scholarly journals Rapid Stabilization of Municipal Solid Waste in Bioreactor Landfills: Predictive Performance Using Coupled Modeling

2019 ◽  
Keyword(s):  
Numerical Model ◽  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
The United States ◽  
Moisture Distribution ◽  
Spatial And Temporal Variation ◽  
Biological Processes ◽  
Bioreactor Landfills ◽  
Management Options

<p>Municipal solid waste (MSW) landfills are one of the major and most preferred waste management options in the United States and many other countries across the globe. The waste in conventional MSW landfills undergoes very slow decomposition due to limited amount of moisture. In this regard, the bioreactor landfills have emerged as an effective waste management option, wherein leachate recirculation/injection is carried out to enhance the moisture levels within the waste thereby facilitating rapid waste decomposition and leading to early waste stabilization. However, in practice the performance of bioreactor landfills has remained inconclusive due to the lack of sound basis for effective design and operation of such landfills. This further stems from the fact that there is a limited understanding of the physical, chemical and biological processes and their coupled interactions on the MSW behavior in landfills. Hence, it becomes imperative to understand the influence of the coupled processes on the waste behavior to predict the overall performance of bioreactor landfills. Several researchers have developed numerical models to simulate waste behavior but only a few models have considered the simultaneous interactions of hydraulic, mechanical, and biological processes within the waste in their numerical model. In this study, newly developed numerical framework incorporating coupled thermo-hydro-bio-mechanical processes is presented. The numerical model can predict the spatial and temporal variation of waste temperatures, moisture distribution, gas generation, pore pressures, waste settlement, waste slope stability, and interface shear response in the landfill liner system. The numerical model has been validated with lab-scale and field-scale experiments and could be used to design and operate stable and effective bioreactor landfills.</p>

Global capacity, potentials and trends of solid waste research and management

2017 ◽  
Vol 35 (9) ◽  
pp. 923-934 ◽  
Author(s):  
Michael A Nwachukwu ◽  
Mersky Ronald ◽  
Huan Feng
Keyword(s):  
United States ◽  
Developing Countries ◽  
Waste Management ◽  
Solid Waste ◽  
Solid Waste Management ◽  
The United States ◽  
Waste To Energy ◽  
Management Options ◽  
Research Impacts ◽  
Global Capacity

In this study, United States, China, India, United Kingdom, Nigeria, Egypt, Brazil, Italy, Germany, Taiwan, Australia, Canada and Mexico were selected to represent the global community. This enabled an overview of solid waste management worldwide and between developed and developing countries. These are countries that feature most in the International Conference on Solid Waste Technology and Management (ICSW) over the past 20 years. A total of 1452 articles directly on solid waste management and technology were reviewed and credited to their original country of research. Results show significant solid waste research potentials globally, with the United States leading by 373 articles, followed by India with 230 articles. The rest of the countries are ranked in the order of: UK > Taiwan > Brazil > Nigeria > Italy > Japan > China > Canada > Germany >Mexico > Egypt > Australia. Global capacity in solid waste management options is in the order of: Waste characterisation-management > waste biotech/composting > waste to landfill > waste recovery/reduction > waste in construction > waste recycling > waste treatment–reuse–storage > waste to energy > waste dumping > waste education/public participation/policy. It is observed that the solid waste research potential is not a measure of solid waste management capacity. The results show more significant research impacts on solid waste management in developed countries than in developing countries where economy, technology and society factors are not strong. This article is targeted to motivate similar study in each country, using solid waste research articles from other streamed databases to measure research impacts on solid waste management.

scholarly journals Composition Analysis of Municipal Solid Waste A Case Study in Benghazi, Libya

2018 ◽  
Vol 6 (3) ◽  
pp. 387
Author(s):  
Faisal Ali Mohamed Baba ◽  
Miraç Aydın ◽  
Idris Imneisi
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Solid Waste Management ◽  
Composition Analysis ◽  
Management Options ◽  
Important Conclusion ◽  
Representative Sampling ◽  
Household Hazardous Waste

Benghazi, like other cities in Libya, faces problems associated with poorly managed solid waste operation. The uncertainty of the types of municipal solid waste (MSW) it is the challenge that, hinders chosen the best method for solid waste management. This study deals composition analysis of the city’s MSW as, sustainable waste management options. To specify types of MSW the samples collection in wet seasons and dry seasons. Number of samples collected as 40 samples per season. And to get a representative sampling, in this case employed a range of sampling techniques including stratified sampling, systematic random sampling, and purposive sampling. The samples was collected, mixed and then weighed as, kilogram (Kg). The samples were characterized. as, paper, glass, metals, plastics, textiles, non-food, food and putrescibles, misc-combustibles, misc. non-combustibles, household hazardous waste. And then the samples weighed again to determine the proportion of each type. Finally, this study forwarded some important conclusion and recommendations towards improving the current situation.

scholarly journals Social Context of Solid Waste Disposal among Residents of Ibadan Metropolis, Nigeria

2020 ◽  
Vol 89 ◽  
pp. 16-24
Author(s):  
Temitope A. Ogunweide
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Disposal ◽  
Sustainable Management ◽  
Solid Waste Management ◽  
Solid Waste Disposal ◽  
Management Options ◽  
Management Hierarchy ◽  
Waste Handling

The study sought to assess the social context of solid waste disposal pattern of residents in Ibadan metropolis, in order to assess the Solid waste disposal patterns of people in Ibadan metropolis, Oyo State, Nigeria. Specifically, the study identified solid waste disposal habits of residents, frequency of clearing the dumpsters, accessibility of waste dumpsters to people determines the waste disposal pattern of people; and analyze the willingness of people in Ibadan to pay for improved service. Solid waste management has been part of human activities right from time. Efforts by Oyo State Government is seen in the collection of dirt that have been placed on the medians. Waste generation is an unavoidable product of man activities, however, sustainable management of such waste is a challenge faced in many countries today. Nigeria, a developing country in Africa, has been in a quandary of how to efficiently manage the municipal solid waste its population generates. Many states in the country lack adequate plans and infrastructure required for efficient and sustainable management of municipal solid waste. For Ibadan, the largest city in Nigeria, the problem is further compounded by its rather large and still increasing population. In this research, Ibadan metropolis is taken as a case study; the rate of solid waste handling in households as regards solid waste management from household collection to final disposal are focused upon. The study found out that 45.6% drop their refuse in the dumpsters as 18.8% burns their refuse, 17.7% of the respondents drops their waste on the median, 12% in the drainage while 6% opts to drop their waste in the streams. On the effectiveness of the Private operators collecting waste from the respondents, the study found out that 7.6% effective, 37.5% of the respondents says the operators waste collection is poor, 7% says it is abysmal while 43.5% said it is not applicable to them because they do not have storage containers in their houses and as a result did not subscribe to their service. Many countries, particularly the developed ones, have employed options in the waste management hierarchy for sustainable management of their municipal solid waste and the blend of options employed is usually highly dependent on local factors. Following the waste management hierarchy, possible options for sustainable municipal solid waste management in Ibadan are discussed. It is concluded that waste reduction, reuse, and recycling are potential management options for the state. Landfilling will remain an important option for final disposal but reliance on this method could be significantly reduced if management options are exploited to the maximum in a sustainable solid waste management structure in Ibadan metropolis. Key Words: Waste handling, Ibadan Metropolis, Landfill, Municipal Solid Waste Word Count: 435

Energy Recovery From Municipal Solid Waste in California: Needs and Challenges

2010 ◽  
Author(s):  
Alexander E. Helou ◽  
Kim Tran ◽  
Cecile Buncio
Keyword(s):  
United States ◽  
Air Quality ◽  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Energy Recovery ◽  
Solid Waste Management ◽  
The United States ◽  
Environmental Benefits ◽  
Waste To Energy

Thermal technologies, such as gasification, pyrolysis, waste-to-energy (WTE), and advanced thermal recycling (second generation WTE with the most advanced air emission control system), can be employed to recover energy from municipal solid waste (MSW), reduce the volume of material to be landfilled, and lessen the potential emission of methane. Methane is a potent greenhouse gas and a major component of landfill gas. All operating WTE facilities in the United States have been subjected to strict environmental regulations since the passage of the Clean Air Act Amendments in 1990. As a result, U.S. WTE facilities now meet or exceed stringent local air quality standards, including those imposed by the South Coast Air Quality Management District (SCAQMD) in Southern California. The United States Environmental Protection Agency (EPA) recognizes the important role of WTE in the integrated solid waste management and ranks combustion higher than landfilling in its solid waste management hierarchy. In addition to upstream source reduction and recycling, downstream thermal treatment of the residual MSW (conducted in controlled environment) can effectively recover energy and further reduce waste volume. Despite all the advantages and environmental benefits of thermal technologies, its utilization for treating MSW in California still faces many challenges. These include negative public perceptions, economical disadvantages, local marketability of by-products, and disposal options for residuals. This paper discusses the need to include energy recovery in the integrated MSW management in California and the challenges encountered by many local jurisdictions.

Sign in / Sign up

Export Citation Format

Share Document