Modelling The Risk Of Chloridnated Hydrocarbons In Urban Groundwater

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Numerical Characterization of Mechanical Stress and Flow Patterns in Stirred Tank Bioreactors

Author : Manely Eslahpazir Esfandabadi
Publisher : Cuvillier Verlag
ISBN 13 : 3736944497
Total Pages : 146 pages
Book Rating : 4.7/5 (369 download)

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Book Synopsis Numerical Characterization of Mechanical Stress and Flow Patterns in Stirred Tank Bioreactors by : Manely Eslahpazir Esfandabadi

Download or read book Numerical Characterization of Mechanical Stress and Flow Patterns in Stirred Tank Bioreactors written by Manely Eslahpazir Esfandabadi and published by Cuvillier Verlag. This book was released on 2013-06-24 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Das Ziel der Arbeit bestand darin, die lokalen und globalen mechanischen Beanspruchungsparameter in einem Rührkesselbioreaktor mit Hilfe der numerischen Strömungssimulation (CFD) nachzubilden und die Ergebnisse mit experimentellen Daten der Pellet-kultivierung bzgl. Fluiddynamik und Rheolgie des rekombinanten Stammes A. niger SKAn1015 zu validieren. Ausgehend von der einphasigen Strömungssimulation eines 2L-Bioreaktors werden zunächst Simultionsdaten über Strömungsgeschwindigkeit und mechanische Beanspruchung diskutiert. Aßerdem erfolgt eine Validierung der einphasigen Simulationsdaten mit der Particle Image Velocimetry. In weiteren Untersuchungen wird die Strömungssimulation auch auf nicht-newtonsche Flüssigkeiten, so wie sie bei der Kultivierung filamentöser Pilze üblicherweise auftreten, mit dem Ostwald - de Waele-Ansatz erweitert und die mechanische Beanspruchung in Abhängigkeit zu den rheologischen Prozessparametern korreliert. Die Untersuchung des Einflusses unterschiedlicher Rührergeometrien auf die Strömungsfelder und die mechanische Beanspruchung mittels CFD bildet den Abschluss, so dass die Auswahl eines geeigneten Rührers für den Kultivierungsprozess mit schesensitiven biologischen Systemen eindeutig getroffen wird. Die Arbeit validiert die numerische Strömungssimulation in einem Bioreaktor mit experimentell gnerierten biologischen und fluiddynamischen Prozessdaten und gibt praktische Hinweise darüber, wie biotechnologische Prozesse mit filamentösen Mikroorganismen hinsichtlich der Minimierung der mechanischen Beanspruchung zu betreiben sind.

NBS Special Publication

Author :
Publisher :
ISBN 13 :
Total Pages : 964 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis NBS Special Publication by :

Download or read book NBS Special Publication written by and published by . This book was released on 1980 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Groundwater and Soil Cleanup

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309065496
Total Pages : 301 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Groundwater and Soil Cleanup by : National Research Council

Download or read book Groundwater and Soil Cleanup written by National Research Council and published by National Academies Press. This book was released on 1999-11-21 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive, up-to-date review of technologies for cleaning up contaminants in groundwater and soil. It provides a special focus on three classes of contaminants that have proven very difficult to treat once released to the subsurface: metals, radionuclides, and dense nonaqueous-phase liquids such as chlorinated solvents. Groundwater and Soil Cleanup was commissioned by the Department of Energy (DOE) as part of its program to clean up contamination in the nuclear weapons production complex. In addition to a review of remediation technologies, the book describes new trends in regulation of contaminated sites and assesses DOE's program for developing new subsurface cleanup technologies.

Toxicological Profile for Polycyclic Aromatic Hydrocarbons

Author :
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Toxicological Profile for Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Veterinary Toxicology for Australia and New Zealand

Author : Rosalind Dalefield
Publisher : Elsevier
ISBN 13 : 0127999124
Total Pages : 630 pages
Book Rating : 4.1/5 (279 download)

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Book Synopsis Veterinary Toxicology for Australia and New Zealand by : Rosalind Dalefield

Download or read book Veterinary Toxicology for Australia and New Zealand written by Rosalind Dalefield and published by Elsevier. This book was released on 2017-06-23 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Veterinary Toxicology for Australia and New Zealand is a reference suited to the unique challenges of veterinary practice in Australia and New Zealand. Both streamlined and thorough in its coverage of poisons and treatments for those locations, this focused approach allows readers to quickly find relevant information that is presented in a concise and logical manner that is useful to clinicians. The authors draw upon a wealth of knowledge of the particularities of toxicology in Australia and New Zealand to present readers with the up-to-date information required to efficiently and effectively diagnose and treat their patients. - Highlights toxins of specific concern in Australia and New Zealand - Structures information in a logical way so that it can be located quickly - Offers up-to-date information on current and emerging risks

Effect of fluid dynamics on pellet morphology and product formation of "Aspergillus niger"

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Author : Pey-Jin Lin
Publisher : Cuvillier Verlag
ISBN 13 : 3736941811
Total Pages : 126 pages
Book Rating : 4.7/5 (369 download)

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Book Synopsis Effect of fluid dynamics on pellet morphology and product formation of "Aspergillus niger" by : Pey-Jin Lin

Download or read book Effect of fluid dynamics on pellet morphology and product formation of "Aspergillus niger" written by Pey-Jin Lin and published by Cuvillier Verlag. This book was released on 2012-08-13 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The product formation of the biopellets of filamentous fungi, such as Aspergillus niger, is closely linked with the pellet morphology. Therefore, investigations were carried out to determine the influence of fluid dynamic conditions on the growth of fungal pellets. During the present study, important information about the evolution of morphological changes during the cultivation process in stirred tank reactors was gathered from cultivations at different volumetric power inputs by agitation and aeration. The quantification of the pellet morphology was accomplished by the digital image analysis and the laser diffraction technique tracing parameters like the pellet diameter and the pellet concentration. The property of the pellet surface structure was determined by the microscopic image analysis of the pellet slices and verified by sedimentation velocity measurements. Results revealed a notable variation in morphological data among pellets cultivated at different volumetric power inputs by agitation and aeration, by which the production yields of the model product glucoamylase were correspondingly altered. Furthermore, without raising the total energy input, by utilizing of the different impact of aeration- and agitation-induced volumetric power input on the fungal pellet morphology, the product formation could be consequentially improved. Die Produktbildung der Biopellets von filamentösen Pilzen, wie Aspergillus niger, ist eng mit der Pelletmorphologie verknüpft. Daher wurden Untersuchungen durchgeführt, um den Einfluss von fluiddynamischen Bedingungen auf das Wachstum von Pilzpellets zu bestimmen. In der vorliegenden Arbeit wurden wichtige Informationen über die Entwicklung der morphologischen Veränderungen von Kultivierungen bei verschiedenen Leistungseinträgen durch Rühren und Begasen gesammelt. Die Quantifizierung der Pelletmorphologie wurde, zur Erfassung verschiedener Parameter wie zum Beispiel des Pelletdurchmessers oder der Pelletkonzentration, mit Hilfe von Bildanalyse und Laserbeugung durchgeführt. Die Qualifizierung der Pelletoberflächenstruktur wurde durch die mikroskopische Bildanalyse von Pelletschnitten bestimmt und durch Sinkgeschwindigkeitsmessungen verifiziert. Die Ergebnisse zeigten eine bemerkenswerte Variation in morphologischen Daten bei Pellets, die unter verschiedenen Leistungseinträgen durch Rühren und Begasen kultiviert wurden, wodurch sich die Ausbeuten des Modellprodukts Glucoamylase entsprechend veränderten. Weiterhin konnte ohne Erhöhung des Gesamtenergieeintrags bei Variation des begasungs- und rührerinduzierten Leistungseintrags die Pelletmorphologie verändert und die Produktbildung verbessert werden.

Volatilization Rates from Water to Indoor Air

Author :
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Volatilization Rates from Water to Indoor Air by :

Download or read book Volatilization Rates from Water to Indoor Air written by and published by . This book was released on 2000 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sustainable Groundwater Development

Author : Kevin M. Hiscock
Publisher : Geological Society of London
ISBN 13 : 9781862390973
Total Pages : 364 pages
Book Rating : 4.3/5 (99 download)

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Book Synopsis Sustainable Groundwater Development by : Kevin M. Hiscock

Download or read book Sustainable Groundwater Development written by Kevin M. Hiscock and published by Geological Society of London. This book was released on 2002 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Selected Water Resources Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 804 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Unsaturated Soils

Author : José Fernando Thome Jucá
Publisher : Taylor & Francis US
ISBN 13 : 9789058093721
Total Pages : 454 pages
Book Rating : 4.0/5 (937 download)

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Book Synopsis Unsaturated Soils by : José Fernando Thome Jucá

Download or read book Unsaturated Soils written by José Fernando Thome Jucá and published by Taylor & Francis US. This book was released on 2002 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated materials comprise residua, collapsible and expansive naturally occurring soils, compacted soils and, more recently, residues of solid wastes. The engineering problems associated with unsaturated materials range from those related to conventional geotechnical works (e.g. foundations, pavements, slopes and excavations, retaining structures, earthdams, irrigation canals, tunnelling, compacted embankments) to those included in the environmental area (e.g. natural slope instability, erosion and subsidence processes, tailings, residues or solid waste disposal, contaminant transport, remediation of contaminant sites, engineered barriers for environmental protection, re-use of residues). This book, published in three separate volumes, comprises a selection of selected and invited papers presented at the Third International Conference on Unsaturated Soils – UNSAT ‘2002 – that took place in Recife, Brazil, form 10th to 13th March 2002. The book is of interest to consultants, researchers, practitioners, lecturers and students with a background in geotechnical engineering, environmental engineering and engineering geology.

Pollution Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 846 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Pollution Abstracts by :

Download or read book Pollution Abstracts written by and published by . This book was released on 1994 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.

Selected Water Resources Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 1344 pages
Book Rating : 4.:/5 (319 download)

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Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 1344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modelling the Risk of Chloridnated Hydrocarbons in Urban Groundwater

Author : Tillman Greis
Publisher : Cuvillier
ISBN 13 : 9783869559704
Total Pages : 0 pages
Book Rating : 4.5/5 (597 download)

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Book Synopsis Modelling the Risk of Chloridnated Hydrocarbons in Urban Groundwater by : Tillman Greis

Download or read book Modelling the Risk of Chloridnated Hydrocarbons in Urban Groundwater written by Tillman Greis and published by Cuvillier. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main target of this work is the development of a risk assessment approach of groundwater contaminations in an urban area. A multidisciplinary approach was performed to assess degradation potential of contaminant species in soil and the inherent risk posed by anthropogenic substances. Experimental and theoretical methods range from chemical and biochemical to geoengineering applications. This especially concerns molecular biological, wet-chemistry techniques and Finite Element groundwater transport and reaction modelling. The spatial dimensions considered in the studies range from small laboratory to field scales. With regard to these applied methods the overall goal was a holistic risk approach to intertwine both, reactive transport of contaminants in groundwater and human health risks. An experimental area polluted with chlorinated ethenes and located in Braunschweig was chosen to validate the model. Based on repeated measurement campaigns pollutant concentrations as well as other environmental parameters and chemical data were determined and their quality was valued at assessed literature data. With the obtained experimental data a groundwater reactive transport model was established and validated. Further, to test the influence of the flow, transport and reaction model parameters a sensitivity analysis was performed. Based on this analysis, contaminant specific probabilities of occurrence were calculated with a Monte-Carlo simulation approach. Additionally, model optimisation techniques were applied to improve conformity of simulated and experimental data. It could be shown, that a simplified first-order reaction kinetic is only partially capable of rendering the measured field data. Hence, it was necessary to extend and improve the underlying degradation kinetics by means of modified Monod-equations. Here, the extension mainly comprises the introduction of inorganic electron acceptors as well as inhibiting reactions to refine the reductive dechlorination pro

Cumulated Index Medicus

Author :
Publisher :
ISBN 13 :
Total Pages : 1200 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Cumulated Index Medicus written by and published by . This book was released on 1987 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Hydraulic Research in the United States and Canada

Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 402 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Hydraulic Research in the United States and Canada by : United States. National Bureau of Standards

Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Smart Cities: Importance of Management and Innovations for Sustainable Development

Author : Dagmar Cagáňová
Publisher : Springer Nature
ISBN 13 : 3031565339
Total Pages : 473 pages
Book Rating : 4.0/5 (315 download)

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Book Synopsis Smart Cities: Importance of Management and Innovations for Sustainable Development by : Dagmar Cagáňová

Download or read book Smart Cities: Importance of Management and Innovations for Sustainable Development written by Dagmar Cagáňová and published by Springer Nature. This book was released on with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface

Author : Todd H. Wiedemeier
Publisher : John Wiley & Sons
ISBN 13 : 9780471197492
Total Pages : 634 pages
Book Rating : 4.1/5 (974 download)

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Book Synopsis Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface by : Todd H. Wiedemeier

Download or read book Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface written by Todd H. Wiedemeier and published by John Wiley & Sons. This book was released on 1999-03-08 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive guide to one of today's most innovative approaches to environmental contamination Natural attenuation is gaining increasing attention as a nonintrusive, cost-effective alternative to standard remediation techniques for environmental contamination. This landmark work presents the first in-depth examination of the theory, mechanisms, and application of natural attenuation. Written by four internationally recognized leaders in this approach, the book describes both biotic and abiotic natural attenuation processes, focusing on two of the environmental contaminants most frequently encountered in groundwater--fuels and chlorinated solvents. The authors draw on a wealth of combined experience to detail successful techniques for simulating natural attenuation processes and predicting their effectiveness in the field. They also show how natural attenuation works in the real world, using numerous examples and case studies from a wide range of leading-edge projects nationwide involving fuel hydrocarbons and chlorinated solvents. Finally, they discuss the evaluation and assessment of natural attenuation and explore the design of long-term monitoring programs. An indispensable reference for anyone working in environmental remediation, Natural Attenuation of Fuels and Chlorinated Solvents in the Subsurface is essential reading for scientists and engineers in a range of industries, as well as state and federal environmental regulators, and professors and graduate students in environmental or chemical engineering.