Download or read book Respirometry in Control of the Activated Sludge Process written by Henri Spanjers and published by IWA Publishing. This book was released on 1998-01-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ebook only (available soon) The report describes the principles of measurement of respiration rate, the transformation of measurement data into other types of information, and the application of the obtained information in process control strategies. Some fundamental concepts on biological respiration and process control are provided to assist the reader with understanding the principles. A structured overview comprises some eighty control strategies in which respirometry plays a role. To enable the reader to consult the information sources, an extensive literature list of over 500 references in included and classified into six themes. Contents Fundamentals of Respiration Measuring Principles Measured and Deduced Variables Elementary Control Concepts Respirometry in Control of the Activated Sludge Process Summary and Perspectives. Scientific and Technical Report No.7 Also Available Respirometry in Control of the Activated Sludge Process: Benchmarking Control Strategies

Download or read book Design and Operation of Activated Sludge Processes Using Respirometry written by Alan Rozich and published by CRC Press. This book was released on 1992-02-03 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a thorough overview of respirometry and its scientific and engineering basis. The book describes the fundamentals of biological waste treatment, development of predictive models for system design and operation, and how respirometry fits in with these operations. It also presents case studies, which give you concrete examples of the application of respirometry. This book will help activated sludge process control designers, operators, and managers of biological wastewater treatment facilitieslearn how to improve methods for the analysis of biological wastewater systems, enhance design and treatability projects, optimize and troubleshoot plant operations, and accurately predict the impact of new loads or streams on biological wastewater facilities.

Download or read book Respirometric Analysis of Activated Sludge written by Muyesser Yilmaz and published by LAP Lambert Academic Publishing. This book was released on 2012-04 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this study is the investigation of a wastewater treatment plant in terms of nitrogen removal potential and possible operational problems that may be generated by possible inhibitors. To this end, the characterization of wastewater, biological treatability tests, the investigation of chemicals that can act as inhibitors in the activated sludge systems were examined. Possible inhibitory effects of aromatic hydrocarbons on the biodegradation of domestic wastewater were investigated by respirometric analysis. Naphthalene, n-butyl acetate, and xylene were used as the model PAH compounds.

Download or read book Respirometry of Activated Sludge written by Milenko Ros and published by CRC Press. This book was released on 1993-03-01 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Nitrate Respiration in the Activated Sludge Process written by Carl Beer and published by . This book was released on 1980 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Respirometry in Control of the Activated Sludge Process written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Respirometry for Environmental Science and Engineering written by James C. Young and published by S & J Publishing Company. This book was released on 2004 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Wastewater Characterization in Activated Sludge Modelling written by Henryk Melcer and published by IWA Publishing. This book was released on 2004-11-01 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical modeling is a useful tool for the design, analysis and control of wastewater treatment systems. The activated sludge process is one of the most common processes used in wastewater treatment, and therefore is a particularly important candidate for the application of mathematical models. In the 1980s, a task group organized by the International Association on Water Quality (IAWQ) developed a conceptual model of the activated sludge process, which has become an industry-wide standard for the development of computer-based activated sludge models. A recent version of the IAWQ model incorporates 19 components, 17 processes, and numerous rate and stoichiometric coefficients. It is difficult and costly to quantify all of the necessary coefficients for any given application of the model; consequently, it is important to identify the most critical wastewater and biomass components and the relevant coefficients to be quantified for the most common uses of the model. It is also important to provide guidance to potential model users on the use of default and/or estimated values for the remaining parameters.

Download or read book Activated Sludge Kinetic Parameter Determination by Extant Respirometry written by Michael P. Johnson and published by . This book was released on 2006 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Respirometry in Control of the Activated Sludge Process written by J. B. Copp and published by IWA Publishing (International Water Assoc). This book was released on 2002-01-01 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special Offer - Respirometry in Control of the Act

Download or read book Evaluation of Respirometry based Control Strategies for the Activated Sludge Process by Computer Simulation written by Khanh Nguyen and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The respiration rate has generated much interest as a means of monitoring and controlling the activated sludge process because it is directly associated with both biomass growth and substrate removal. Respirometry has long been recognized as a valuable tool for controlling the activated sludge process, and as a result, many respirometry-based control strategies have been proposed in the literature. This study has developed a benchmark and methodology for conducting simulation studies to test the proposed control strategies within a complete and consistent set of process conditions. The benchmark consists of a complete set of influent conditions, a standard activated sludge plant configuration, models for the activated sludge process and the secondary clarification process, as well as values for the model parameters and initial values for the state variables. The benchmark provided the framework for the development of the simulation-based methodology. The methodology uses the benchmark, and includes a set of guidelines for implementing a control strategy in the benchmark plant and a set of tests for evaluating the performance and benefits of a proposed control system. The benchmark and methodology were then applied to test selected control strategies from the literature. (Abstract shortened by UMI.).

Download or read book New Concepts and Practices in Activated Sludge Process Control written by Robert M. Arthur and published by Butterworth-Heinemann. This book was released on 1982 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Dissolved Oxygen Concentration on the Activated Sludge Process written by Gregory Robert Swanson and published by . This book was released on 1982 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the introduction of pure oxygen activated sludge systems in the late 1960's, proponents have claimed several advantages resulting from the elevated dissolved oxygen (DO) levels maintained. However, numerous comparative studies have failed to produce a consensus of professional opinion regarding the validity of these claimed advantages. The purpose of this study was to evaluate fundamental theories that might explain the effects of elevated DO levels, to assess the validity of claimed advantages for pure oxygen systems, and to provide guidance regarding appropriate DO levels in activated sludge systems. A literature review revealed that dispersed bacterial cells respond to DO, as measured by respiration rate or intracellular concentrations of metabolites, only at very low concentrations (less than about 0.1 mg/1). Consequently, the occurrence of oxygen diffusional limitations in large bacterial floc and the development of an anoxic core was preliminarily identified as the only reasonable theory for explaining effects of high DO levels. The first phase of this study involved the development of dispersed bacterial cultures in chemostats. Results indicated no significant difference in yield, kinetic coefficients, or specific ATP content between chemostats operated at a low DO level (2.0 mg/1) and a high DO level (15 mg/1). These results confirmed that differences in activated sludge characteristics that apparently result from the maintenance of high DO levels can only be attributed to diffusional limitations. The second phase of this research utilized laboratory-scale activated sludge systems. A simple respirometric procedure was utilized to evaluate the response of respiration rate to DO concentration for these flocculant cultures and plots of specific respiration rate versus DO concentration were developed. These curves were subsequently described in terms of the DO at which the respiration rate was 50 percent of the maximum (C° 5) and the DO at which the respiration rate first reached the maximum (Co). Values for C o 0.5 ranged up to about 1.0 mg/1 and for Co up to about 10 mg/1 for culture samples with maximum floc diameters of 1200 microns and respiration rates up to 200 mg 02/g TSS-hr. The final phase of this research involved respirometric tests on mixed liquor samples obtained from three full-scale activated sludge plants, Results indicated that the critical DO (Co) was typically less than 1.5 mg/1, even at higher respiration rates resulting from the treatment of high-strength industrial wastewaters. Floc size measurements indicated that flocs in full-scale plants rarely exceed 300 microns in diameter. It was concluded that oxygen diffusional limitations typically do not occur at full-scale activated sludge plants if aeration basin DO concentrations are maintained above about 1.0 mg/l.

Download or read book Control Strategies for the Activated Sludge Process written by Thomas M. Keinath and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Activated Sludge written by Wesley Eckenfelder and published by CRC Press. This book was released on 1998-08-04 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Process Theory Kinetics and Sludge Quality Control: Activated Sludge Process - Process Theory - Activated Sludge Separation Problems - References Activated Sludge Treatment of Municipal Wastewater U.S.A. Practice: General Approach - Clarifier Design - Aeration Tank (Reactor) Design - Appurtenance Design - Configurations - ReferencesEurope

Download or read book A Study of Nitrate Versus Oxygen Respiration in the Activated Sludge Process written by Samuel Alan McClintock and published by . This book was released on 1986 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Industrial Wastewater Treatment by Activated Sludge written by Derin Orhon and published by IWA Publishing. This book was released on 2009-02-02 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial pollution is still a major concern and despite its significance, sound and systematic pollution control efforts are very poorly documented. The character and treatability of industrial wastewaters is highly variable and specific for each industrial activity. Biological treatment with activated sludge is the appropriate technology for industrial wastewaters from several major industrial sectors. Industrial Wastewater Treatment by Activated Sludge deals with the activated sludge treatment of industrial wastewaters by considering conceptual frameworks, methodologies and case studies, in a stepwise manner. The issues related to activated sludge treatment, such as biodegradability based characterization, modeling, assessment of stoichiometric and kinetic parameters and design, as well as the issues of industrial pollution control, e.g. in-plant control, effect of pretreatment, etc. are combined in a way to provide a comprehensive and information-rich view to the reader. By doing so, the book supplies an up-to-date reference for industrial wastewater experts and both graduate and undergraduate students. Industrial Wastewater Treatment by Activated Sludge provides a roadmap, describing the methodologies for the treatment of industrial wastewaters from several major sectors, based on a solid theoretical background. Up to now although valuable separate efforts both on activated sludge and industrial wastewater treatment have been presented, an integrated approach that is crucial to practice has not been available. This gap is filled by this book.