Download or read book Oxygen Respiration Rates Measurements in the Activated Sludge Process written by George Arrueste and published by . This book was released on 1982 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 Nitrification and Denitrification in the Activated Sludge Process written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2003-03-19 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrification and Denitrification in the Activated Sludge Process, the first in a series on the microbiology of wastewater treatment, comprises the critical topics of cost-effective operation, permit compliance, process control, and troubleshooting in wastewater treatment plants. Avoiding the technical jargon, chemical equations, and kinetics that typically accompany such texts, Nitrification and Denitrification in the Activated Sludge Process directly addresses plant operators and technicians, providing necessary information for understanding the microbiology and biological conditions that occur in the treatment process. Of special interest to wastewater treatment plant operators are the bacteria that degrade nitrogenous wastes–the nitrifying bacteria–and the bacteria that degrade carbonaceous wastes–the cBOD-removing bacteria. Both groups of bacteria need to be routinely monitored and operational conditions favorably adjusted to ensure desired nitrification. Each chapter in this groundbreaking study offers a better understanding of the importance of nitrification and denitrification and the bacteria involved in these crucial processes. Chapters include: Organotrophs The Wastewater Nitrogen Cycle Nitrite Ion Accumulation Dissolved Oxygen Denitrifying Bacteria Gaseous End Products Free Molecular Oxygen The Occurrence of Denitrification

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 Evaluation of Some Methods for Identifying the Oxygen Transfer Rate and the Respiration Rate in an Activated Sludge Process written by Carl-Fredrik Lindberg and published by . This book was released on 1993 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Procedures and Practices in Activated Sludge Process Control written by Robert M. Arthur and published by Butterworth-Heinemann. This book was released on 1983 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Operating the Activated Sludge Process written by Kenneth John Hartley and published by . This book was released on 1985 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Test No 209 Activated Sludge Respiration Inhibition Test Carbon and Ammonium Oxidation written by Organisation for Economic Co-operation and Development and published by . This book was released on 2010 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Test Guideline is designed to assess the effects of a substance on micro-organisms from activated sludge of waste-water treatment plants by measuring their respiration rate (carbon and/or ammonium oxidation) as oxygen consumption. The test results may also serve as an indicator of suitable non-inhibitory concentrations of test substances to be used in biodegradability tests. The test allows the determination of ECx and/or NOEC values of the test substance. The inhibition of three different oxygen uptakes may be determined, i.e. total, heterotrophic only, and that due to nitrification in the absence and presence of N-allylthiourea, a specific nitrification inhibitor. For obtaining both NOEC and ECx, six controls and five treatment concentrations in a geometric series with five replicates are recommended. In each test vessel, test mixtures containing water, synthetic sewage feed and the test substance are incubated at the pH of 7.5 ±0.5 and the temperature within 20±2°C under forced aeration to keep the dissolved oxygen concentration above 60-70% saturation. The oxygen consumption is measured after 3 hours of exposure and additional measurements at 30 minutes of exposure can be performed in the case that the test substance is rapidly degraded.

Download or read book OECD Guidelines for the Testing of Chemicals Section 2 Test No 209 Activated Sludge Respiration Inhibition Test Carbon and Ammonium Oxidation written by OECD and published by OECD Publishing. This book was released on 2010-07-23 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Test Guideline is designed to assess the effects of a substance on micro-organisms from activated sludge of waste-water treatment plants by measuring their respiration rate (carbon and/or ammonium oxidation) as oxygen consumption. The test ...

Download or read book Instrumentation Control and Automation of Water and Wastewater Treatment and Transport Systems written by R. Briggs and published by Elsevier. This book was released on 2013-09-24 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation, Control and Automation of Water and Wastewater Treatment and Transport Systems documents the proceedings of the 5th IAWPRC Workshop held in Yokohama and Kyoto, Japan, 26 July-3 August 1990. The papers presented at this Workshop have emphasized the following aspects: • new sensor technology based on developments in electrochemistry, fiber optics, and electro-optics; • research into materials such as those needed to produce membranes of the required selectivity, for immobilization of reactive species, and for addition of reagents and standards; • the use of inferential measurements coupled with expert system technology; • the ever-increasing power of microprocessors and the continuing reduction in their unit costs; • better communications capability; • improved mathematical modeling; • an increased awareness of the improved management that results from the timely availability of relevant data to the appropriate levels in the management hierarchy. This book, together with the proceedings of previous workshops, provides what is probably the most comprehensive account of the state of the art and recent developments in instrumentation, control, and automation as applied to the water and water-using industries, and as such will be invaluable to the practitioner, the researcher, and the student community.

Download or read book Measurement and Validity of Specific Oxygen Uptake Rate as an Activated Sludge Process Control Parameter written by Gary Lee Edwards and published by . This book was released on 1981 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Instrumentation Control and Automation of Water and Wastewater Treatment and Transport Systems 1993 written by B. Jank and published by Elsevier. This book was released on 2016-06-06 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation, Control and Automation of Water and Wastewater Treatment and Transport Systems 1993 comprises a selection of manuscripts on the development of control strategies and their applications and on the status and future directions of Instrumentation, Control, and Automation (ICA) in the water and wastewater industry. The book starts by providing an overview of the status, the constraints and the future prospects for ICA in water and wastewater treatment and transport based on the survey responses of experts from 16 different countries. The text continues by presenting the need for dynamic modeling and simulation software to assist operations staff in developing effective instrumentation control strategies and to provide a training environment for the evaluation of such strategies. The book also covers the critical variables in system success; the use of an enterprise-wide computing that emphasizes the importance of strategic planning, performance measures, and human factors associated with the suggested implementation of applied technology; and the use of part-time unmanned operation at a large wastewater treatment plant. A functional approach based on the utility’s water and wastewater functional requirements; the collection system monitoring and control; water distribution and control systems; dynamic modeling and simulation; and process control strategy and development are also considered. This book will be beneficial to biochemists, wastewater technologists, and public health authorities.

Download or read book TOC ATP and Respiration Rate as Control Parameters for the Activated Sludge Process written by Clarence Ortman and published by . This book was released on 1977 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Membrane Coupled Activated Sludge Process in Municipal Wastewater Treatment written by Berthold Guender and published by CRC Press. This book was released on 2000-11-27 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a milestone. It is the first overall presentation that summarizes the membrane-coupled activated sludge process (MCASP) in its entirety. The volume offers a thorough survey of current know-how, an explanation of the operational MCASP in municipal plants with full-scale membrane modules, and a description of its advantages and d

Download or read book Application of On line Analytical Instrumentation to Process Control written by Robert M. Arthur and published by Butterworth-Heinemann. This book was released on 1982 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of the Activated Sludge Process written by Robert D. Bargman and published by . This book was released on 1973 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: