Construction and Evaluation of a Bituminous Roadway Constructed With Municipal Solid Waste Combustor Ash

2001 ◽  
Author(s):  
Samuel P. Lucido ◽  
Willard Wilson
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Structural Testing ◽  
Design Parameters ◽  
Water Runoff ◽  
Breathing Zone ◽  
Included Trial ◽  
Environmental Testing ◽  
The Road ◽  
Base Course

Abstract County State Aid Highway (CSAH) 13, located in Polk County Minnesota, was to be paved with 2.25 miles of new bituminous in October of 2000. Prior to the end of the 2000 construction season, a portion of one lane of the base course was installed, with the remainder to be completed in spring of 2001. The bituminous was amended with ash generated at the municipal solid waste combustor located in Fosston Minnesota. One third of the road was to be paved with traditional bituminous, one third was to be paved with bituminous in which a portion of the aggregate was replaced with “new” ash and one third was to be paved with bituminous in which a portion of the aggregate was replaced with “old” ash. “New” combustor ash is ash generated after the installation of an up-front materials recovery facility (MRF) and “old” combustor ash is ash generated before the installation of the MRF. Ash-amended bituminous was to be used in the base course and binder course of the pavement profile. Significant environmental and structural testing was performed prior to construction. Environmental and structural testing was also performed simultaneously with the construction process. Environmental testing completed in 2000 included: analysis of stack emissions from the bituminous plant, evaluation of breathing zone particulates at the bituminous plant, and analysis of surface water runoff from the ash-amended bituminous. Structural testing included trial mix design parameters. The road was also instrumented to collect water that may infiltrate through the ash-amended bituminous. Environmental testing to be completed in 2001 includes: evaluation of impacts to soils adjacent to the roadway and evaluation of infiltration water collected in the under-pavement collectors. Post-construction pavement testing is also to be completed in 2001. This paper presents the initial results of environmental and structural testing as well as construction issues.

scholarly journals Predicting the Quantity of Municipal Solid Waste Required for Power Generation Using Power Plant Design Parameters

2019 ◽  
Vol 1378 ◽  
pp. 032090
Author(s):  
R. A Ibikunle ◽  
I.F Titiladunayo ◽  
D. C Uguru-Okorie ◽  
C.O Osueke ◽  
A Olayanju
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Design Parameters ◽  
Plant Design

Use of cement-chelated, solidified, municipal solid waste incinerator (MSWI) fly ash for pavement material: mechanical and environmental evaluations

2017 ◽  
Vol 54 (11) ◽  
pp. 1553-1566 ◽  
Author(s):  
Qiang Tang ◽  
Yu Zhang ◽  
Yufeng Gao ◽  
Fan Gu
Keyword(s):  
Fly Ash ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Chelating Agent ◽  
Waste Incinerator ◽  
Curing Time ◽  
Mswi Fly Ash ◽  
Element Analysis ◽  
Base Course ◽  
Pavement Material

As a by-product from the incineration of municipal solid waste (MSW), fly ash usually contains mobile heavy metals that may engender severe pollution when reused. In this study, fly ash was solidified with cement and a chelating agent to immobilize these polluting elements. The possibility of using the solidified fly ash for pavement materials was also assessed through mechanical and environmental perspectives. According to the results, the strength of solidified fly ash was found proportional to both the cement/fly ash ratio and curing time. This indicated that the increase of fly ash loading reduced the concentration of products from cement hydration, and thus destroyed the structure of the products of hydration. With the increase of freeze–thaw cycles, the compressive strength of cement-stabilized fly ash decreased between days 7 and 14, and then increased between days 14 and 28. Subsequently, the finite element analysis showed that placing the solidified fly ash layer as a pavement material between an unbound base course and subgrade was beneficial to prolong fatigue life and reduce rutting distress of asphalt pavements. Finally, leachability of metals from the mixtures was tested, which showed that leaching concentration decreased as the cement/ash ratio, curing time, and chelating agent content increased.

Statistical modelling and assessment of landfill leachate emission from fresh municipal solid waste: A laboratory-scale anaerobic landfill simulation reactor study

2020 ◽  
Vol 38 (10) ◽  
pp. 1161-1175
Author(s):  
Chejarla Venkatesh Reddy ◽  
D Shekhar Rao ◽  
Ajay S Kalamdhad
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Weighted Average ◽  
Statistical Modelling ◽  
Design Parameters ◽  
Arid Zones ◽  
Waste Composition ◽  
Tropical Areas ◽  
Leachate Quality ◽  
Important Design

Quantification, measurement of quality, post-treatment, and leachate control has been a significant problem due to the dumping of waste in an unscientific manner across the globe, and especially in developing countries like India. In this context, the objective of this study was to investigate the degradation of fresh mixed municipal solid waste (MSW) in an anaerobic landfill reactor operated with rainfall addition in laboratory conditions. Experiments were carried out in a landfill reactor of 1 m length × 1 m width × 1.1 m height. The reactor was simulated with 50 years weighted average actual rainfall rate of India. It contained the waste composition of 73% wet waste (food and kitchen) and 27% dry waste (paper, plastic, wood, textiles, and others). The leachate parameters were continually monitored for 39 weeks. In the fresh MSW landfill reactor it was evident that concentrations of leachate parameters were high initially, and there was a significant decrease in BOD5 (7041–39310 mg L−1), COD (15692–71630 mg L−1) and TS (9077–33200 mg L−1) in leachate. Therefore, rainfall had a direct influence on leachate quality. The developed first-order decay models were used for BOD5, COD, and total solids with adjusted R2 of 0.83, 0.92, and 0.96, respectively. Therefore, this model can be applied for leachate strength estimation at any given time from the period of deposition of waste under similar rainfall and waste compositions, and is largely applicable in India and tropical areas. This study is expected to be a good simulation for cities with the waste composition of high wet waste (>70%) as the estimations of important design parameters such as BOD5, COD, VFA, and NH4+-N were studied in this research. As the importance of moisture (precipitation) has been established in this study, some moisture additions can be designed in areas with low rainfall, such as arid zones.

scholarly journals Thermo-economic Analysis of a Retrofit Small Scale Municipal Solid Waste Power Plant

2018 ◽  
Vol 3 (3) ◽  
pp. 1
Author(s):  
Barinyima Nkoi ◽  
Confidence Koate ◽  
Howells Idaerefagha Hart
Keyword(s):  
Power Plant ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Saturation Pressure ◽  
Design Parameters ◽  
Economic Evaluations ◽  
Small Scale ◽  
Software Modeling ◽  
Port Harcourt ◽  
Rivers State

This paper evaluates the thermo-economics of a retrofit small scale municipal solid waste (MSW)-fueled power plant in Port Harcourt, Rivers State, Nigeria. The design parameters for the combustion chamber which utilizes mass combustion in stoker crate furnace is operated at steam saturation pressure of 38.2bar, with fuel consumption rate of 41.3tonnes/hr (11.88kg/s) and was selected for the amount of MSW generated in Port Harcourt metropolis. The data used to assess the availability of the fuel (MSW) were obtained from waste dumpsites controlled by Rivers State Waste Management Agency (RIWAMA). MATLAB Software modeling was used for the thermodynamic analysis to appropriately retrofit a steam turbine to the selected combustor and the result show that the optimal performance of the proposed MSW plant gives a net power output of 5.23MW.  The result further shows that heat in the steam entering the turbine is equivalent to 0.71MWh per tonnes of waste. Therefore, at 17.3% thermal efficiency of the proposed MSW plant, 0.13 MWh of electricity will be produced per tonnes of waste combusted. However, it is estimated that the plant may consume 15% of the electricity, which implies that 0.11MWh/tonne will be exported to the grid. Thus, as the plant is expected to process 340770.3tonnes/yr of MSW, the net electricity output of the proposed plant is estimated at 37.48GWh per year. The economic evaluations have shown that the Net present worth of the plant is $6395107.07 with a payback period of 7years for a 20years life cycle. This work thus indicates huge potentials in generating electrical energy and wealth from MSW in Port Harcourt and beyond with the use of cheap and readily available fuel from municipal solid waste.

Waste Combustor Ash Utilization

2009 ◽  
Author(s):  
Willard Wilson
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
The United States ◽  
Worker Safety ◽  
Partial Replacement ◽  
Safety Issues ◽  
Polk County ◽  
Base Course ◽  
Paved Road ◽  
Road Paving

The incorporation of municipal solid waste combustor (MWC) ash into bituminous pavements has been investigated in the United States since the middle 1970s. Thus far, most, if not all of these projects, have attempted to answer the questions: Is it safe? Is it feasible? Or does it provide an acceptable product? Polk County Solid Waste located in Northwest Minnesota has now completed three Demonstration Research Projects (DRP) utilizing ash from its municipal solid waste combustor as a partial replacement of aggregate in asphalt road paving projects. The results of these projects show no negative environmental or worker safety issues, and demonstrate improved structural performance and greater flexibility from the ash-amended asphalt as compared to conventional asphalt. Polk County has submitted an application to the Minnesota Pollution Control Agency (MPCA) to obtain a Case-Specific Beneficial Use Determination (CSBUD), which would allow for continued use of ash in road paving projects without prior MPCA approval. However, concerns from the MPCA Air Quality Division regarding a slight increase in mercury emissions during ash amended asphalt production has resulted in a delay in receiving the CSBUD. Polk County decided to take a different approach. In January 2008, Polk submitted and received approval for their fourth ash utilization DRP. This DRP differs from the first three in that the ash will be used as a component in the Class 5 gravel materials to be used for a Polk County Highway Department road rebuilding project. The project involves a 7.5 mile section of County State Aid Highway (CSAH) 41, which conveniently is located about 10 miles south of the Polk County Landfill, where the ash is stored. The CSAH 41 project includes the complete rebuilding and widening of an existing 7.5 mile paved road section. Ash amended Class 5 gravel would be used in the base course under the asphalt paving, and also in the widening and shouldering sections of the road. The top 2 inches of the widening and shouldering areas would be covered with virgin Class 5 and top soil, so that all ash amended materials would be encapsulated. This has been the procedure followed in previous projects. No ash will be used in the asphalt mix for this project. This paper discusses production, cost, performance and environmental issues associated with this 2008 demonstration research project.

Geometrical Design Of Stand Pipe Air Distributors For The Combustion Of Municipal Solid Waste In A Fluidised Bed

2012 ◽  
Author(s):  
Anwar Johari ◽  
H. Hashim ◽  
M. Rozainee
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Fluidized Bed ◽  
Design Parameters ◽  
Fluidised Bed ◽  
Geometrical Design ◽  
Maintenance Work ◽  
Stable Fluidization ◽  
Experimental Rig ◽  
Orifice Size

Reka bentuk geometri bagi penyalur udara untuk pembakaran sisa buangan sampah perbandaran telah dihasilkan. Reka bentuk baru ini membolehkan bahan tidak terbakar dikeluarkan dengan mudah melalui ruang antara penyalur udara. Turus terbendalir dihasilkan menggunakan turus Perspex di mana udara disalurkan melalui penyalur udara di bawahnya. Untuk mendapatkan reka bentuk geometri yang sesuai, beberapa parameter reka bentuk telah dikaji. Kesan saiz bukaan, kesan jarak antara antara bukaan dan kesan jarak antara penyalur udara telah dikaji untuk mendapatkan reka bentuk geometri yang paling sesuai dan berdasarkan kepada kualiti perbendaliran di dalam turus terbendalir. Saiz bukaan yang dikaji adalah 1.5 mm, 2 mm, 3 mm dan 5 mm. Hasil kajian menunjukkan bukaan 3 mm menghasilkan kualiti perbendaliran yang stabil. Jarak antara bukaan yang dikaji adalah 10 mm, 20 mm, 30 mm dan 40 mm dan didapati buih udara yang terhasil adalah stabil apabila menggunakan jarak antara bukaan 10 mm. Jarak antara penyalur udara yang dikaji adalah 30 mm, 40 mm, 50 mm, 60 mm dan 70 mm. Hasil kajian menunjukkan jarak terbaik dari segi kestabilan buih udara bagi penyalur udara adalah 70 mm. Kata kunci: Penyalur udara; turus terbendalir; saiz bukaan; jarak antara bukaan; jarak penyalur udara The new geometrical design of stand–pipe air distributor for the combustion of the municipal solid waste was presented. The new design of the air distributors enables penetration of incombustible and unburnt carbon through opening between the air distributors, thus providing easy maintenance work. The fluidized bed experimental rig was constructed using Perspex column in which air was supplied through the distributors below it. In order to establish the final geometrical design of the air distributors, several design parameters were investigated. The effect of orifice size, distance between orifice and distance between distributor pipes on the fluidization behaviour were studied. Investigation on the effects of various orifice sizes of 1.5 mm, 2 mm, 3 mm, 4 mm and 5 mm showed that the 3 mm orifice size exhibited the most stable fluidization behaviour. Investigation on some selected orifice distances of 10 mm, 20 mm, 30 mm and 40 mm also found that the 10 mm orifice distance exhibited stable growths of bubbles. Various pipe distances of 30 mm, 40 mm, 50 mm, 60 mm and 70 mm were also investigated and the most suitable pipe distance was 70 mm. Key words: Air distributor; fluidized bed; orifice size; orifice distance; pipe distance

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