Download or read book Dynamic Characteristics and Stability Analysis of Municipal Solid Waste in Bioreactor Landfills written by Mohamed Adil Haque and published by ProQuest. This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Earth Retaining Structures and Stability Analysis written by Kasinathan Muthukkumaran and published by Springer Nature. This book was released on 2023-02-14 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Proceedings of the Indian Geotechnical Conference 2022 Volume 8 written by Babu T. Jose and published by Springer Nature. This book was released on with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation and Environmental Geotechnics written by Kasinathan Muthukkumaran and published by Springer Nature. This book was released on 2022-12-10 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Site Investigation using Resistivity Imaging written by Sahadat Hossain and published by CRC Press. This book was released on 2018-08-06 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhanced stabilisation of municipal solid waste in bioreactor landfills written by Roberto Valencia Vazquez and published by CRC Press. This book was released on 2008-12-01 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Municipal Solid Waste in Bioreactor Landfills written by Dounia El Khatib and published by . This book was released on 2010 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Geotechnics of Waste Fills written by Arvid Landva and published by ASTM International. This book was released on 1990 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Static and Dynamic Properties of Municipal Solid waste written by Dimitrios Pavlos Zeccos and published by . This book was released on 2005 with total page 1242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Properties of Municipal Solid Waste Landfills for Site Response Analyses written by Glenn J. Rix and published by . This book was released on 1999 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landfill aeration written by Rainer Stegmann and published by . This book was released on 2007 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Stability of Sanitary Landfills written by BJ. Murphy and published by . This book was released on 1990 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: In most of the major U.S. cities, both the capacity and availability of solid waste landfill sites are declining. One option for increasing landfill capacity has been to build landfills to greater heights and new sites are being planned to store refuse to unprecedented heights. This situation has raised concerns by many state and federal regulators regarding the stability of high refuse fill under static and dynamic loading conditions. This paper includes: ? a critical evaluation of the published and unpublished studies on the shear strength properties of refuse and settlement characteristics of refuse fills. ? a discussion of the inadequacy of the Mohr-Coulomb theory to account for the large, yet non catastrophic deformations that refuse undergoes. ? a presentation of a new approach to stability analysis based on the bearing capacity and settlement criteria of landfills ? an examination of the dynamic strength properties of refuse fills, including recently reported field shear wave data and a deformation analysis approach for evaluating stability when earthquake motions pass through a high landfill.
Download or read book Geoenvironmental Practices and Sustainability written by G.L. Sivakumar Babu and published by Springer. This book was released on 2017-06-05 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a compilation on issues related to sustainable practices in geo-environmental engineering, particularly as applying to developing nations such as India. While, the developed world has already developed some solutions such as landfills, developments in landfills, barriers and liners in the North America and waste-to-energy and waste incineration in Europe, developing countries like India are trying to figure out ways which suit the present condition without compromising the future needs and comforts. This volume presents case studies on the various problems and solutions adopted for different sites. Although a common approach for all the problems is not feasible or recommend, this collection aims to provide a compendium on the current efforts underway and to help achieve common ground for the practitioners and researchers involved. The works included here give insight to the possible development of resilient and sustainable structures (like offshore wind turbines) and energy geotechnics. The book covers topics such as liners and barrier systems, use of recycled and waste materials, waste management and hazard assessment, sustainable infrastructure, and sustainability and the environment. The contents of this book will be useful to researchers and professionals working in geo-environmental engineering. The book will also be useful to policy makers interested in understanding geotechnical concerns related to sustainable development.
Download or read book Sustainable Practices for Landfill Design and Operation written by Timothy G. Townsend and published by Springer. This book was released on 2015-07-16 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid waste management is a global concern, and landfilling remains the predominant management method in most areas of the world. This book provides a comprehensive view of state-of-the-art methods to manage landfills more sustainably, drawing upon more than two decades of research, design, and operational experiences at operating sites across the world. Sustainable landfills implement one or multiple technologies to control and enhance the degradation of waste materials to realize a multitude of potential benefits during or shortly after the landfill’s operating phase. This book presents detailed approaches in the development, design, operation, and monitoring of sustainable landfills. Case studies showcasing the benefits and challenges of sustainable landfill technologies are also provided to give the reader additional context. The intent of the book is to serve as a reference guide for regulatory personnel, a practical tool for designers and engineers to build on for site-specific applications of sustainable landfill technologies, and a comprehensive resource for researchers who are continuing to explore new and better ways to more sustainably manage waste materials.
Download or read book Comparative Study of Biodegradation of Municipal Solid Waste in Simulated Aerobic and Anaerobic Bioreactor Landfills written by Septa Rendra and published by . This book was released on 2007 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomethanization of the Organic Fraction of Municipal Solid Wastes written by J. Mata-Alvarez and published by IWA Publishing. This book was released on 2002-08-31 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomethanization of the Organic Fraction of Municipal Solid Wastes is a comprehensive introduction to both the fundamentals and the more practical aspects of the anaerobic digestion of organic solid wastes, particularly those derived from households, that is, the organic fraction of municipal solid wastes (OFMSW). It can be used as a textbook for specialized courses and also as a guide for practitioners. In the first part, the book covers the relevant aspects of anaerobic digestion (AD) of organic wastes. The fundamentals and kinetic aspects of AD are reviewed with particular emphasis on the aspects related to solid wastes. This introduction is necessary to have a comprehensive view of the AD process and to understand the practical principles as well as the origin of possible problems arising from the management of the process. Chapter 2 emphasizes the role of kinetics in designing the reactor, paying special attention to existing models, particularly the dynamic ones. Through this introduction, it is intended to facilitate the technology transfer from laboratory or pilot plant experiences to full-scale process, in order to implement improvements in current digesters. Laboratory methods are described for the analysis and optimization of reactor performance, such as methanogenic activity tests or experimental evaluation of the biodegradation kinetics of solid organic waste. The different reaction patterns applied to industrial reactors are outlined. Industrial reactors are classified in accordance with the system they use, pointing out advantages and limitations. Co-digestion, enabling the co-treatment of organic wastes of different origin in a more economically feasible way, is described in detail. Examples of co-digestion are given, with OFMSW as a base-substrate. Finally, full-scale co-digestion plants are discussed. Various types (mechanical, biological, physico-chemical) of pre-treatment to increase the biodegradability, and thus the yields of the process, are reviewed in detail. The use of the fermentation products of anaerobic digesters for biological nutrient removal processes in wastewater treatment plants is described. This constitutes an example of integrated waste management, a field in which both economic and technical advances can be achieved. Balances are given to justify the approach, and a full-scale case study is presented. The important topic of economics and the ecological advantages of the process are emphasized. The use of compost, the integration with composting technology, and advantages over other technologies are detailed in the framework of an environmental impact assessment of biowaste treatment. Finally, the anaerobic digestion of MSW in landfills is reviewed in detail, with emphasis on landfill process enhancement and strategies for its application.
