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Journal of Environmental Sciences 2015年第2期27卷 178-186页

作者： Kosuke Toshiki Pham Quy Giang Kevin Roy B.Serrona Takahiro Sekikawa Jeoung-soo Yu Baasandash Choijil Shoichi Kunikane Graduate Division of Nutritional and Environmental Sciences University of Shizuoka Faculty of Land management Vietnam National University of Agriculture Department of Interregional Environmental System Graduate School of International Cultural Studies Tohoku University School of Mechanical Engineering The Mongolian University of Science and Technology

Currently, most developing countries have not set up municipal solid waste management systems with a view of recovering energy from waste or reducing greenhouse gas emissions. In this article, we have studied the possible effects of introducing three energy recovery processes either as a single or combination approach, refuse derived fuel production,incineration and waste power generation, and methane gas recovery from landfill and power generation in Ulaanbaatar, Mongolia, as a case study. We concluded that incineration process is the most suitable as first introduction of energy recovery. To operate it efficiently,3Rs strategies need to be promoted. And then, RDF production which is made of waste papers and plastics in high level of sorting may be considered as the second step of energy ***, safety control and marketability of RDF will be required at that moment.

关键词： municipal solid waste management Energy recovery Greenhouse gas emissions Landfill volumes Developing country Refuse derived fuel

A critical review:emerging bioeconomy and waste-to-energy technologies for sustainable municipal solid waste management

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waste Disposal and Sustainable Energy 2019年第3期1卷 151-167页

作者： To-Hung Tsui Jonathan W.C.Wong Department of Biology Institute of Bioresource and AgricultureSino-Forest Applied Research Centre for Pearl River Delta EnvironmentHong Kong Baptist UniversityKowloon TongHong KongChina

municipal solid waste(MSW)management has emerged as probably the most pressing issue many governments nowadays are ***,waste-to-Energy(WtE)is mostly associated with incineration,but now,with the emergence of the bioeconomy,it embraces a broader definition comprising any processing technique that can generate electricity/heat or produce a waste-derived *** the ambit of the circular economy many nations are looking for,additional effort must be made to be sure of acquiring the most updated information and paving a sustainable path for managing MSW in such a *** this regard,we have undertaken a critical review of various technologies,with their updated progress,involved in the exploitation of MSW as a renewable resource,along with the critical advantages and limitations on energy and material cycling for sustainable MSW ***,the most widely used method,is nowadays difficult to further apply due to its dubious reputation and social ***,to address the organic fraction of MSW which currently is mostly unrecycled and causes disposal issues,the biological approach presents an attractive *** new emphasis of bioeconomy leads us to understand how environmental biotechnologies should be better connected/integrated for more sustainable MSW *** article is concluded with advances of future prospects,which can serve as a timely reminder to encourage competent authorities/researchers to work towards further improvement of the present MSW management system.

关键词： municipal solid waste management Sustainability Circular economy Bioeconomy waste-to-energy Anaerobic digestion

Assessing the Factors Influencing Effective municipal solid waste management System in Barishal Metropolitan Areas

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Journal of Geoscience and Environment Protection 2023年第1期11卷 49-66页

作者： Tareq Mahamud Abir Mallika Datta Sumi Rani Saha Associate Professor Department of Sociology University of Barishal Barishal Bangladesh Independent Researcher Barishal Bangladesh Assistant Professor Department of Sociology University of Barishal Barishal Bangladesh

Unorganized municipal solid waste (MSW) disposal system leads to stress on ecosystems and disturbs various nature cycles and human health. solid waste management all over world is looked as a major challenge to civil bodies, especially in developing countries like Bangladesh. The proper management system of municipal solid waste depends on various factors like social, cultural, financial, political, environmental, physical and institutional and so on. The purpose of this study is to explore the leading factors that affect the solid waste management in Barishal city. For achieving this purpose, this research first has identified the socio-economic, cultural, physical and technical, institutional and environmental factors and then analyzed the factors which affect the solid waste management system in the study area. To achieve the purpose of the study, quantitative method has been used in this research. As a sample of this study, 150 household heads from total household members of the city have been selected randomly by using lottery method. A structured questionnaire has been constructed for collecting quantitative data. The quantitative data have been analyzed in this study by using SPSS Program, and Microsoft Excel. The findings of the study show that all city people know solid waste and solid waste management stakeholders present in the city and waste pickers collect all types of waste in the city and socio-economic, cultural, physical and technical, institutional factors affect the effective solid waste management in the study area where environmental factors have no influence on effective solid waste management in the study area. The study people have a bad impression of the current existing management system of the solid waste and they express their expectations where they mention that if municipal authorities improve the condition of the infrastructure, roads and vehicles;allow more budgets to manage waste;take proper strategies and planning to manage waste sm

关键词： Ecosystem solid waste management municipal solid waste management

Current Situation Analysis and Suggestions for solid waste management Practices among Households in Freetown

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Journal of Geoscience and Environment Protection 2024年第3期12卷 95-109页

作者： Patrick Fayia Kanty Mohamed Yateh Yongji Zhang College of Environmental Science and Engineering Tongji University Shanghai China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science Engineering Tongji University Shanghai China

Freetown which is the capital city of Sierra Leone is facing challenges with population growth, urbanization, and industrialization, leading to an increase in municipal solid waste (MSW) generation. The study aims to evaluate MSW generation, composition, and disposal methods, as well as the impact of collection fees, policy implementation, and women’s participation in municipal solid waste management (MSWM). The study used both qualitative and quantitative methods for data collection and analysis. The study administered 393 structured questionnaires in three selected sections to collect data on variables such as family size, education, level of knowledge, etc. The study used door-to-door data collection to determine the rate of solid waste generation, composition, and disposal in 66 households from two of the selected sections and 34 households from the other section to evaluate the current situation of MSWM practices among households in Freetown. The study used a descriptive statistic to analyze the data collected using Origin-Pro9 and MS Excel software. The findings showed that with a 4.2% urban growth rate, Freetown had a population of 1,467,543 in 2023, generating 851 tons of MSW per day, with organic waste accounting for 78% of the total MSW generated. Plastic waste generation also increased from 7.6% in 2020 to 13% in 2023. The study emphasizes the need to sustain the MSWM system by prioritizing solid waste collection fees, policy enforcement, and women’s participation in the MSWM sector. It further suggests and provides recommendations for developing an efficient and sustainable MSWM system in Sierra Leone, including knowledge transfer from countries like China and the US.

关键词： Freetown municipal solid waste management waste Composition waste Disposal waste Generation

Generation, Characterization and management Practices of Household solid wastes in Cowfield, Paynesville City, Liberia

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Journal of Geoscience and Environment Protection 2021年第4期9卷 113-127页

作者： Fallah Nyumah Joseph F. Charles Isaac A. Bamgboye Ademola K. Aremu James S. Eisah Environmental management Pan African University Institute of Life and Earth Sciences Institute (PAULESI) University of Ibadan Ibadan Nigeria Department of Environmental Science William VS Tubman University Harper Liberia Department of Interdisciplinary Research Honors College of Research and Gender Studies University of Liberia Monrovia Liberia Environmental Engineering Department of Agricultural and Environmental Engineering University of Ibadan Ibadan Nigeria School of Environmental Science and Climate Change University of Liberia Monrovia Liberia

The success of any waste management system requires accurate and up-to-date data on quantity, composition of waste. waste generation data from household are needed to address issues relating to municipal solid wastes ... 详细信息

The success of any waste management system requires accurate and up-to-date data on quantity, composition of waste. Waste generation data from household are needed to address issues relating to municipal solid wastes such as management method, performance improvement, policy, regional and local planning, administrative, cost accounting, design and operation of landfill facilities and environmental quality. This study was conducted to provide empirical data on generation rates, quantity and composition, management practices, challenges and strategies from urban household. Waste collection, weighing, questionnaires survey and field observation were methods used during the study. Waste was collected and weighed from 60 households using multi-stage sampling technique for seven days. Questionnaires were analyzed using Statistical Package for Social Sciences version 20 and Excel. A total of 1125.2 kg of waste was recorded. The average household waste generation was 3 kg per day with per capita generation rate of 0.41 kg/cap/day. The compositional analysis showed that Organic (53%), Plastic (11%), Textile (6%), Metal (2%), Glass (1%), Paper and Cardboard 4% and others (22%). solid waste management practices are very rudimentary. Burning (53.7%) and Open Dumping (30%) were found to be the most commonly used method of disposal with very limited collection service (33.3%) and segregation. The most challenges faced by households were communal disposal area (66.7%) and waste service providers (21.7%) storage bins (11.6%). waste to energy (48.3%) and compositing (23.3%) were the most considered option for waste management by the respondents.

关键词： waste Generation Composition Household municipal solid waste management

An Analysis of solid waste Generation and Characterization in Thika municipality of Kiambu County, Kenya

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Journal of Environmental Science and Engineering(B) 2015年第4期4卷 210-215页

作者： Mugo Ephantus Kinyua Robert Njogu Paul Institute of Energy and Environmental Technology Jomo Kenyatta University of Agriculture and TechnologyNairobi 62000-00200 Kenya

The rapid increase in population in Thika has led to increase in municipal solid waste generation, which has posed challenges in the waste disposal and management. This study was carried out to quantify and characterize the waste generated within Thika municipality. Six months data （between March 2014 and August 2014） of waste stream at the dumpsite was reviewed and analyzed. The survey indicated that 66.95% ± 0.34% of the total waste dumped originated from the municipal council ofThika （MCT）. It constitutes of domestic, commercial and institutional waste. 33.05% is industrial waste. Sixty eight percent （68%） of the waste consisted primarily of four components： paper, plastic, organics and food. Food accounted for 15.51% ± 0.95%, paper 18.31% ± 1.7%, plastics 17.89% ± 0.81% and organics other than food 16.51% ±1.01%, respectively obtained at 95% confidence level. Each of the components has some level of recovery. Some of the reusable and recyclable materials were being recovered, food waste had the highest recovery rate of 23% ± 1.7% and was used as animal feed, while plastic （soft plastic） 17% ± 0.93% was sold to recyclers. Recovery of materials for recycling and composting was estimated at 10.21 tonnes or 11.35% of daily generation, leaving 76.44 tonnes per day that can be converted into useful energy. The study shows waste in this dumpsite can be exploited to by converting it to energy thus a good solution for waste management.

关键词： municipal solid waste municipal solid waste management waste to energy Thika municipality.

GHG Emissions Estimation from Household solid waste management in Jakarta, Indonesia

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Journal of Energy and Power Engineering 2013年第4期7卷 661-668页

作者： Aretha Aprilia Tetsuo Tezuka Graduate School of Energy Science Department of Socio-Environmental Energy Science Kyoto University Kyoto 606 -8501 Japan

This study defines and compares four scenarios for MSW （municipal solid waste） management： Scenario 1, unsorted waste taken to a landfill （baseline scenario）; Scenario 2, sorted waste used for home or communal composting; Scenario 3, sorted waste used for anaerobic digestion; and Scenario 4, sorted waste taken to a composting centre. The results of this study suggest that Scenario 1 would emit the highest levels of GHG （greenhouse gas） emissions, 692 x 103 tonnes CO2eq per year. Scenario 3 would have the lowest levels of GHG emissions, 195 x 103 tonnes CO2eq per year. Compared with the baseline scenario, it yields a 72% reduction of GHG emissions with a total savings of 498 ~ 103 tonnes CO2eq per year. The second-best option is Scenario 2, followed closely by Scenario 4, both yield 66.6% reductions with deviation by 0.03%. The deviation is due to transportation, which emission is negligibly small. The amounts of GHG savings for Scenario 2 and 4 are 461.3 ×10^3 tonnes CO2eq per year and 461×10^3 tonnes CO2eq per year, respectively It is evident from these results that anaerobic digestion has the highest potential for reducing GHG emissions.

关键词： municipal solid waste management greenhouse gas emission Indonesia.

Evaluating the Effects of the Concentration of Large Scale municipal solid waste Incineration Facilities Using Geographical Information System

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Journal of Environmental Science and Engineering(B) 2013年第1期2卷 53-60页

作者： Kosuke Toshiki Pham Quy Giang Jeong Soo Yu Institute for Environmental Sciences University of Shizuoka Shizuoka 4228526 Japan Graduate School of Nutritional and Environmental Sciences University of Shizuoka Sh&uoka 4228526 Japan Faculty of Natural Resources and Environment Hanoi University of Agriculture Hanoi 100803 Vietnam Graduate School of International Cultural Studies Tohoku University Sendai 9808576 Japan

In Japan, each municipality generally has its own municipal solid waste incineration facilities because of the principle of self-management in the respective territories. Typically, a small municipality often owns a small facility. However, a large facility which can run continuously at high temperature with stability would be preferable if the dioxin generation mechanism is to be considered. Accordingly, municipalities in contiguous areas should cooperate mutually by using a large facility. To evaluate the effect of the concentration of large facilities, the authors created a GIS （Geographic Information System） based database of combustible waste generation at town level in Shizuoka Prefecture. Focusing on large facilities in Shizuoka City and superannuated facilities in Shida area, the authors evaluated the effect of the concentration of large facilities in Shizuoka city on utilization rate of facilities, energy balance and CO2 emissions. Our results showed the amount of light oil consumption and CO2 emissions increased because the mileage distance of garbage collection trucks becomes longer. However, the utilization rates of facilities and the amount of energy recovery from waste are improved. From these standpoints, the authors conclude that the concentration of large facilities is better compared to a single municipality based facility.

关键词： municipal solid waste management wide area joint management energy recovery from waste CO2 emissions GIS.

The Challenge of waste Treatment at the Hiriya Landfill, Tel-Aviv, Israel

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The Challenge of Waste Treatment at the Hiriya Landfill, Tel...