Bituminous Pavement Constructed With Municipal Solid Waste Combustor Ash: Construction, Performance, and Economic Issues

Author(s):  
Samuel P. Lucido ◽  
Willard Wilson

The Polk County Solid Waste Department, located in Polk County Minnesota, participates in a complete integrated solid waste management program that includes four other counties in northwest Minnesota. One component of the integrated solid waste management program includes the operation of a municipal waste combustor (MWC) that combusts approximately 65 tons per day of processed solid waste. The starved air design of the combustor causes low turbulence in the primary burning chamber minimizing particulate carryover through the system. This results in generation of approximately 12 tons per day of combined ash comprised of 98 to 99 percent bottom ash and 1 to 2 percent fly ash, by weight.

Author(s):  
Willard Wilson

In the early 1980’s Polk County and four other partner counties in rural Northwest Minnesota made the decision to incorporate a waste to energy (WTE) plant into their solid waste management program. This decision was made to comply with the Minnesota hierarchy for solid waste management, to extend the life of the Polk County landfill, and to recover valuable energy from the waste. The plant was constructed in 1987 and began burning MSW in 1988. The processing technology consisted of two starved air mass burn municipal solid waste combustors each with a combustion capacity of 40 tons of MSW per day, and produced energy in the form of saturated steam for customers in the adjacent industrial park. Initially each train utilized a two field electrostatic precipitator (ESP) as the air pollution control (APC) device. In 1996, a materials recovery system (MRF) was constructed in front of the waste combustors to remove problem/objectionable items most of which are recyclable. This facility has been a tremendous success providing many benefits including reduced stack emissions, lower O & M costs for the WTE units, and revenues from the sales of extracted recyclables. In 1998 Polk began injecting powdered activated carbon (PAC) into the flue gas of each unit upstream of the ESP to attain compliance with new State limits for dioxin/furans and mercury. Then in 2000 Polk County proceeded with an APC retrofit project designed to meet revised EPA emission guidelines which set more stringent limits for pollutants currently regulated and added limits for several other pollutants previously unregulated. In 2001 and 2004 Polk County performed research demonstration projects substituting screened WTE combined ash for a portion of natural aggregate in two asphalt road construction projects. Both projects passed stringent environmental testing and demonstrated superior strength and flexibility performance compared to conventional asphalt. Polk County is now proceeding with the installation of a turbine/generator to produce renewable electricity with excess steam. The electricity produced will be used to reduce the demand for incoming power from the local utility. Initially this may be only a twenty-five percent reduction but has the potential to be more in the event one or more of the steam customers reduces their dependence on steam from the WTE plant. All of these projects received funding assistance from the State of Minnesota in the form of Capital Assistance Grants. In 2003 the WTE plant and MRF became debt free and Polk County lowered the tip fee resulting in a disposal rate that is fairly competitive with that of most out of state landfills. This paper will discuss the development, success, and benefits of this completely integrated solid waste management system for these five counties located in Northwest Minnesota.


Author(s):  
T. Khamkeo ◽  
◽  
S. Phaisansuthichol ◽  
P. Supapunt ◽  
M. K. Pholchan

Quantification and characterization of municipal solid waste are vital information for a proper solid waste management. However, these are under-investigated and scarcely implemented in Laos PDR, especially the local communities. This work, therefore, aimed to quantify and characterize municipal solid waste generated from Beung Kiat Ngong Ramsar Site and to recommend possible integrated solid waste management strategies for a sustainable waste management. The average daily waste generation was estimated to be 3.6 kg/day and 2.6 kg/day in Thabou village and Kiat Ngong village, respectively. Organic waste appeared to be the biggest component (28%) for Thabou village, while packaging’s dominated waste composition in Kiat Ngong village. Interestingly, high percentage of golden apple shells waste were mismanaged. These had the potential to convert into value-added products such as calcium carbonate (CaCO3). It was found that fresh golden apple shells contained only 24.16±0.48 g/l as CaCO3, while incineration method increased higher CaCO3 products. The result showed that incineration at the temperature of 400 oC gave the highest amount of CaCO3 with the values of 1207.67±9.45 g/l as CaCO3. Based on the resources and the strength of the Ramsar site, the production of value added material from bio-waste could be integrated into waste management strategies along with 3Rs policies implementation.


2021 ◽  
Author(s):  
Giulliana Mondelli ◽  
Mariana Barbosa Juarez ◽  
Christiane Jacinto ◽  
Márcio Adilson de Oliveira ◽  
Lúcia Helena Gomes de Coelho ◽  
...  

Abstract This paper presents the characterization of municipal solid waste (MSW) randomly collected from two Material Recovery Facilities in São Paulo city, before (input - recyclables) and after (output - rejects) the sorting processes. Geo-environmental and geotechnical tests were performed on shredded samples and a digestion method was applied to detect the metals As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn concentrations using ICP OES. The objective was to assist future activities of integrated solid waste management and soil pollution. Results showed different particle sizes comparing the input (44.6%) and the output MSW (75.1%) passing through the 100 mm sieve. Organic matter and ash contents indicated the influence of inorganic carbon due to plastics' presence, with values varying between 6-13%. The pH values obtained were neutral and the electrical conductivity of the MSW rejects suggested a higher amount of ions, with values above 1000 µS/cm. Metals analyses show that Cd, Cu, Ni, Pb, and Zn are present in high concentrations, depending on the types of the materials. Standard Proctor compaction curves yielded maximum dry unit weight varying from 6.6 kN/m³ to 10.0 kN/m³ and optimum moisture contents from 20–42%. Cohesion ranged from 1.3 kPa to 31.3 kPa and friction angle from 3.2° and 42.9°. The results are comparable with those obtained for other countries using different MSW treatments and contribute to the data basis for MSW from the selective collection, aiming the integrated solid waste management, serving for other countries that adopt MSW sorting and recycling.


Author(s):  
Susan A. Thorneloe ◽  
Keith A. Weitz ◽  
Jesse Miller

The U.S. Environmental Protection Agency’s Office of Research and Development (US EPA ORD) has developed a “Municipal Solid Waste Decision Support Tool”, or MSW-DST, for local government solid waste managers to use for the life cycle evaluation of integrated solid waste management options. The MSW-DST was developed over a five year period (1994–1999) with the assistance of numerous outside contractors and organizations, including the Research Triangle Institute, North Carolina State University, the University of Wisconsin-Madison, the Environmental Research and Education Foundation, Franklin Associates and Roy F. Weston. The MSW-DST can be used to quantify and evaluate the following impacts for each integrated solid waste management alternative: • Energy consumption, • Air emissions, • Water pollutant discharges, • Solid Waste disposal impacts. Recently, the MSW-DST was used by the U.S. EPA to identify solid waste management strategies that would help to meet the goal of the EPA’s “Resource Conservation Challenge.” In this effort, ten solid waste management strategies were evaluated for a hypothetical, medium-sized U.S. community, with a population of 750,000 and a waste generation rate of approximately 3.5 pounds per person per day. (Table 1). The assumed waste composition was based on national averages. A peer-reviewed paper on this research was published in 2008 by the American Society of Mechanical Engineers (ASME).


Author(s):  
Kassahun Tassie ◽  
Birara Endalew ◽  
Anteneh Mulugeta

Municipal Solid Waste management is one of the most fundamental issues in the contemporary urban environments particularly in developing countries like Ethiopia. A huge generation of waste coupled with unbalanced waste management services is the major challenges facing the City of Addis Ababa. A continuous increase of production of more wastes and change in the composition of waste into complex, the waste management practice is challenged by low prioritization of waste management, limited revenues for financing waste management with the ever increasing population of this city. This retrospective study received documents from books, thesis works, annual waste management conference reports, journals on waste management, newsletters, abstracts and proceedings which can properly address the main factors that strongly hinder proper waste management and the extent to which community is aware of appropriate waste disposal systems in Addis Ababa city. The mechanism of Addis Ababa city Sanitation, Beautification and Park Development Authority to coordinate stakeholders has played a vital role in waste management. However, the daily monitoring of waste management by the community development section has not been sufficient because of poor governance where accountability, participation and transparency are lacking. It is also unauthorized solid waste dumping practice problem in different locations and has an effect on water sources and its resources. Effective involvement of both private and public sectors should improve waste management and provide door-to-door collection, street sweeping and facilitate drainage disposable canals. Therefore, an integrated solid waste management practice should be implemented for the City and also for the surrounding environment. As a result, strong political will, multi-sectoral approach, public awareness and participation, strategic planning, adequate funding and the adoption of Integrated Solid Waste Management is recommended SWM system required in Addis Ababa city.


2014 ◽  
Vol 46 (2) ◽  
pp. 187
Author(s):  
Sintha Prima Widowati

Many state-of-the-art concepts and technologies on managing MSW have been developed for years. However, in Indonesia, the practice may still be insufficient because of the institutional capacity issue. This study aimed to evaluate the integrated environmental management for municipal solid waste in Osaka City, Japan. Method in use was descriptive analysis by literature review using official document “Environmental Management in Osaka City for Fiscal Year 1999” by Osaka City Environmental Bureau. Result showed Osaka City was adopting and modifying the Integrated Solid Waste Management (ISWM) suggested by Tchobanoglous et al. [1993] hierarchically using “Waste Reduction Principles” and establishing “Environmental Management Bureau” to handle the integrated solid waste management practice. More importantly, the implementation of ISWM was completely supported by the central government by law which was The Waste Disposal and Public Cleaning Law and by regulation which was the task distribution among central, prefectural and municipal government in managing the solid waste. These approaches were proven to be effectively implemented from top to bottom level thus should be recommended to the government of Indonesia.


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