Increased Linear Transport Velocity Of Bacteria Through Porous Media
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Increased Linear Transport Velocity Of Bacteria Through Porous Media
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Author : Kevin L. Long
language : en
Publisher:
Release Date : 2000
Increased Linear Transport Velocity Of Bacteria Through Porous Media written by Kevin L. Long and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Bio Colloidal Transfer In Saturated And Unsaturated Porous Media
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Author : Hongjuan Bai
language : en
Publisher:
Release Date : 2017
Bio Colloidal Transfer In Saturated And Unsaturated Porous Media written by Hongjuan Bai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
The investigation of the transport and retention of bacteria in porous media has a great practical importance in environmental applications, such as protection of the surface and groundwater supplies from contamination, risk assessment from microorganisms in groundwater, and soil bioremediation. The aim of this study is to gain a fundamental understanding of the mechanisms that control bacteria transport and deposition in saturated and unsaturated porous media. Laboratory tracer and bacteria transport experiments at Darcy scale were performed in three porous media with distinct pore size distribution in order to investigate and quantify water and bacteria transport process under steady state flow conditions. A conservative solute was used as water tracer to characterize water flow pathways through porous media. A gram negative, motile Escherichia coli, a gram negative, non-motile Klebsiella sp. and a gram positive, non-motile R. rhodochrous were selected for the transport experiments. Characterization of cell properties (such as cell size and shape, zeta potential, motility and hydrophobicity) was performed for each strain. Numerical simulations with HYDRUS-1D code were performed to characterize water flow and to estimate bacteria transport and deposition parameters. The later were explored to identify bacteria flow patterns and physicochemical or physical mechanisms involved in bacteria deposition. To provide a better understanding of the mechanisms involved on bacteria transport and deposition, pore scale experiments were carried out by using microfluidic devices, designed for this purpose. The information obtained from laboratory experiments and numerical modeling was improved by theoretical calculation of different interactions between bacteria and porous media at air/water/solid interfaces. DLVO and non-DLVO interactions such as hydrophobic, steric, capillary and hydrodynamic forces involved in bacteria deposition were considered to describe bacteria-interface interactions in order to identify their relative impact on physicochemical and physical deposition of bacteria. Results obtained through both laboratory experiments and numerical simulationsoutlined non-uniform flow pathways, which were dependent on both grain/pore size as well as pore size distribution of the porous media. For a given porous medium, water flow patterns became more non-uniform and dispersive with decreasing water saturation due to the presence of air phase, which lead to an increase of the tortuosity of the flow pathways under unsaturated conditions. Bacteria transport pathways were different from the tracer transport, due to size exclusion of bacteria from smaller pore spaces and bacteria motility. Bacteria deposition was greatly influenced by pore network geometry, cell properties and water saturation degree. Both physical straining and physicochemical attachment should be taken into account to well describe bacteria deposition, but their importance on bacteria deposition is closely linked to porous media and cell properties. The results obtained in this work highlighted the simultaneous role of cell properties, pore size distribution and hydrodynamics of the porous media on bacteria transport and deposition mechanisms. The calculation of DLVO and non-DLVO interactions showed that bacteria deposition in saturated and unsaturated porous media was influenced by both kinds of interactions.
Bacteria Transport Through Porous Media
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Author : Teh Fu Yen
language : en
Publisher:
Release Date : 1986
Bacteria Transport Through Porous Media written by Teh Fu Yen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Porous materials categories.
Mechanisms Of Transport Through Porous Media
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Author : Rossana Quiñones
language : en
Publisher:
Release Date : 1997
Mechanisms Of Transport Through Porous Media written by Rossana Quiñones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Particle Transport Through Porous Media
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Author : Laura M. McDowell-Boyer
language : en
Publisher:
Release Date : 1985
Particle Transport Through Porous Media written by Laura M. McDowell-Boyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Fluid dynamics categories.
Theory And Practice In Microbial Enhanced Oil Recovery
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Author : Kun Sang Lee
language : en
Publisher: Gulf Professional Publishing
Release Date : 2020-07-18
Theory And Practice In Microbial Enhanced Oil Recovery written by Kun Sang Lee and has been published by Gulf Professional Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-18 with Technology & Engineering categories.
Selection of the optimal recovery method is significantly influenced by economic issues in today’s oil and gas markets. Consequently, the development of cost-effective technologies, which bring maximum oil recovery, is the main interest in today’s petroleum research communities. Theory and Practice in Microbial Enhanced Oil Recovery provides the fundamentals, latest research and creditable field applications. Microbial Enhanced Oil Recovery (MEOR) is potentially a low-priced and eco-friendly technique in which different microorganisms and their metabolic products are implemented to recover the remaining oil in the reservoir. Despite drastic advantages of MEOR technology, it is still not fully supported in the industry due to lack of knowledge on microbial activities and their complexity of the process. While some selected strategies have demonstrated the feasibility to be used on a mass scale through both lab and field trials, more research remains to implement MEOR into more oil industry practices. This reference delivers comprehensive descriptions on the fundamentals including basic theories on geomicrobiology, experiments and modeling, as well as current tested field applications. Theory and Practice in Microbial Enhanced Oil Recovery gives engineers and researchers the tool needed to stay up to date on this evolving and more sustainable technology. Covers fundamental screening criteria and theories selective plugging and mobility control mechanisms Describes the basic effects on environmental parameters and the mechanics of simulation, including microbial growth kinetics Applies up to date practical applications proven in both the lab and the field
Transport Of Subsurface Bacteria In Porous Media
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Author :
language : en
Publisher:
Release Date : 1995
Transport Of Subsurface Bacteria In Porous Media written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
The primary objective of this study was to develop tools with which to measure the advective transport of microorganisms through porous media. These tools were then applied to investigate the sorptive properties of representative microorganisms that were selected at random from the DOE's deep subsurface collection of bacterial, maintained at Florida State University. The transport screening procedure that arose from this study was also used to investigate biological factors that affect the transport/sorption of biocolloids during their movement through porous media with the bulk advective flow.
Quantitative Analysis Of Non Linear Bacterial Transport In Intact Cores
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Author : Michael Christopher Wademan
language : en
Publisher:
Release Date : 2000
Quantitative Analysis Of Non Linear Bacterial Transport In Intact Cores written by Michael Christopher Wademan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
A Numerical Study Of Bacteria Transport Through Porous Media Using The Green Element Method
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Author : Suresh Ramsuroop
language : en
Publisher:
Release Date : 2000
A Numerical Study Of Bacteria Transport Through Porous Media Using The Green Element Method written by Suresh Ramsuroop and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Porous materials categories.
Evolution Equations Arising In The Modelling Of Life Sciences
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Author : Messoud Efendiev
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-14
Evolution Equations Arising In The Modelling Of Life Sciences written by Messoud Efendiev and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-14 with Mathematics categories.
This book deals with the modeling, analysis and simulation of problems arising in the life sciences, and especially in biological processes. The models and findings presented result from intensive discussions with microbiologists, doctors and medical staff, physicists, chemists and industrial engineers and are based on experimental data. They lead to a new class of degenerate density-dependent nonlinear reaction-diffusion convective equations that simultaneously comprise two kinds of degeneracy: porous-medium and fast-diffusion type degeneracy. To date, this class is still not clearly understood in the mathematical literature and thus especially interesting. The author both derives realistic life science models and their above-mentioned governing equations of the degenerate types and systematically studies these classes of equations. In each concrete case well-posedness, the dependence of solutions on boundary conditions reflecting some properties of the environment, and the large-time behavior of solutions are investigated and in some instances also studied numerically.