic waste fraction was highest but decreased through the forest zone towards the northern savanna. However, through the same zones towards the north, plastic waste rather increased in percentage fraction. Households did separate their waste effectively averaging 80%. However, in terms of separating into the bin marked biodegradables, 84% effectiveness was obtained whiles 76% effectiveness for sorting into the bin labeled other waste was achieved.
Municipal solid waste (MSW) is the abridgment of the waste generated from domestic, commercial, and construction activities by natural persons that is collected and treated by municipalities. Exponential growth of … Municipal solid waste (MSW) is the abridgment of the waste generated from domestic, commercial, and construction activities by natural persons that is collected and treated by municipalities. Exponential growth of population and urbanization, and the development of social economy, coupled with the improvement of living standard, have resulted in an increase in the amount of MSW generation throughout the world. On average the developed countries typically generate 521.95–759.2 kg per person per year (kpc) and 109.5–525.6 kpc typically by developing countries. Recent estimates suggest that the MSW generation globally exceeds 2 billion tons per year, which is a potential threat to environmental dilapidation. Therefore, MSW management (MSWM) seems to be one of the key topics for environmental protection in present days and also in the future. The authors have illustrated MSW generation and composition analysis and have provided a comprehensive review of MSWM in different countries throughout the world based on the available literatures. Some of the important aspects of waste management, such as composting, landfilling, and incineration, are illustrated.
Greenhouse gas (GHG) emissions from post-consumer waste and wastewater are a small contributor (about 3%) to total global anthropogenic GHG emissions. Emissions for 2004-2005 totalled 1.4 Gt CO2-eq year(-1) relative … Greenhouse gas (GHG) emissions from post-consumer waste and wastewater are a small contributor (about 3%) to total global anthropogenic GHG emissions. Emissions for 2004-2005 totalled 1.4 Gt CO2-eq year(-1) relative to total emissions from all sectors of 49 Gt CO2-eq year(-1) [including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and F-gases normalized according to their 100-year global warming potentials (GWP)]. The CH4 from landfills and wastewater collectively accounted for about 90% of waste sector emissions, or about 18% of global anthropogenic methane emissions (which were about 14% of the global total in 2004). Wastewater N2O and CO2 from the incineration of waste containing fossil carbon (plastics; synthetic textiles) are minor sources. Due to the wide range of mature technologies that can mitigate GHG emissions from waste and provide public health, environmental protection, and sustainable development co-benefits, existing waste management practices can provide effective mitigation of GHG emissions from this sector. Current mitigation technologies include landfill gas recovery, improved landfill practices, and engineered wastewater management. In addition, significant GHG generation is avoided through controlled composting, state-of-the-art incineration, and expanded sanitation coverage. Reduced waste generation and the exploitation of energy from waste (landfill gas, incineration, anaerobic digester biogas) produce an indirect reduction of GHG emissions through the conservation of raw materials, improved energy and resource efficiency, and fossil fuel avoidance. Flexible strategies and financial incentives can expand waste management options to achieve GHG mitigation goals; local technology decisions are influenced by a variety of factors such as waste quantity and characteristics, cost and financing issues, infrastructure requirements including available land area, collection and transport considerations, and regulatory constraints. Existing studies on mitigation potentials and costs for the waste sector tend to focus on landfill CH4 as the baseline. The commercial recovery of landfill CH4 as a source of renewable energy has been practised at full scale since 1975 and currently exceeds 105 Mt CO2-eq year(-1). Although landfill CH4 emissions from developed countries have been largely stabilized, emissions from developing countries are increasing as more controlled (anaerobic) landfilling practices are implemented; these emissions could be reduced by accelerating the introduction of engineered gas recovery, increasing rates of waste minimization and recycling, and implementing alternative waste management strategies provided they are affordable, effective, and sustainable. Aided by Kyoto mechanisms such as the Clean Development Mechanism (CDM) and Joint Implementation (JI), the total global economic mitigation potential for reducing waste sector emissions in 2030 is estimated to be > 1000 Mt CO2-eq (or 70% of estimated emissions) at costs below 100 US$ t(-1) CO2-eq year(-1). An estimated 20-30% of projected emissions for 2030 can be reduced at negative cost and 30-50% at costs < 20 US$ t(-) CO2-eq year(-1). As landfills produce CH4 for several decades, incineration and composting are complementary mitigation measures to landfill gas recovery in the short- to medium-term--at the present time, there are > 130 Mt waste year(-1) incinerated at more than 600 plants. Current uncertainties with respect to emissions and mitigation potentials could be reduced by more consistent national definitions, coordinated international data collection, standardized data analysis, field validation of models, and consistent application of life-cycle assessment tools inclusive of fossil fuel offsets.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHow Toxic Are Toxic Chemicals in Soil?Martin. AlexanderCite this: Environ. Sci. Technol. 1995, 29, 11, 2713–2717Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 … ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHow Toxic Are Toxic Chemicals in Soil?Martin. AlexanderCite this: Environ. Sci. Technol. 1995, 29, 11, 2713–2717Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/10.1021/es00011a003https://doi.org/10.1021/es00011a003research-articleACS PublicationsRequest reuse permissionsArticle Views1665Altmetric-Citations515LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
This paper uses the ‘lens’ of integrated and sustainable waste management (ISWM) to analyse the new data set compiled on 20 cities in six continents for the UN-Habitat flagship publication … This paper uses the ‘lens’ of integrated and sustainable waste management (ISWM) to analyse the new data set compiled on 20 cities in six continents for the UN-Habitat flagship publication Solid Waste Management in the World’s Cities. The comparative analysis looks first at waste generation rates and waste composition data. A process flow diagram is prepared for each city, as a powerful tool for representing the solid waste system as a whole in a comprehensive but concise way. Benchmark indicators are presented and compared for the three key physical components/drivers: public health and collection; environment and disposal; and resource recovery – and for three governance strategies required to deliver a well-functioning ISWM system: inclusivity; financial sustainability; and sound institutions and pro-active policies. Key insights include the variety and diversity of successful models – there is no ‘one size fits all’; the necessity of good, reliable data; the importance of focusing on governance as well as technology; and the need to build on the existing strengths of the city. An example of the latter is the critical role of the informal sector in the cities in many developing countries: it not only delivers recycling rates that are comparable with modern Western systems, but also saves the city authorities millions of dollars in avoided waste collection and disposal costs. This provides the opportunity for win–win solutions, so long as the related wider challenges can be addressed.
This paper presents data on the siting of solid waste facilities in one of the nation's fastest growing cities, Houston, Texas. The findings reveal that solid waste sites were not … This paper presents data on the siting of solid waste facilities in one of the nation's fastest growing cities, Houston, Texas. The findings reveal that solid waste sites were not randomly scattered over the Houston landscape but were likely to be found in predominantly black neighborhoods and near black schools. Institutionalized discrimination in the housing market, lack of zoning, and decisions by public officials over the past fifty years are major factors that have contributed to Houston's black neighborhoods becoming the “dumping ground” for the area's solid waste.
Municipal solid waste (MSW) reflects the culture that produces it and affects the health of the people and the environment surrounding it. Globally, people are discarding growing quantities of waste, … Municipal solid waste (MSW) reflects the culture that produces it and affects the health of the people and the environment surrounding it. Globally, people are discarding growing quantities of waste, and its composition is more complex than ever before, as plastic and electronic consumer products diffuse. Concurrently, the world is urbanizing at an unprecedented rate. These trends pose a challenge to cities, which are charged with managing waste in a socially and environmentally acceptable manner. Effective waste management strategies depend on local waste characteristics, which vary with cultural, climatic, and socioeconomic variables, and institutional capacity. Globally, waste governance is becoming regionalized and formalized. In industrialized nations, where citizens produce far more waste than do other citizens, waste tends to be managed formally at a municipal or regional scale. In less-industrialized nations, where citizens produce less waste, which is mostly biogenic, a combination of formal and informal actors manages waste. Many waste management policies, technologies, and behaviors provide a variety of environmental benefits, including climate change mitigation. Key waste management challenges include integrating the informal waste sector in developing cities, reducing consumption in industrialized cities, increasing and standardizing the collection and analysis of solid waste data, and effectively managing increasingly complex waste while protecting people and the environment.
In order to make a correct assessment of the state-of-the-art of the technology, a study was made on the development of digestion capacity for solid waste in Europe. The study … In order to make a correct assessment of the state-of-the-art of the technology, a study was made on the development of digestion capacity for solid waste in Europe. The study was limited to plants in operation or under construction that were treating at least 10% organic solid waste coming from market waste or municipal solid waste. A total treatment capacity for solid waste organics, excluding the tonnage used for sewage sludge and manures, evolved from 122,000 ton per year in 1990 to 1,037,000 ton available or under construction by the year 2000 in 53 plants across Europe, an increase by 750%. Both mesophilic and thermophilic technologies have been proven, with about 62% of capacity being operated at mesophilic temperatures. Wet and dry digestion are almost evenly split, while a clear choice was made for one-phase systems instead of two-phase systems, which represent only 10.6% of capacity. The capacity provided by co-digestion systems is limited, while there is a rising interest in digestion of mixed household waste. The reliable performance has been demonstrated for all types of anaerobic digestion systems. On the basis of the Dranco technology, a single-phase thermophilic dry digestion process, performances were reached similar to high-rate wastewater digestion. An annual average loading rate of 18.5 kg COD/m3.day, resulting in a biogas production of 9.2 m3/m3 reactor.day was obtained at a full-scale plant. The plant operated at a retention time of 15.3 days. Feedstocks range from clean organic wastes (31% dry matter) to heavily polluted grey waste organics (57% dry matter). Average dry matter concentrations of the digested residue of 41% were obtained.
The abysmal state of and challenges in municipal solid waste management (MSWM) in urban India is the motivation of the present study. Urbanization contributes enhanced municipal solid waste (MSW) generation … The abysmal state of and challenges in municipal solid waste management (MSWM) in urban India is the motivation of the present study. Urbanization contributes enhanced municipal solid waste (MSW) generation and unscientific handling of MSW degrades the urban environment and causes health hazards. In this paper, an attempt is made to evaluate the major parameters of MSWM, in addition to a comprehensive review of MSW generation, its characterization, collection, and treatment options as practiced in India. The current status of MSWM in Indian states and important cities of India is also reported. The essential conditions for harnessing optimal benefits from the possibilities for public private partnership and challenges thereof and unnoticeable role of rag-pickers are also discussed. The study concludes that installation of decentralized solid waste processing units in metropolitan cities/towns and development of formal recycling industry sector is the need of the hour in developing countries like India.
India faces major environmental challenges associated with waste generation and inadequate waste collection, transport, treatment and disposal. Current systems in India cannot cope with the volumes of waste generated by … India faces major environmental challenges associated with waste generation and inadequate waste collection, transport, treatment and disposal. Current systems in India cannot cope with the volumes of waste generated by an increasing urban population, and this impacts on the environment and public health. The challenges and barriers are significant, but so are the opportunities. This paper reports on an international seminar on 'Sustainable solid waste management for cities: opportunities in South Asian Association for Regional Cooperation (SAARC) countries' organized by the Council of Scientific and Industrial Research-National Environmental Engineering Research Institute and the Royal Society. A priority is to move from reliance on waste dumps that offer no environmental protection, to waste management systems that retain useful resources within the economy. Waste segregation at source and use of specialized waste processing facilities to separate recyclable materials has a key role. Disposal of residual waste after extraction of material resources needs engineered landfill sites and/or investment in waste-to-energy facilities. The potential for energy generation from landfill via methane extraction or thermal treatment is a major opportunity, but a key barrier is the shortage of qualified engineers and environmental professionals with the experience to deliver improved waste management systems in India.
The Global Waste Management Outlook is the first comprehensive, impartial and in-depth assessment of global waste management. It reflects the collective body of recent scientific knowledge, drawing on the work … The Global Waste Management Outlook is the first comprehensive, impartial and in-depth assessment of global waste management. It reflects the collective body of recent scientific knowledge, drawing on the work of leading experts and the vast body of research undertaken within and beyond the United Nations system. The six chapters inform the reader about trends, provide an analysis on governance and financial mechanisms, and offer policy advice on the way forward. The main document targeting professionals is accompanied by two summary documents, one for decision makers and the other for the public more broadly. This Global Waste Management Outlook offers a profound analysis of the enormous potential better waste management provides to assist in meeting the sustainability challenges ahead.
This paper proposes an overarching review of national municipal waste management systems and waste-to-energy as an important part of it in the context of circular economy in the selected countries … This paper proposes an overarching review of national municipal waste management systems and waste-to-energy as an important part of it in the context of circular economy in the selected countries in Europe. The growth of population and rising standards of living means that the consumption of goods and energy is increasing. On the one hand, consumption leads to an increase in the generation of waste. On the other hand, the correlation between increased wealth and increased energy consumption is very strong as well. Given that the average heating value of municipal solid waste (MSW) is approximately 10 MJ/kg, it seems logical to use waste as a source of energy. Traditionally, waste-to-energy (WtE) has been associated with incineration. Yet, the term is much broader, embracing various waste treatment processes generating energy (for instance, in the form of electricity and/or heat or producing a waste-derived fuel). Turning waste into energy can be one key to a circular economy enabling the value of products, materials, and resources to be maintained on the market for as long as possible, minimising waste and resource use. As the circular economy is at the top of the EU agenda, all Member States of the EU (including the EEA countries) should move away from the old-fashioned disposal of waste to a more intelligent waste treatment encompassing the circular economy approach in their waste policies. Therefore, the article examines how these EU policies are implemented in practice. Given that WtE traditionally is attached to the MSW management and organisation, the focus of this article is twofold. Firstly, it aims to identify the different practices of municipal waste management employed in selected countries and their approaches in embracing the circular economy and, secondly, the extent to which WtE technologies play any role in this context. The following countries, Estonia, Greece, Italy, Latvia, Lithuania, Norway, Poland, Slovenia, Spain, and the UK were chosen to depict a broad European context.
Disposal of solid wastes is a stinging and widespread problem in both urban and rural areas in many developed and developing countries. Municipal solid waste (MSW) collection and disposal is … Disposal of solid wastes is a stinging and widespread problem in both urban and rural areas in many developed and developing countries. Municipal solid waste (MSW) collection and disposal is one of the major problems of urban environment in most countries worldwide today. MSW management solutions must be financially sustainable, technically feasible, socially, legally acceptable and environmentally friendly. Solid waste management issue is the biggest challenge to the authorities of both small and large cities’. Valorization of food organic waste is one of the important current research areas. The conventional landfill, incineration, composting, and ways of handeling solid wastes are common as mature technologies for waste disposal. Traditionally, the most commonly used technologies for the treatment and valorization of the organic fraction of MSW are composting and anaerobic digestion (AD). The generation of organic solid waste (OSW); worldwide; is dramatically increasing each year. Most of the OSW’s are composed of agricultural waste, household food waste, human and animal wastes, etc. They are normally handled as animal feed, incinerated or disposed to landfill sites. OAW’s are comprised of materials rich in proteins, minerals, and sugars that could be used in other processes as substrates or raw materials.
Abstract Landfilling is one of the most common waste management methods employed in all countries alike, irrespective of their developmental status. The most commonly used types of landfills are (a) … Abstract Landfilling is one of the most common waste management methods employed in all countries alike, irrespective of their developmental status. The most commonly used types of landfills are (a) municipal solid waste landfill, (b) industrial waste landfill, and (c) hazardous waste landfill. There is, also, an emerging landfill type called “green waste landfill” that is, occasionally, being used. Most landfills, including those discussed in this review article, are controlled and engineered establishments, wherein the waste ought to abide with certain regulations regarding their quality and quantity. However, illegal and uncontrolled “landfills” (mostly known as open dumpsites) are, unfortunately, prevalent in many developing countries. Due to the widespread use of landfilling, even as of today, it is imperative to examine any environmental- and/or health-related issues that have emerged. The present study seeks to determine the environmental pollution and health effects associated with waste landfilling by adopting a desk review design. It is revealed that landfilling is associated with various environmental pollution problems, namely, (a) underground water pollution due to the leaching of organic, inorganic, and various other substances of concern (SoC) contained in the waste, (b) air pollution due to suspension of particles, (c) odor pollution from the deposition of municipal solid waste (MSW), and (d) even marine pollution from any potential run-offs. Furthermore, health impacts may occur through the pollution of the underground water and the emissions of gases, leading to carcinogenic and non-carcinogenic effects of the exposed population living in their vicinity. Graphical abstract
This study focuses on the management of plastic waste from households in Faranah. The objective is to establish an inventory of the management of plastic waste by households to allow … This study focuses on the management of plastic waste from households in Faranah. The objective is to establish an inventory of the management of plastic waste by households to allow stakeholders to have a synoptic picture of the situation in order to make decisions. Data collection was carried out on the basis of household surveys, interviews with stakeholders, direct observations and sampling.This results in potential air and water pollution, loss of biodiversity and constitutes a threat to human and animal health.
This Study aims to explore Waste Management Strategies in the European Union with examples of waste management implementation in Netherlands. In this study, a multydisciplinnary approach was carried out where … This Study aims to explore Waste Management Strategies in the European Union with examples of waste management implementation in Netherlands. In this study, a multydisciplinnary approach was carried out where waste management would be linked to the commitment of Dutch political parties in carring out regional cooperation related to waste management. EU member states agreed to cooperated on the Waste Prevention Programme (WPP). This study used qualitative methode with data sources from documents published by European Union and The Dutch government. In this Study, the concept of waste management was used. The findings of this study show that waste management in The European Union and its member states is carried out as an effort to achieve the sustainable Development Goals (SDGs). The results show that producers of goods produced in the European Union and their distributors are responsible for the abundance of waste from these products. Basic mechanisms of waste management in Europe, ranging from waste sorting, the use of renewable technology in waste management, and increasing recycling capacity. The conclusion that can be drawn from this study is the importance of waste management strategies for the European Union and its member states. In regional studies, social issues related to the environment such as waste management in Europe can be the subject of in-dept research that can be explored with a multidisciplinary approach and viewed from political perspective.
Exposure due to chemical toxicants emanating from landfill leachates is considered among major global concerns. This study aims to critically review the impact of selected non-threshold heavy metals mainly lead, … Exposure due to chemical toxicants emanating from landfill leachates is considered among major global concerns. This study aims to critically review the impact of selected non-threshold heavy metals mainly lead, cadmium, arsenic, mercury, and chromium. The study also reviews their effects on groundwater and surface water resources. It also reviews their effects on fauna and flora ecosystems. Health burdens from air pollutants and odours emitted by landfills/leachates on human populations are discussed. In addition, greenhouse gas (GHG) emissions associated with leachates/landfills and emerging sustainable mitigation measures are summarised. Among these heavy metals, lead consistently contaminates surface water and groundwater, while mercury levels often fall below World Health Organisation guidelines. Studies show DNA damage in aquatic fauna and growth inhibition in flora due to pollutant exposure. Common air pollutants from landfills include particulate matter, hydrogen sulfide, and airborne bacteria/fungi, linked to respiratory issues, cancer risks, and cellular disruptions in humans. Methane is the predominant GHG emitted from landfills. While nature-based solutions effectively remove organic matter and major cations/anions, their efficacy in heavy metal removal remains limited. Further research, including source apportionment and epidemiological studies, is needed to understand the public health and climate change impacts of landfills/leachates as sources of environmental pollution.
This review thoroughly evaluates gasification as a transformative alternative to conventional methods for managing municipal solid waste (MSW), highlighting its potential to convert carbonaceous materials into syngas for energy and … This review thoroughly evaluates gasification as a transformative alternative to conventional methods for managing municipal solid waste (MSW), highlighting its potential to convert carbonaceous materials into syngas for energy and chemical synthesis. A comparative evaluation of more than 350 papers and documents demonstrated that gasification is superior to incineration and pyrolysis, resulting in lower harmful emissions and improved energy efficiency, which aligns with sustainability goals. Key operational findings indicate that adjusting the temperature to 800–900 °C leads to the consumption of CO2 and the production of CO via the Boudouard reaction. Air gasification produces syngas yields of up to 76.99 wt% at 703 °C, while oxygen gasification demonstrates a carbon conversion efficiency of 80.2%. Steam and CO2 gasification prove to be effective for producing H2 and CO, respectively. Catalysts, especially nickel-based ones, are effective in reducing tar and enhancing syngas quality. Innovative approaches, such as co-gasification, plasma and solar-assisted gasification, chemical looping, and integration with carbon capture, artificial intelligence (AI), and the Internet of Things (IoT), show promise in improving process performance and reducing technical and economic hurdles. The review identifies research gaps in catalyst development, feedstock variability, and system integration, emphasizing the need for integrated research, policy, and investment to fully realize the potential of gasification in the clean energy transition and sustainable MSW management.
Objective: The objective of this study is to investigate the steps taken by a waste collection company in Brazil to implement the requirements of the new regulatory standard NR 38, … Objective: The objective of this study is to investigate the steps taken by a waste collection company in Brazil to implement the requirements of the new regulatory standard NR 38, aiming to identify the main challenges faced and solutions applied. Theoretical Framework: Regulatory standard nº 38 defines solid waste as any material, substance, object or good discarded in solid or semi-solid states resulting from human activities in society. Brazil currently has approximately 351 thousand urban cleaning workers distributed in most of the established municipalities, producing around 77.1 million tons of waste, corresponding to more than 211 thousand tons of waste generated per day, approximately 380 kg/inhabitant/year. According to data from the labor inspection department of the Ministry of Labor and Social Security, an average of 10 thousand work accidents occur annually, resulting in approximately 36 deaths per year. Method: The methodology adopted in this research was designed to understand the dynamics and work practices within an urban solid waste collection company that operates in a capital city located in northeastern Brazil. Focusing on household collectors, the approach used was predominantly descriptive and field-based and divided into three phases: unstructured interviews, documentary research, and visits to the work site. Results and Discussion: The results obtained revealed that the most frequent accidents were: contact with sharp objects, being run over, falls, contact with biological risks, and musculoskeletal disorders. The main legal changes were: speed limits for collection vehicles in work areas, prohibition of transporting collectors on the platform, rear-view cameras, safety footwear with specific characteristics, transport of collectors, keeping an updated record of all the places where the activities are carried out, communication channels, and access to fresh drinking water. Research Implications: The practical and theoretical implications of this research are discussed, providing insights into how the results can be applied or influence practices in the field of occupational accident prevention in urban solid waste collection services. Originality/Value: This study contributes to the literature by identifying and recording challenges encountered and proposing solutions for implementing the new occupational safety recommendations contained in regulatory legislation no. 38. The relevance and value of this research are evidenced by field investigations and documentary analysis in an urban waste collection company, allowing real findings of difficulties and solutions.
Susi Agustina Wilujeng | INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS
Accurate estimation of municipal solid waste (MSW) generation is critical for effective urban waste management planning and infrastructure optimization. However, many community-based waste management facilities, such as Siaga Municipal Recovery … Accurate estimation of municipal solid waste (MSW) generation is critical for effective urban waste management planning and infrastructure optimization. However, many community-based waste management facilities, such as Siaga Municipal Recovery Facility (MRF) in South Jakarta, face challenges in direct waste quantification due to the common absence of weighbridge systems, leading to a gap in precise data for operational and strategic decision-making. This study addresses this gap by developing and applying a simple linear regression modelling approach to estimate MSW generation. The model utilizes readily available volume data collected from various types of solid waste transport units operating at Siaga MRF. A dataset comprising 46 observational data points, including actual solid waste weight and corresponding volume measurements, was collected over several operational days. The regression model was developed and validated using a data mining approach with Python, employing the Scikit-Learn and Pandas libraries to identify the statistical relationship between conveyance volume (input) and waste weight (output). The linear regression model yielded an R-squared (R²) value of 0.562, indicating a moderate but practically useful level of predictive accuracy in explaining the variance in waste weight based on volume. The Mean Squared Error (MSE) was 0.0125, further supporting the model's reliability for estimation purposes in this context. These findings demonstrate that simple linear regression can serve as a feasible, low-cost, and valuable tool for estimating waste generation where direct weighing infrastructure is unavailable. The results are intended to assist policymakers, facility operators, and urban planners in enhancing capacity planning, improving daily operational forecasting, and guiding future investments in waste management technologies. Furthermore, this study reinforces the importance of applying quantitative, data-driven approaches to promote evidence-based environmental management and operational efficiency at the community scale.
This study aims to evaluate the existing solid waste collection and management system available to households in Pakistan and to explore the factors affecting households' cash payments for waste collection … This study aims to evaluate the existing solid waste collection and management system available to households in Pakistan and to explore the factors affecting households' cash payments for waste collection and disposal services. Robust least square regression is applied to household-level data from 16,155 households in the Pakistan Social Living Measurement Survey (PSLM) for 2019-2020. This method was chosen for its ability to handle outliers and provide more reliable estimates. On average, households pay PKR 214 (USD 1.01) per month for waste collection and disposal services. Households in Baluchistan and Khyber Pakhtunkhwa pay the highest amounts, while those in Sindh and Punjab pay less. Rural households pay more than urban households. Waste collection is primarily handled by private vans/carts, with doorstep collection being the most common method. The municipality's role in waste collection at the doorstep is limited. Public bins and waste collection points are accessible to 83 percent of households, but their distant locations and infrequent emptying pose significant problems. These limitations highlight the need for improved municipal involvement and infrastructure. Results indicate that household income, education of the household head, age of the household head, gender of the household head, number of earners in the household, doorstep waste collection via private van/cart, availability of bins or waste collection points, distance from waste disposal facilities, bin or waste collection point clearance duration, house ownership, dwelling type, and number of rooms significantly affect households' cash payments for waste collection services. To increase cash payments for waste collection services, waste management authorities should provide better and modern solid waste management systems. Upgrading existing systems can enhance households' willingness to pay for these services.
The waste problem in Indonesia is a complex and evolving environmental issue, particularly in areas with high population density and economic activity. This study aims to cluster regions affected by … The waste problem in Indonesia is a complex and evolving environmental issue, particularly in areas with high population density and economic activity. This study aims to cluster regions affected by waste issues using the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm. DBSCAN was chosen for its ability to identify spatial patterns and detect outliers without requiring a predefined number of clusters. The data used includes spatial and non-spatial information related to waste volume and regional characteristics across various provinces in Indonesia. The results show that DBSCAN effectively groups waste-affected areas into several clusters based on data density and spatial proximity. These clusters can serve as a foundation for determining policy priorities for regional and national waste management. This research is expected to contribute to the development of more targeted and data-driven waste management strategies.
An Enhanced Landfill Mining (ELFM) process, which could convert waste to materials (WtM), was proposed and established for the multi-component recycling of a landfill case. Life Cycle Assessment (LCA) method … An Enhanced Landfill Mining (ELFM) process, which could convert waste to materials (WtM), was proposed and established for the multi-component recycling of a landfill case. Life Cycle Assessment (LCA) method was used to evaluate the whole life cycle of WtM, and environmental impact was compared with waste-to-energy (WtE) strategy. It was found that WtE strategy could improve primary energy demand. However, the global warming potential (GWP), acidification potential (AP) and ecotoxicity (ET) of the WtM strategy are significantly improved, with the potential values of 328 KgCO2eq, 3.29 KgSO2eq and 0.69 CTUe. The WtM strategy realizes multiple recycling of the remaining waste, and promotes the coordination of pollution reduction and carbon reduction. In addition, the sensitivity analysis of the WtM strategy showed that the GWP and PED were sensitive to the changes of the combined sorting rate, the recovery rate of recyclables and the utilization rate of recyclables.Implications Statement: In Our manuscript, an Enhanced Landfill Mining (ELFM) process, which could convert waste to materials (WtM), was proposed and established for the multi-component recycling of a landfill case. Life Cycle Assessment (LCA) method was used to evaluate the whole life cycle of WtM, and environmental impact was compared with waste-to-energy (WtE) strategy. It was found that WtE strategy could improve primary energy demand. However, the global warming potential (GWP), acidification potential (AP) and ecotoxicity (ET) of the WtM strategy are significantly improved, with the potential values of 328 KgCO2eq, 3.29 KgSO2eq and 0.69 CTUe. The WtM strategy realizes multiple recycling of the remaining waste, and promotes the coordination of pollution reduction and carbon reduction. In addition, the sensitivity analysis of the WtM strategy showed that the GWP and PED were sensitive to the changes of the combined sorting rate, the recovery rate of recyclables and the utilization rate of recyclables.
This was a study conducted to find out the perception of households towards circular economy driven waste management system.This also considered the various behavioural dynamics that plays in shaping the … This was a study conducted to find out the perception of households towards circular economy driven waste management system.This also considered the various behavioural dynamics that plays in shaping the perception.
This study explores the critical interrelationship between soil chemistry and effective waste management practices in Haryana. The state faces severe challenges related to the management of municipal and industrial waste … This study explores the critical interrelationship between soil chemistry and effective waste management practices in Haryana. The state faces severe challenges related to the management of municipal and industrial waste as urbanization and industrial activities accelerate leading to significant soil contamination. The study highlights the improper waste disposal practices that result in elevated concentrations of heavy metals, persistent organic pollutants, and other hazardous substances that alter key soil properties such as pH, electrical conductivity, and organic carbon content. The implications of these changes threaten soil fertility, disrupt microbial activity, and increase the risk of bioaccumulation, thereby jeopardizing agricultural sustainability and groundwater quality. The study emphasizes the importance of understanding soil chemistry in assessing contamination risks and developing sustainable waste management strategies. The study discusses about how soil components interact with contaminants by examining the behavior, transformation, and mobility of pollutants within soil ecosystems that influences their availability in soil and potential harm to human health and the environment. The study has highlighted the gaps in waste management infrastructure, particularly in leachate control and hazardous waste regulation, while also assessing advanced remediation strategies such as chemical stabilization, bioremediation, and phytoremediation. Sustainable soil recovery requires integrated approaches combining regulatory enforcement, periodic monitoring and adaptive remediation methods. The study emphasizes the need for scientific waste management policies to mitigate soil degradation, protect agricultural productivity, and ensure long-term ecological resilience in Haryana.
M Parimala | INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT
Rapid urbanization and population growth have significantly increased the volume of waste generated daily, putting immense pressure on traditional waste management systems. Inefficient collection processes, overflowing bins, and lack of … Rapid urbanization and population growth have significantly increased the volume of waste generated daily, putting immense pressure on traditional waste management systems. Inefficient collection processes, overflowing bins, and lack of timely monitoring contribute to environmental pollution and health hazards. To address these challenges, this paper presents a Smart Waste Management System utilizing Internet of Things (IoT) technology to automate and optimize the waste collection process. The system employs sensor-equipped garbage bins, primarily using ultrasonic sensors, to detect the fill level of each bin. These sensors send real-time data to a centralized cloud server through wireless communication modules. The collected data is analysed to determine optimal collection times and routes, thereby reducing fuel consumption, operational costs, and unnecessary trips by waste collection vehicles. Additionally, a mobile and web-based application interface is developed for both municipal staff and users to monitor bin status, receive alerts, and manage collection schedules efficiently. The system ensures timely waste disposal, prevents bin overflow, and contributes to a cleaner, healthier environment. Integration of GPS tracking and route planning enhances decision-making and resource allocation. This IoT-based approach not only streamlines the overall waste management workflow but also supports the vision of smart, sustainable cities. The proposed system demonstrates high scalability, cost- effectiveness, and the potential for real-world deployment in urban and semi-urban areas. keywords—Smart Waste Management, Internet of Things (IoT), Real-Time Monitoring, Ultrasonic Sensors, Cloud Computing, Route Optimization, Environmental Sustainability.
Water bodies in Bayelsa state are affected by pollution, which makes them unfit to drink and seriously disturbs aquatic life and ecosystems. This study examined physicochemical parameters and health risk … Water bodies in Bayelsa state are affected by pollution, which makes them unfit to drink and seriously disturbs aquatic life and ecosystems. This study examined physicochemical parameters and health risk assessment of heavy metals in the drinking water sources in Odi and Kaiama of Kolokuma/Opokuma Local Government Area (KOLGA) of Bayelsa State, Nigeria. Four (4) water samples were obtained from underground (borehole), River, Agbayai Lake, and dugwell. The samples were analysed using standard laboratory methods. The possible harmful health effects of exposure to heavy metals content in the water samples were also estimated using reliable tools of health risk assessment indices. The physicochemical parameters showed that the range values of pH, temperature, total dissolved solids, dissolved oxygen, biological oxygen demand, chloride, sulphate, nitrate, and phosphate were within the standards of the United States Environmental Protection Agency (USEPA), Nigerian Industrial Standard (NIS), and WHO permissible limits (P&lt;0.05). Compared to lead detected in underground (0.023 mg/mL) and dug-well (0.033 mg/mL) water and iron detected in River water (0.738 mg/mL), which were above the permissible limits, cadmium, chromium, zinc, copper, and manganese were below the allowable limit. The health risk assessment results showed that children are more vulnerable to health risks. The average exposure dose through ingestion (LADDing) for all the metals in the water samples was above the acceptable limit, while the dermal exposure dose (LADDderm) for all the metals revealed in the water samples was within the USEPA acceptable range of 1x10-6 to 1x10-4 . The oral and dermal accumulativecarcinogenic risk (Rtotal) values for Cd, Cr, and Pb highlighted long-term risks. From the present study, it is important to track the exposure levels and consistently revise risk assessments to ensure the safety of water resources in the Niger Delta environment and to protect the health of the population.
Despite existing laws, poor waste management persists as a significant problem. This study examined the influence of attitudes toward waste management, social norms, and perceived behavioral control on the adoption … Despite existing laws, poor waste management persists as a significant problem. This study examined the influence of attitudes toward waste management, social norms, and perceived behavioral control on the adoption of waste management practices. Using a descriptive-correlational design involving 300 respondents selected through simple random sampling, the results showed that the predictor variables were significant factors, accounting for 19.8% of the influence on the criterion variable. Further research may be conducted to investigate the remaining 80.2% variance in the criterion variable. To contribute to the realization of Sustainable Development Goals (SDGs) 11 and 12, a public awareness campaign on effective waste management is also strongly recommended. Keywords: Influence of Attitudes, Social Norms, Perceived Behavioral Control, Waste Management Implementation
This study explored the Impacts of Waste Management Practices on Environment and Social Well-being in Secondary Schools with a focus on selected schools in Musanze District. The study aimed to … This study explored the Impacts of Waste Management Practices on Environment and Social Well-being in Secondary Schools with a focus on selected schools in Musanze District. The study aimed to examine the types of waste generated in secondary schools, assess the methods used to manage this waste, analyze the environmental and social impacts resulting from these practices and identify the challenges faced by secondary schools in implementing effective waste management practices. A mixed-methods approach and tools were used, combining a survey with questionnaires, interviews, and focus group discussions with students, teachers, administrators and local authorities. The findings revealed that the most common types of waste generated include paper, plastic, food remains, and sanitary waste. Regarding management methods, the study found that most schools rely on basic practices such as open burning and dumping, with limited segregation, recycling, or proper disposal systems in place. On environmental impacts, it was observed that poor waste handling contributes to pollution, unpleasant odours, and blockage of drainage systems, negatively affecting the school environment and surrounding communities. In terms of social well-being, the study found that improper waste management exposes students and staff to health risks, reduces school cleanliness, and contributes to absenteeism, especially among female students due to poor sanitary disposal. The challenges to effective waste management practices include lack of awareness and education on waste management among students, inadequate waste disposal facilities and low involvement of stakeholders in waste management. The study concludes that waste management practices in secondary schools are inadequate and contribute significantly to environmental degradation and social challenges. It recommends increased awareness, training on proper waste handling, provision of bins, and stronger involvement of school administrators and local authorities to improve overall waste management and enhance both environmental and social well-being in schools.
Abstract Catha edulis (Khat) waste (KW) is one of the challenging waste managements in Ethiopian urban areas. While biochar from other biomass sources has been studied, the effect of pyrolysis … Abstract Catha edulis (Khat) waste (KW) is one of the challenging waste managements in Ethiopian urban areas. While biochar from other biomass sources has been studied, the effect of pyrolysis conditions on Catha edulis waste-based biochar yield and quality remains unexplored. Therefore, this study aims to optimize the biochar production process from Catha edulis waste for high yield and desirable characteristics. The KW and biochar were characterized using FTIR, BET, proximate analysis and other key parameters. The results indicated that KW possesses favorable properties for thermochemical conversion, with low ash content (4.35% wt. dry basis) and significant organic constituents (46.89% cellulose, 28.53% lignin, 19.62% hemicellulose, 4.96% extractives). The effect of pyrolysis process variables embracing reaction temperature, reaction time, and particle size on biochar yield and quality was optimized using response surface methodology (RSM) coupled with central composite design (CCD). The biochar was desirably characterized by a pH of 8.96, fixed carbon of 60.08%, ash content of 10.55%, and a yield of 45.12% at the optimum production processes of 390 °C, 44 min, and 0.7 mm particle size. Moreover, the study found that pyrolysis temperature was the most influential factor across all responses (yield and quality). Consequently, the biochar (yield and quality) was significantly (p &lt; 0.05) influenced by pyrolysis temperature. In conclusion, the study inferred that KW holds substantial potential for biochar production with remarkable soil amendment characteristics. Graphical Abstract
Denisa Gibovic , Andrea Bikfalvi | Waste Management & Research The Journal for a Sustainable Circular Economy
Social innovation in waste management has gained momentum as a pivotal approach to address environmental sustainability challenges. RECICLOS, a pioneering project centred on augmenting public awareness and incentivising recycling behaviour, … Social innovation in waste management has gained momentum as a pivotal approach to address environmental sustainability challenges. RECICLOS, a pioneering project centred on augmenting public awareness and incentivising recycling behaviour, stands as an example of social innovation within the waste management domain. This article investigates the scalability potential of RECICLOS and its implications for widespread adoption and impact. It employs a multi-dimensional analysis to evaluate the scalability of the project, synthesising information from diverse sources, various demographics and geographical locations. The research framework takes on an interdisciplinary lens, integrating insights from sociology, environmental science, technology adoption and policy analysis. The findings underscore the pivotal role of RECICLOS as a scalable model for social innovation in waste management. Crucially, it illuminates key factors contributing to its scalability, including the efficacy of behavioural nudges, the design and implementation of incentivisation mechanisms, technological integration and community engagement strategies. Moreover, this article examines the transferability and adaptability of RECICLOS to different socio-cultural contexts, emphasising the project’s potential for global applicability. Insights gleaned from this analysis contribute to a nuanced understanding of how social innovation initiatives like RECICLOS can transcend local boundaries and evolve into scalable solutions with far-reaching impacts on waste management practices. This research serves as a foundational framework for policymakers, environmentalists and practitioners seeking to replicate, expand or adapt similar social innovation initiatives for sustainable waste management on a broader scale.
Introduction The landfills may have notable ecological impacts on the surrounding environment, yet little is known about the microbial community and nutrient conditions in surrounding soil. Methods Using high-throughput sequencing … Introduction The landfills may have notable ecological impacts on the surrounding environment, yet little is known about the microbial community and nutrient conditions in surrounding soil. Methods Using high-throughput sequencing technology, we analyzed the spatio-temporal distribution of bacterial and fungal communities in soils surrounding a large-scale landfill. The component of landfill waste and twelve soil properties were detected, including four nutritional indices and eight heavy metal elements. Results and discussion Our results revealed landfill-specific enrichment of bacterial genera Pseudomonas (0.13–6.43%), Marmoricola (0.12–4.82%), Sphingomonas (0.64–5.24%), and Nocardioides (0.51–6.3%) and fungal genera Alternaria (0.23–12.85%), Pyrenochaetopsis (0.028–10.12%) and Fusarium (0.24–4.07%). Their relative abundances exhibited significant variations across landfill age gradients and soil depth profiles ( p ≤ 0.05). Random forest and structural equal models (SEM) confirmed the direct correlation between soil TOC, heavy metals including Cu, Cd and Pb and microbial diversity. While soil heavy metals mainly exhibited negative effects on microbial diversity, dominant microbial taxa such as Lysobacter, Nocardioides, Pseudopithomyces , and Chaetomium showed potential tolerance to heavy metal stress in soil around the landfill. In soil around the landfill, higher concentrations of total nitrogen (TN), available phosphorus (AP) and available potassium (AK) were observed in the upper layers near the aged landfill areas, whereas higher concentration of total organic carbon (TOC) were detected around fresh landfill area. The distribution of microbial taxa and predicted functional profiles were strongly associated with the nutrients availability. The findings revealed that landfill activities influenced the structure and function of microbial community, contributing to the complex spatio-temporal distribution of nutrients in the surrounding soil.
This study evaluated the implementation of Republic Act 9003 (R.A. 9003), also known as the Ecological Solid Waste Management Act, in Barangay Gen. T. de Leon, Valenzuela City, Philippines. The … This study evaluated the implementation of Republic Act 9003 (R.A. 9003), also known as the Ecological Solid Waste Management Act, in Barangay Gen. T. de Leon, Valenzuela City, Philippines. The researchers used a mixed-methods approach, combining surveys and interviews to collect both quantitative and qualitative data. Surveys were conducted with 398 residents aged 17 to 65, and interviews were held with five residents and two members of the Barangay Solid Waste Management Committee. This study aimed to evaluate the effectiveness of the Solid Waste Management Program in the barangay, with a focus on waste segregation, recycling, garbage collection, implementation, and public awareness. The study also aimed to understand residents' views and reactions to the program and its impact on effective governance in the barangay. Findings revealed that while residents demonstrated awareness of the program and engaged in activities such as waste segregation and recycling, there were areas that needed improvement. Waste collection was generally rated as very effective; however, there was a recognized need for enhanced information dissemination, especially regarding waste reduction and recycling. The study concluded that cooperation between barangay committees and citizens is vital for the success and sustainability of solid waste management programs. It also emphasized the government's responsibility in addressing health issues related to waste, such as dengue and cholera. Recommendations included the need for continuous information campaigns, the implementation of policies with penalties for non-compliance, and the establishment of Material Recovery Facilities in each barangay. Keywords : Solid Waste Management, RA 9003, Implementation, Public Awareness