[PDF] Dynamic Characteristics And Stability Analysis Of Municipal Solid Waste In Bioreactor Landfills eBook

Author : Mohamed Adil Haque
Publisher : ProQuest
Page : pages
File Size : 14,2 MB
Release : 2007
Category : Civil engineering
ISBN : 9780549138136

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Bioreactor landfills are operated to enhance refuse decomposition, gas production, and waste stabilization. The major aspect of bioreactor landfill operation is the recirculation of generated leachate back through the refuse mass. Due to the accelerated decomposition and settlement of solid waste, bioreactor landfills are gaining popularity as an alternative to the conventional landfill designed under Subtitle D regulations. However, recirculation of leachate or addition of water to accelerate the waste decomposition changes the biodegradation and geotechnical characteristics of waste mass. Our understanding of changes in engineering characteristics of solid waste with accelerated decomposition is limited. There is a need to understand and explain the changes in characteristics associated with stability analysis of landfills. The objective of this research is to study the changes in strength characteristics of municipal solid waste (MSW) in bioreactor landfills with time and decomposition. In order to understand the changes in strength properties of MSW in bioreactor landfills with time and decomposition an experimental program was developed. Eight small scale reactors, representative of bioreactor landfill, were built in laboratory, and samples were prepared to represent different phases of decomposition. The state of decomposition was quantified by methane yield, pH, and volatile solids. The geotechnical testing program (CD triaxial test and resonant column tests) was performed to determine shear strength and dynamic characteristics of MSW in bioreactor landfill. The test results indicated that the measured shear strength and dynamic properties of MSW are significantly affected by the degree of decomposition. The friction angle of MSW decreased from 26.7° in Phase I to 19° in Phase IV. The shear modulus increased from 2.11 MPa in Phase I to 12.56 MPa in Phase IV. The change in shear strength and dynamic properties of MSW was attributed to the breakdown in fibrous nature of solid waste particles with degradation. Based on the measured experimental results, stability analyses were conducted. The finite element program PLAXIS and limit equilibrium program STABL was used to analyze the stability of MSW in bioreactor landfills. The stability was evaluated at both under normal and those during earthquake conditions. The factor of safety estimated using PLAXIS and GSTABL under both the conditions decreased as the solid waste degraded with time. The results indicates that the stability of bioreactor landfills should be evaluated using the strength characteristics determined as a function of time and decomposition rather than using average values.

Author : Kasinathan Muthukkumaran
Publisher : Springer Nature
Page : 466 pages
File Size : 39,93 MB
Release : 2023-02-14
Category : Science
ISBN : 9811972451

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This book comprises the select peer-reviewed proceedings of the Indian Geotechnical Conference (IGC) 2021. The contents focus on Geotechnics for Infrastructure Development and Innovative Applications. This book covers topics geotechnical challenges in tunnel construction, related performance of temporary secant pile wall, soil nail walls, rock-fill embankment dams, performance of MSE wall, stability analysis, dynamic stability and landslide simulations, landslide early warning system, among others. This book is of interest to those in academia and industry. This book is of interest to those in academia and industry.

Author : Kasinathan Muthukkumaran
Publisher : Springer Nature
Page : 382 pages
File Size : 32,15 MB
Release : 2022-12-10
Category : Technology & Engineering
ISBN : 9811967741

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This book comprises the select peer-reviewed proceedings of the Indian Geotechnical Conference (IGC) 2021. The contents focus on Geotechnics for Infrastructure Development and Innovative Applications. This book covers topics related application of natural and artificial geosynthetics in shallow foundation bearing capacity enhancement, highway & railway pavements, high speed rail and geo-environmental applications. Topics also covered related to simulation of geosynthetic encased stone column, application of geosynthetic for ground improvement, pore size distribution of compacted expansive soils, MICP, landfills, among others. This book is of interest to those in academia and industry.

Author : Sahadat Hossain
Publisher : CRC Press
Page : 232 pages
File Size : 29,30 MB
Release : 2018-08-06
Category : Science
ISBN : 1351047590

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Subsurface investigation is the most important phase of any civil engineering construction or development activities. The geologic conditions can be extremely complex, variable, and subject to change with time; soil test borings and in-situ tests are employed to obtain subsoil information. Resistivity Imaging (RI) is a non-destructive, fast and cost-effective method of site investigation and soil characterization. Site Investigation using Resistivity Imaging aims to summarize pertinent details of RI in site investigation for geotechnical and geo-environmental applications. It aims to bridge the gap that currently exists between the geotechnical/geo-environmental and geophysical engineering community. The geotechnical and geo-environmental engineers will be able to use annd understand geophysical data and utilize the information for their design. Features: First comprehensive handbook aimed at engineers that summarises pertinent details of Resitivity Imaging (RI) in site investigation for geotechnical and geo-environmental applications. for geotechnical and geoenvironmental engineers, making it possible to interpret geophysical data and utilize the information for their design. explanining the advantages of RI over conventional site investigations: continuous image, large coverage, low cost, quick and easy data processing. It will be a comprehensive handbook for the application of RI in geotechnical and geo-environmental site investigations.

Author : Roberto Valencia Vazquez
Publisher : CRC Press
Page : 159 pages
File Size : 30,64 MB
Release : 2008-12-01
Category : Nature
ISBN : 1439828377

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Municipal solid waste entombed in landfills will produce pollution in the form of landfill gas and leachate when the barriers fail in the long term. Bioreactor landfills are an alternative solution to avoid such negative impacts and to achieve a more stable residue, the so-called Final Storage Quality (FSQ) of residues. However, until now the main

Author : Dounia El Khatib
Publisher :
Page : 136 pages
File Size : 42,40 MB
Release : 2010
Category :
ISBN :

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Bioreactor landfills allow a more active landfill management that recognizes the biological, chemical and physical processes involved in a landfill environment. The bioreactor landfill provides control and process optimization, primarily through the addition of leachate or other liquid amendments. This research presents an analysis of leachate, gas and solid parameters data collected during the Acid Formation Phase of anaerobic solid waste decomposition in simulated bioreactor landfills. The main focus of the study is the analysis of the effect of temperature on solid waste decomposition in bioreactor landfills. In accordance with this objective, three simulated landfill bioreactors were designed and constructed at the EPA Center Hill Facility. Two of the lysimeters were operating at a normal temperature of 37oC and the third was operating at high temperature (60oC). The lysimeters were filled with synthetic municipal solid waste (MSW) material prepared at the site, typical to the landfill composition waste generated in the USA, and reported by U.S. EPA 2008. In the first part of this study, the results of the indicator parameters are analyzed to quantify the effect of temperature on the waste degradation in bioreactor landfills. Tables and graphical representation of the data are provided for each of the three lysimeters, and compared in order to study the variation of biodegradation of MSW according to the temperature. In the second part of the study, landfill settlement has been studied in order to predict the settlement in bioreactor landfills. Prediction of landfill settlement is one of the important parameters that affect the design and maintenance of bioreactor landfills. Settlement is known to be a function of many factors (i.e. moisture, density, type of waste etc.); therefore, large number of variables is involved in the settlement mechanism. In this work, a biodegradation settlement model incorporating two parameters (A and B) was developed. In addition, an empirical check of the settlement model was studied, using an exponential function to fit the settlement.

Author : Amy Alexander
Publisher : DIANE Publishing
Page : 36 pages
File Size : 35,28 MB
Release : 2003
Category : Bioreactor landfills
ISBN : 1428904530

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Presents two example mass balance calculations for estimating whether the moisture content of the waste mass in a bioreactor landfill is above or below 40 percent, within the requirements of the landfills NESHAP.

Author : Roberto Valencia Vázquez
Publisher :
Page : 141 pages
File Size : 14,31 MB
Release : 2008
Category : Bioreactor landfills
ISBN : 9789085049180

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This thesis focused on the interaction and modification of the factors controlling the waste stabilisation process in a bioreactor landfill. The results revealed that biological stabilisation can be achieved. In conclusion, this research reduced our current gaps-in-knowledge and offered feasible technical alternatives to control and steer the processes occurring in a bioreactor landfill.