Tons Of Municipal Solid Waste Research Articles

Characterization and projection of dry season municipal solid waste for energy production in Ilorin metropolis, Nigeria.

This research investigates the quantity of municipal solid waste produced during the dry season, and its characterization at Eyenkorin dumpsite of Ilorin metropolis, along the Lagos-Ilorin express way. The physicochemical and thermal compositions of the combustible fractions of municipal solid waste were analysed, to ascertain the available calorific value. In this research, the quantity (tonnes) of waste generated, the rate of generation (kg per capita per day), its sustainability and the likely energy and power potentials in the dry season, were essentially predicted. The population responsible for municipal solid waste generation during this study was 1,120,834 people. During the characterization study from November 2018 to February 2019, it was established that 203,831 tonnes of municipal solid waste was produced during the four months of the dry season, at the rate of 1.12 kg per capita per day. It was found that 280 tonnes/day of municipal solid waste with low heating value of 19 MJ kg-1, would generate 1478 MWh of heat energy and 18 MW of electrical energy potentials discretely, and grid of 13 kW.

Estimation of Methane Production and Electrical Energy Generation from Municipal Solid Waste Disposal Sites in Pakistan

This work aimed to estimate the annual methane production from the municipal solid waste disposal sites in Pakistan. In this study, the Intergovernmental Panel on Climate Change (IPCC) default methodology was used to estimate theoretical methane formation potential of the waste disposal sites in major cities of Pakistan. The estimates of this study are based on the last population census conducted in the year 2017 and latest available data regarding the waste generation and management practices in the cities considered in the study. Results showed that 31.18 million tonnes of municipal solid waste (MSW) is generated annually. The top 10 major populated cities in Pakistan (with 20% share in country’s population) contributing 31% share in the total quantity of MSW generated in overall country. On average 50–60% of the MSW generated is collected and openly dumped at the designated waste disposal sites. After analyzing the data, we estimate that annually 12.8 MtCO2-eq of methane is emitted from the waste disposal sites in major cities considered in this study. The methane produced from the waste disposal sites can be sustainably utilized as a source of energy through transforming MSW disposal sites (open dumps) to sanitary landfills with methane capturing and utilization facilities. In the present scenario of waste management and methane formation potential, sanitary landfills would generate 62.35 MWh of electric power if 25% of the methane was recovered and utilized in power generation.

Assessing solid waste as ‘green energy economy’ in Indiausing renewable energy technologies for sustainable development

During latest time, solid waste production and controlling are main issuesforall worldnations. yet, the conversion technologies are using to createdifferent byproducts like light, heat energy, fertilizer and biogas etc. Energy is animportantmatter for world. Energygain couldshow a factorfor minimization the effect ofurbanWaste onthe atmosphere withmore advantage to provide anenergy source. The waste disposal is morechallenge and highest dependent on liquid fuel has impelled world to continue efforts in forwarding energy formation technologyensuring suitablechanges on one side and energy flexibility on the other side.In India waste generation rate per person is 0.3 - 0.6 kgs/day, which is estimated to increase at 1.33% annually. As per estimates, about 275000 tons of Municipal Solid Waste (MSW) is generated per day and this figure could be twice as much by 2030. Estimation exist a power for producingapprox. 1500 MW energy from the municipal solid waste in India and this potential is likely to increase further with economic development. The power production from the specified MSW-RDF gasifier and systemmaximization for energy production from fuel with increased ability to promote extremely minimizing the costing of energy use.The opportunity of power production in the effective manner of better and mass composition of solid wastecurrent WTE practices and research trends in India well as world, with anaerobic digestion (AD), gasification, heat-based biofuel combined heat and power (CHP) production, and incineration with the definedapproaching of Indian WTE application.

Prediction of methane emission from landfills using machine learning models

AbstractModeling the methane emission is challenging due to the heterogeneity of solid waste characteristics and different chemical and physical reactions leading to methane generation. This study focused on monitoring the methane generation from landfills and modeling methane emission using machine learning techniques. Hence, two pilot landfills were constructed with a total capacity of 9327 tons of municipal solid waste. The temperature, methane, and leachate generation from the pilot landfills were measured for 3 years. The effect of leachate recirculation system on methane emission from landfill was evaluated, and the results showed that the methane emission was 35% lower when leachate recirculation system was not utilized in the landfilling process. Three machine learning models, including artificial neural networks, adaptive neuro‐fuzzy inference system, and support vector machine, were used for the first time to predict methane generation. Results demonstrated that the support vector machine model was superior to both the adaptive neuro‐fuzzy inference system and artificial neural network models for predicting methane generation. The support vector machine model was able to capture 90% and 82% of the variation in methane emission from landfills with and without leachate recirculation, respectively. In general, machine learning models showed considerable potential for forecasting methane generation.

Life cycle cost analysis of municipal solid waste management scenarios for Mumbai, India

This study quantifies and compares the cost of municipal solid waste (MSW) management systems under different scenarios using life cycle cost (LCC) analysis approach. LCC analysis was performed for six integrated MSW management scenarios for Mumbai city, India which generates over 9000 metric tonnes of MSW daily and disposes most of it in open dumps. The scenarios are the combinations of recycling, composting, anaerobic digestion, incineration with electricity generation, and landfill with biogas recovery. To perform LCC analysis of scenarios, present worth method was used. The present worth of operations and maintenance (O&M) cost and revenue generated was estimated using a discount rate of 11.25% for a 20-year life span. Results show that the incineration based scenario is the most cost-intensive option with a net LCC of US$38 per tonne of MSW due to the high capital cost involved in case of incineration. While the scenario with a combination of recycling and sanitary landfill was the most economically viable option with a net LCC of US$19 per tonne of MSW due to comparative lower operating cost. The sensitivity analysis shows that the O&M cost was the most sensitive parameter and a change of ±10% and ±20% in O&M cost, the net LCC of scenarios changes in the range of 14–33% and 29–65%, respectively. This study provides an economic comparison of MSW treatment scenarios from a life cycle perspective, which facilitates the decision-making process for improvement in cost estimation and planning of waste management strategies in India.

Feasibility Study of Municipal Solid Waste Management System (MSW-MS) in Sidoarjo District

Sidoarjo MSW-MS currently facing a problem to fulfill their needs of Municipal Solid Waste (MSW) processing, as the data shown by Dinas Lingkungan Hidup dan Kebersihan (DLHK) of Sidoarjo district stated that their service cover only 48% of Sidoarjo total area with the amount of potentially unmanaged MSW per day reach about 83% of it or equal to 1032 ton of MSW per day. In regards to this condition, there is a need to determine a new integrated approach of MSW-MS so that MSW in Sidoarjo district can be more properly managed to reduce its potential implied expense, gain potential benefits from it, and prevent potential negative impacts from improperly managed MSW. In this research, the implementation of proposed integrated MSW-MS will be carried out by a private business entity in collaboration with DLHK of Sidoarjo district in a Public Private Partnership (PPP) scheme represented in form of Business Plan Scenario (BPS). This research focused on determining the best BPS to be implemented in Sidoarjo district which targeted to optimize implied benefits from Sidoarjo District regional government perspective as its priority but still considering BPS feasibility to be implemented by related private business. This process is done by making a financial model according to the proposed BPS that are complemented with linear regression-based for its waste generation input variable and Benefit-Cost Analysis (BCA). Feasibility for each BPS implementation for private business entity perspective determined according to its financial valuation parameters value and Benefit Cost Ratio (BCR) for DLHK of Sidoarjo district perspective. Furthermore, an adjustment of several private business parameters is made according to sensitivity and incremental analysis approach to ensure the feasibility of its implementation in terms of private business entity perspective.

Sufficiency Economy Philosophy: An Enabler for Zero Waste City

Waste has become a critical problem in cities around the world. Each year, the world generates 2.01 billion tonnes of municipal solid waste, with at least 33 percent of that not managed in an environmentally safe manner. The currently consumption-driven lifestyle also produces a huge volume of waste each day threatening the world sustainability. Moreover, the ongoing depletion of natural finite resources is also leading the globe to an uncertain future. The purpose of this article is to study the zero-waste concept and the characteristics of zero waste city, to study the principles of sufficiency economy philosophy, and to review the role of sufficiency economy in waste reduction and how it contributes to zero waste city. Documentary study and literature review were used for data collection. The result showed that ineffective waste management including landfill and incineration can be one major cause of waste. Also, overconsumption can be another cause that exacerbates the current waste situation. A zero-waste strategy and the concept of zero waste city can contribute to waste prevention with its proactive-reduce, reuse, and recycle (3R)-principle and to the reduction of wastes sent to landfills and incinerators. Sufficiency Economy Philosophy can also contribute to waste reduction at the consumer side. With the zero-waste strategy and sufficiency economy philosophy, we can achieve waste and pollution reduction and preserve our environment, as well as create sustainability for the future generations.

An investigation of wood pallets landfilled and recovered at US municipal solid waste facilities

The purpose of this research was to investigate the total number of pallets that end up in landfills in the United States as well as to gain a better understanding of the overall waste stream. This research was conducted by mailing all of the licensed Municipal Solid Waste (MSW) facilities in the continental United States a questionnaire that included the option to complete the survey online. The questionnaire that was sent to the landfills was built upon previous surveys conducted by researchers at Virginia Tech in both 1995 and 1998. The results indicated that an estimated 249 million tons of MSW was received at landfills nationwide. This was an increase from the 239 million tons of MSW in 1998. Only 13.1 million pallets were landfilled in 2016, which was over a 90% decrease from the 138 million pallets landfilled in 1998. At the same time, approximately 15.9 million pallets were recovered, repurposed, or reused at the surveyed MSW facilities, which was a decrease from the 22 million pallets recovered in 1998. The results of this research indicate that fewer pallets are making their way to landfills, and a greater proportion of pallets reaching MSW facilities are being recovered.

Greenhouse gas emissions from semi-aerobic bioreactor landfills with different vent-pipe diameters.

The emission patterns of three greenhouse gasses (GHGs), viz. CH4, CO2, and N2O from landfills, were examined on a lab scale. Three simulated semi-aerobic bioreactor landfills (SABL1, SABL2, SABL3), with respective vent-pipe inner diameters (φ) of 25, 50, and 75mm, were used to investigate their effect on the greenhouse effect (GHE) during the municipal solid waste (MSW) stabilization process. We found that the vent-pipe φ influenced both MSW degradation and GHG emissions, increasing the vent-pipe φ which improved the removal of carbon and nitrogen-based pollutants. The GHG emissions were 364, 356, and 309kg CO2 equivalents per ton of MSW from the SABL2, SABL1, and SABL3, respectively, during the operation of 465days. Of the three GHGs, CH4 influenced the GHE the most, contributing 72.53%, 79.17%, and 71.42% in SABL1, SABL2, and SABL3, respectively. In the same sequence, CO2 (14.87%, 14.06%, and 21.9%) and N2O (12.6%, 6.77%, and 6.69%) were the second and third contributors to the GHE, respectively. Considering the rapidly MSW stabilization and the mitigation of GHG emissions, a vent pipe with φ of 75mm in the SABL column (φ of 800mm) was suggested. Moreover, the GHG mitigation in the SABL should be implemented by prioritizing CH4 collection and oxidation. The results provided a technical guidance for GHG mitigation in MSW management.

GHG Emissions Assessment as Part of MSW Green Cluster Design: Case of Large Cities in Russia and Kazakhstan

Abstract The increasing pressure on the environment and the exhaustion of non-renewable natural resources has led to the emergence of a new type of clusters – green clusters. In green clusters, the purpose of combining entities into a cluster is not only to increase their competitiveness, but also to increase the efficiency of using natural resources and reduce the impact on the environment. Companies of various types of activities get united into green clusters; this article considers green clusters in the field of municipal solid waste (MSW) management. The authors described two green clusters in project in the field of MSW management in two large cities – Yekaterinburg (Russia) and Almaty (Kazakhstan). The main difference between these clusters is the ratio between waste management practices. Further, using the IPCC methodology for calculating greenhouse gas (GHG) emissions, the authors analysed GHG emissions per tonne of MSW in both clusters. The calculations have shown that the green cluster of Yekaterinburg is more stable and efficient – the carbon content of 1 tonne of processed MSW in Yekaterinburg is 22.4 % lower than it is in Almaty (329.5 kg CO2eq/tonne of MSW in Yekaterinburg and 424.1 kg CO2eq/tonne of MSW in Almaty). To reduce the MSW green clusters’ climatic impact, it is necessary to organize a full-fledged separate collection of different types of waste at the household level; to stimulate waste recycling activities; to reduce the use of non-recyclable packaging, including the implementation of extended producer responsibility; to reduce energy utilization, especially at the waste incineration plants; to stimulate the use of organic waste shredders. The practical examples discussed in this article and the conclusions obtained can be useful to decision makers regarding the design and development of green clusters in the field of MSW management in large cities. The study relies on the research data of the project ‘Enhancement of the State Regulation Policy for Intensifying Clusterization of Industrial Regions’ supported by the Ministry of Education and Science of the Republic of Kazakhstan.

Trends in the rational use of municipal solid waste

Is not yet possible to create a full-fledged municipal solid waste management industry in Russia, as private investors currently do not consider this area promising for investment, even if there is a positive domestic experience. Since the механизмыfree market mechanisms in this industry have not worked, it is the state that has the main task of forming all the infrastructure necessary for MSW management, so the purpose of this article is to consider the main directions of MSW use in accordance with global trends and the possibility of using the experience of other countries that have achieved high results in this area. Today, Russia generates about 70 million tons of municipal solid waste (MSW) per year. According to the figures laid down in the national project “Ecology”, by 2024, 60% of garbage should be processed, that is, sorted, and then sent for recycling, 36% of the total volume of waste should be recycled. To do this, it is necessary to additionally build capacities capable of sorting 37.1 million tons of MSW. At the same time, enterprises operating in this segment, have a shortage of financial resources - half of the approximately two hundred operators in the country have cash gaps, accounts payable and receivables are growing, and operations are becoming unprofitable. In these circumstances, it is very important to consider the mechanisms that can increase the attractiveness of the industry for business and ensure its profitability.

The municipal solid waste disposal of Okhla landfill in Delhi: locating legal framework and institutional responses

It is estimated that out of the 9,600 tonnes of municipal solid waste (MSW) generated by Delhi only 78% of the waste is collected, 9% is treated by composting, and the remaining gets dumped in one ...

Compost of Biodegradable Municipal Solid Waste as a Fuel in Lignite Co-combustion

In Greece, 5.8 million tons of municipal solid wastes (MSW) are produced annually, of which 2.47 million tons are bio-wastes. Composting is an alternative treatment of bio-wastes instead of landfill. Τwo composting plants operate in Greece, one in Ano Liossia (capacity 1,200 tons/day, producing 120 tpd compost) and another in Chania (capacity 70,000 tons/year, producing 20,000 tpa compost). In addition, since 2018, the first integrated waste management plant was set off in the region of Kozani (capacity 120,000 tons/year). An alternative utilization of the compost, produced in the latter plant, was investigated in this study. In particular, instead of using compost as fertilizer, the energy recovery from this bio-waste was attested. Utilization of compost of MSW for energy production purposes has rarely been studied in the literature. Several blends of compost with lignite were prepared and their energetic potential was determined. Proximate analyses and gross calorific value (GCV) determination were conducted. Wastes and biomass-based fuels differ in many ways from fossil fuels. The CLOF sample revealed the highest GCV and the lowest ash content than all analyzed samples. Based on all analytical determinations, compost and its mixtures with lignite could be regarded suitable for energy recovery by thermal processes, such us combustion. Further studies should be done including emission analysis, ash deposition during combustion (corrosion, slagging and fouling).

Production of gasoline from municipal solid waste via steam gasification, methanol synthesis, and Methanol-to-Gasoline technologies: A techno-economic assessment

A techno-economic analysis of the process of producing gasoline via steam gasification of municipal solid waste (MSW) using dolomite catalysts, followed by a methanol synthesis and a methanol-to-gasoline process (SGMG) was conducted using an Aspen Plus model and an economic assessment. The process includes six steps: MSW pretreatment, steam gasification of MSW to produce syngas, gas purification through CO₂ and acid gas removal, methanol synthesis using syngas, conversion of methanol to gasoline, and gasoline separation. The Aspen Plus model used to estimate the energy and mass balance for sizing the equipment assumed that 2000 dry metric tonnes of MSW per day would be processed. Capital investment required and operating costs of gasoline production were estimated based on the Aspen Plus model's mass and energy balance and an nth plant. The minimum selling price (MSP) of gasoline was calculated using the capital investment and operating costs of the process. The total capital investment of the process was estimated to be ＄148 million, with an annual operational cost of ＄56 million. The minimum selling price was determined at ＄2.40/gal for a 20-year project life. The sensitivity analysis showed that the cost of feedstock has a direct impact on the MSP of gasoline, and MSP could decrease to ＄1.55/gal if the owners of the plant received disposal fees. Increasing the gasoline yield to 0.125 kg of gasoline/kg of MSW decreased the MSP to ＄1.86/gal. The ash content in MSW played a vital role in estimating the MSP. If the ash content in the feedstock increased, the MSP increased owing to a decrease in the gasoline yield and an increase in the cost of operations.

Overview on Use of Zeolites as Bulking Agent to Optimize Organic Waste Composting Process

There is about 2.01 billion metric tons of municipal solid waste (MSW) produced annually and organic waste constitutes of a major portion from total waste generation worldwide. This current circumstance not only create extra burden on the landfill, but also causing some environmental issues such as greenhouse gases emission, odor emission and leachate production. Therefore, a sustainable and pro-environmental of organic waste disposal solution is acknowledged by composting practice. However, organic waste consists of some significant properties include high in salt, oil, nitrogen and moisture content. All of these properties contributing difficulties on the efficiency of organic waste composting process. In previous studies, researchers had studied various bulking agents such as biochar, sawdust, lime and others in order to optimize the efficacy of composting process. Nevertheless, utilization of zeolite as bulking agent in composting process is getting famous in the recent years due to its unique physiochemical characteristics. Hence, this article attempts to review the potential of zeolites in optimizing the composting process for better understanding of the mechanism as well provides valuable insights for sustainable organic waste management practice.

Performance of structural concrete using Waste-to-Energy (WTE) combined ash

In the U.S., about 27 million metric tons of municipal solid waste are used as fuel in Waste-to-Energy (WTE) power plants, generating about seven million tons of mixed bottom ash and fly ash (combined ash) annually, which are disposed of in landfills after metal separation. This study assessed the effect of using combined ash as a substitute of mined stone aggregates on the mechanical properties and leachability of cement mortar and concrete. The as-received combined ash was separated into three fractions: fine (<2 mm), medium (2–9.5 mm), and coarse (9.5–25 mm). The substitution of up to 100% of stone aggregate by the coarse and medium fractions of combined ash produced concrete with compressive strength exceeding 28 MPa after 28 days of curing. Similar results were obtained when the fine combined ash was used as a sand substitute, at 10 wt%, in mortar. The concrete specimens were subjected to several days of curing and mechanical testing. The results were comparable to the properties of commercial concrete products. The mechanical test results were supplemented by XRD and SEM analysis, and leachability tests by EPA Method 1313 showed that the optimal concrete products effectively immobilized the heavy metals in the combined ash.

Gasification of Municipal Solid Waste: Thermodynamic Equilibrium Analysis Using Gibbs Energy Minimization Method and CFD Simulation of a Downdraft Gasifier

Millions of tons of municipal solid waste (MSW) are generated annually, posing dramatic threats to our environment. To reduce its environmental impact, MSW can be segregated and thermochemically converted into clean syngas (CO and H2) fuel via gasification process. The feasibility of Gasification of MSW depends on its composition and quantity. In this work, assessment of the gasification metric of MSW is conducted under steam (H2O) as gasification moderator in a pilot scale 20kW gasifier. The characteristic of local MSW are experimentally determined using Flash 2000 organic analyzer (CHNS-O), the thermo-gravimetric analyzer (TGA) and bomb calorimeter following ASTM standards and arriving to molar formula of MSW. A thermodynamic equilibrium model based on Gibbs energy minimization method is used for the steam gasification of MSW to assess the composition of syngas. Using the baseline operating condition from the thermodynamic equilibrium model, a reactive high fidelity numerical model of a downdraft gasifier is developed to gain more fidelity. Result of gasification efficiency of thermodynamic model is 64% while reactive model gives 7% additional efficiency. Nonetheless, the stipulated efficiency and the high-quality syngas produced via the steam gasification of MSW suggest the viability of the process scale up.

Evaluation of municipal solid waste management system of Quito - Ecuador through life cycle assessment approach.

In Latin America and the Caribbean, the suitable processing of waste through the use of landfills is around 55%, while the local governments with municipal solid waste (MSW) management plans are around 20%. In Quito, for instance, approximately 2000 ton/day of solid waste are collected, and disposed in El Inga Landfill. The objective of this study is evaluating the MSW management of Quito through Life Cycle Assessment (LCA) approach. For achieving this goal, the ISO 14040 methodology was followed and SimaPro 8.4 was used as analysis software. The functional unit used is 1 ton of MSW, while, the material of study was the waste generated in households, commercial sector, schools and markets; whose values were obtained by the public companies EMASEO-EP, EMGIRS-EP, as well as from the open-access data of the city. The results show that using of biogas from the landfill allows the maximum saving of greenhouse gases (GHG) emissions. Therefore, the biogas plant is the process with less environmental impact. The compaction and transportation of MSW displayed a slightly higher impact comparing with the previous process, presenting the second-best environmental performance. On the other hand, the leachate treatment shows the greatest environmental impact according to the model, despite of the effluents does not exceed the permissible limits of the environmental Ecuadorian legislation. The researchers consider suitable the analysis of composting and anaerobic digestion techniques as complementary options to reduce this environmental impact, due to the high organic fraction in the analyzed waste

FREDERIC-BACK PARK, MONTREAL, CANADA: HOW 40 MILLION TONNES OF SOLID WASTE SUPPORT A PUBLIC PARK

The City of Montreal, Quebec, Canada, took over the management, in 1988, of a former limestone quarry that was also used as landfill site. The surrounding population of this site was exposed to many nuisances related to the rock extraction and transformation and to the landfilling activities. So, the main goal of the city was to rehabilitate this degraded site, build a public park and give it back to the population. The site’s total area covers 192 ha. From this surface, 72 ha were devoted to the landfill. Over the years, 40 million tons of municipal solid waste have been landfilled. Building a park on such a large site that still produces landfill gas and leachate involves several major challenges. The priority was first to control the landfill gas and the leachate to minimize environmental risks and impacts. In parallel, a process involving design workshops, research, testing, brainstorming and topographical models was launched in order to develop the Master Plan for the park construction. The Master Plan provides the framework for teams working on the project, sets the guidelines for the site’s rehabilitation and phase-by-phase transformation based on the principles of sustainable development. The park construction was initiated in the mid nineties. Nowadays, 48 hectares are already open to the population. The Park will be finalized around 2026 and will then be completely accessible to the public. This is the result of a close collaboration between the Department of Parks and the Department of Environment of the City of Montreal.

Green chemistry – Remedy to societal hygiene: A graphical review

India, as a consequence of rich demography, on an average every year produces 62 million tonnes of municipal solid waste; amidst 9000 tonnes are sanitary wastes including pads and diapers. Nevertheless, mounting up testimonies have established the adversities associated with sanitary waste that plunge unsympathetic impacts on societal hygiene. By accumulating, amalgamating, and processing a current investigation, we have arranged a precise sketch on the harms like immune-toxicity, endocrine effects, and tumor promotion by volatile organic compounds like dioxins surfacing from the waste. Also, sustainable approaches viz. using clay-based incinerators in preventing the spread of detrimental gases and exchanging plastic-based synthetic sanitary products with nature-derived green remedies for the prime citizens of the country – Women & Children, and their future applications to generate circular economy. In this graphical review, we showcased how India holding the hands of green chemistry brought science out of the lab into the daily life, making historical amendments, implementing a green, educated, and healthy society.