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Modelling Of Clogging In Laboratory Column Experiments Conducted With Synthetic Landfill Leachate
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Author :Andrew J. Cooke Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612285545 Total Pages :253 pages Book Rating :4.2/5 (855 download)
Book Synopsis Modelling of Clogging in Laboratory Column Experiments Conducted with Synthetic Landfill Leachate [microform] by : Andrew J. Cooke
Download or read book Modelling of Clogging in Laboratory Column Experiments Conducted with Synthetic Landfill Leachate [microform] written by Andrew J. Cooke and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1997 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical model has been developed for predicting the rate of clogging in column experiments conducted using synthetic landfill leachate as part of a broader study of the clogging processes occurring in landfill leachate collection systems. Consideration is given to biological growth and biochemically driven mineral precipitation. The model represents the porous media flow system as a collection of elements in which each element acts as a separate, fixed film reactor. By applying biological process and geotechnical engineering concepts to the system, the model predicts the substrate utilization, growth and decay of biofilm, and accumulation of inert biomass and calcium carbonate on the porous media at any time, or position, along the length of the column. The model is applied to two series of experiments and is shown to be successful in predicting substrate removal, biofilm thickness and porosity.
Book Synopsis Modelling of Clogging in Laboratory Column Experiments Conducted with Synthetic Landfill Leachate by :
Download or read book Modelling of Clogging in Laboratory Column Experiments Conducted with Synthetic Landfill Leachate written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Geotechnical Journal written by and published by . This book was released on 2008 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microbial Ecology of Biofilms by : Bruce E. Rittmann
Download or read book Microbial Ecology of Biofilms written by Bruce E. Rittmann and published by IWA Publishing (International Water Assoc). This book was released on 1999 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biofilms are ubiquitous, yet until recently scientists and engineers involved in biofilm research or application had a severely limited insight into the structure and functioning of biofilms on a microbial level. However the past decade has seen an explosion of new techniques to elucidate the structure and functions of biofilms, e.g. molecular probes, microsensors, scanning electron microscopy, and a new generation of mathematical models. The 35 contributions selected for these proceedings after peer review reflect these developments with papers grouped into the following themes: nutrient removal systems; anaerobic systems; biofilm physical structure and aerobic water treatment; multidimensional modelling; detoxification of hazardous chemicals; and transport processes in and to the biofilm. The proceedings provide a unique panorama of the latest scientific tools, the emerging new concepts and the widespread applications that are making microbial ecology of biofilms such an exciting field. These genuinely state-of-the-art papers lay foundations for great progress in the next century.
Book Synopsis Modelling MSW Leachate Characteristics and Clogging by : Yan Yu
Download or read book Modelling MSW Leachate Characteristics and Clogging written by Yan Yu and published by . This book was released on 2012 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical model (BioClog) is developed to examine changes in key municipal solid waste (MSW) leachate characteristics and the porosity of porous media (clogging) as the leachate passes through the drainage layer of a leachate collection system (LCS). The model considers multiple-species reactive leachate transport through porous media. It simulates biofilm growth and loss, deposition of suspended particles, and precipitation of minerals on the surface of porous media. It is used to examine the long-term performance of both the granular porous media and nonwoven geotextiles in LCSs. Modelling of laboratory mesocosm cells filled with gravel usually used in landfills and permeated by landfill leachate shows encouraging agreement between the observed and measured effluent chemical oxygen demand (COD) and calcium concentrations as well as the gravel porosity within the saturated drainage layers. Studies of early generation LCSs involving finger (French) drain systems show that the finger drains are not effective at controlling leachate mounding within the landfill and the calculated leachate mound thicknesses agree well with observed field data. A numerical examination of the recent generation of LCSs, comprised of the granular drainage blanket and perforated drainage pipes, shows that an increase in grain size increases the service life and that increasing the spacing between collection pipes (i.e., the drainage path) decreases the service life of LCSs. Filter-separator layers between the waste and granular drainage layers are shown to increase the service life of LCSs. The modelling results indicate that the calculated clog mass within the saturated drainage layer is dominated by the inorganic material and the calculated service life of LCSs is dependent on the leachate strength examined. Finally, a new practical model for estimating the service life of LCSs is developed and calibrated against the data from the BioClog model. The simplified model could be used by the practicing engineers for estimating the service life and optimizing the design of LCSs in MSW landfills.
Book Synopsis Modelling the Clogging of Landfill Leachate Collection Systems by : Andrew J. Cooke
Download or read book Modelling the Clogging of Landfill Leachate Collection Systems written by Andrew J. Cooke and published by . This book was released on 2007 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Occurrence and Remediation of Pipe Clogging in Landfill Leachate Recirculation Systems by : Stanislaw Lozecznik
Download or read book Occurrence and Remediation of Pipe Clogging in Landfill Leachate Recirculation Systems written by Stanislaw Lozecznik and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the changes in leachate composition and clogging evolution in leachate transmission pipes and the use of methanogenesis as a leachate treatment alternative for Bioreactor landfills, by using pilot-scale and laboratory studies. The pilot-scale study consisted of a research station built at Brady Road Landfill, housing sixteen HDPE pipes of three different diameters, conveying leachate intermittently at eight different Reynolds numbers, under reasonably controlled conditions. The pipes were tested for leachate degradation, clogging evolution and hydraulic impairment over time. The laboratory studies carried out tested (1) the effect of turbulence intensity and temperature on leachate degradation and clogging effects and (2) biological pretreatment of leachate prior to injection into a bioreactor cell. The pilot study results showed that under the conditions tested, pipes developed a significant amount of organic and inorganic clog material in less than a year of operation. Since limited quantities of fresh leachate (approx. 3 m3) were used during each leachate degradation analyses, the anticipated effects of clogging in a full scale injection system are expected to be more pronounced, which can negatively impact the long-term hydraulic performance, operation, and service life of a Bioreactor Landfill. The first laboratory study showed that increasing the turbulent energy dissipation rate caused greater amounts of CO2 evolution from the leachate, and temperature increase had an impact on dissolved Ca2+ under atmospheric conditions, affecting clog development. The second and third laboratory studies showed that performing leachate methanogenesis reduces organic (COD, VFA) and inorganic (Ca2+, ISS) clog constituents within the leachate However, the rate of methanogenesis was influenced by the ratio of acetate and propionate. It is suggested that if leachate undergoes methanogenesis in a separate leachate digester prior to re-injection into a bioreactor waste cell, it may protect the pipes and other engineered landfill systems against clogging and its detrimental effects, while allowing for CH4 recovery. However, blending of leachates from different wells or cells prior to the methanogenic digester may be needed to balance the variable concentrations and ratios of acetate and propionate over time from different landfill wells and cells.
Author :Andrew J. Cooke Publisher :London : Geotechnical Research Centre, University of Western Ontario ISBN 13 : Total Pages :24 pages Book Rating :4.:/5 (459 download)
Book Synopsis Evaluating the Relationships Between Biofilm Growth and Mineral Precipitation in Column Experiments Conducted Using Synthetic Leachate by : Andrew J. Cooke
Download or read book Evaluating the Relationships Between Biofilm Growth and Mineral Precipitation in Column Experiments Conducted Using Synthetic Leachate written by Andrew J. Cooke and published by London : Geotechnical Research Centre, University of Western Ontario. This book was released on 2000 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of the Performance of Engineered Waste Containment Barriers by : National Research Council
Download or read book Assessment of the Performance of Engineered Waste Containment Barriers written by National Research Council and published by National Academies Press. This book was released on 2007-09-22 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: President Carter's 1980 declaration of a state of emergency at Love Canal, New York, recognized that residents' health had been affected by nearby chemical waste sites. The Resource Conservation and Recovery Act, enacted in 1976, ushered in a new era of waste management disposal designed to protect the public from harm. It required that modern waste containment systems use "engineered" barriers designed to isolate hazardous and toxic wastes and prevent them from seeping into the environment. These containment systems are now employed at thousands of waste sites around the United States, and their effectiveness must be continually monitored. Assessment of the Performance of Engineered Waste Containment Barriers assesses the performance of waste containment barriers to date. Existing data suggest that waste containment systems with liners and covers, when constructed and maintained in accordance with current regulations, are performing well thus far. However, they have not been in existence long enough to assess long-term (postclosure) performance, which may extend for hundreds of years. The book makes recommendations on how to improve future assessments and increase confidence in predictions of barrier system performance which will be of interest to policy makers, environmental interest groups, industrial waste producers, and industrial waste management industry.
Download or read book Soil Screening Guidance written by and published by . This book was released on 1996 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Leachate from Municipal Landfills by : James C. S. Lu
Download or read book Leachate from Municipal Landfills written by James C. S. Lu and published by . This book was released on 1985 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Construction, and Evaluation of Clay Liners for Waste Management Facilities by : L. J. Goldman
Download or read book Design, Construction, and Evaluation of Clay Liners for Waste Management Facilities written by L. J. Goldman and published by . This book was released on 1988 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Harmonization of Leaching/Extraction Tests by : L. Heasman
Download or read book Harmonization of Leaching/Extraction Tests written by L. Heasman and published by Elsevier. This book was released on 1997-06-10 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a unique compilation on the use of leaching/extraction methods in different fields. The use of leaching test methods is increasing in various areas including: waste treatment and disposal; incineration of waste; soil clean-up and reuse of cleaned soil; sludge treatment. This has led to (and may increasingly lead to) the development of a large number of very similar tests in these different fields. However, these developments are taking place with no clear understanding of their mutual relationships. In view of these developments, efforts are needed to harmonize the leaching procedures that could be adapted for different matrices, as well as validate the use of existing tests in other fields. The development of a wide variety of leaching/extraction tests for different matrices is undesirable from a regulatory point of view and undesirable for industry. Clarity in testing is crucial in producer-consumer relations. This collective document will assist in improving the understanding of leaching from a variety of sources and will, where appropriate, help to bring together the approaches used in different technical fields and in different countries.
Book Synopsis The Utilization of Slag in Civil Infrastructure Construction by : George C. Wang
Download or read book The Utilization of Slag in Civil Infrastructure Construction written by George C. Wang and published by Woodhead Publishing. This book was released on 2016-06-24 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Utilization of Slag in Civil Infrastructure Construction strives to integrate the theory, research, and practice of slag utilization, including the production and processing of slags. The topics covered include: production and smelting processes for metals; chemical and physical properties of slags; pretreatment and post-treatment technology to enhance slag properties; potential environmental impact; mechanisms of potential expansion; special testing methods and characteristics; slag processing for aggregate and cementitious applications; suitability of slags for use in specific applications; overall properties of materials containing slags; and commercialization and economics. The focus of the book is on slag utilization technology, with a review of the basic properties and an exploration of how its use in the end product will be technically sound, environment-friendly, and economic. Covers the production, processing, and utilization of a broad range of ferrous, non-ferrous, and non-metallurgical slags Provides information on applicable methods for a particular slag and its utilization to reduce potential environmental impacts and promote natural resource sustainability Presents the overall technology of transferring a slag from the waste stream into a useful materials resource Provides a detailed review of the appropriate utilization of each slag from processing right through to aggregate and cementitious use requirements
Book Synopsis Municipal Solid Waste Incinerator Residues by : A.J. Chandler
Download or read book Municipal Solid Waste Incinerator Residues written by A.J. Chandler and published by Elsevier. This book was released on 1997-04-09 with total page 1009 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text covers a broad spectrum of topics pertinent to the management of incinerator residues. Background information includes a history of incineration, and the influence of municipal waste composition, incinerator type air pollution control technologies on residue quality. Physical, chemical and leaching characteristics for the various ash streams are described, along with recommended sampling and evaluation methodologies. Residue handling and management options, including, treatment utilisation and disposal are also discussed in detail.
Book Synopsis Lining of Waste Impoundment and Disposal Facilities by :
Download or read book Lining of Waste Impoundment and Disposal Facilities written by and published by . This book was released on 1980 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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