Download or read book Uncertainty Management in the Activated Sludge Process Innovative Applications of Computational Learning Theory written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uncertainty Management in the Activated Sludge Process microform Innovative Applications of Computational Learning Theory written by Abdelaziz Guergachi and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2000 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uncertainty Management in the Activated Sludge Process written by Abdelaziz Guergachi and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the foundations of a new area of research regarding mathematical modelling of biological wastewater treatment (WWT) processes are set. The main feature of this area is the introduction of innovative concepts and tools from emerging information modelling technologies into the traditional field of WWT process modelling. The model identification procedure is viewed as a learning problem or, equivalently, an information transfer from a set of real data into the process model. An innovative mathematical framework for the identification and validation of dynamic mechanistically based WWT process models is developed. Within this framework, a relationship between the model identification procedure and the computational machine learning methodology is established at the foundational level. The deviation D between model prediction and the real process behaviour is characterized mathematically in terms of some simple variables that govern model performance--namely: (1) the size of the data set used for model identification; (2) the quality of these data; (3) the model complexity; (4) the empirical measure of D computed on the basis of the foregoing data set. The development of the relationship between D and these variables is based on a principle called " Inductive Principle of Empirical Risk Minimization" ( IPERM ). The conditions of applicability of IPERM are thoroughly examined in the case of the activated sludge process being described by a simple mechanistic model denoted M . The Vapnik-Chervonenkis (VC) dimension of this model is estimated and two uncertainty models are developed for the activated sludge process (ASP). These two uncertainty models are compared and the differences between them accounted for. The following result is established: empirical data cannot compensate for our limited knowledge of process mechanisms, even if an infinite amount of data and computing power are made available during the model identification procedure. Measures of process model maximal and marginal improvements are developed. It is established that 80% of the model ( M ) maximal improvement occurs at a number of data points of about N80% 15 to 18. To achieve the other 20%, N has to be increased from the relatively small number N 80% to infinity. Procedures for computing the marginal cost of process model improvement and the guaranteed prediction accuracy of the identified model are developed. A new approach to modelling the activated sludge process itself and dealing with the almost-infinite degree of complexity of the ASP behaviour is developed. The basic idea of this approach is to construct an infinite series NS of nested mechanistic models of increasing complexity. This nested series is developed using the multi-substrate hypothesis. Both the Monod and the Tiessier models are considered in developing this nested series. Another principle called "Inductive Principle of Structural Risk Minimization" ( IPSRM ) is introduced and implemented to determine the optimal model structure complexity, for a fixed and small number N of data points. Computer simulations are carried out to confirm the theory and illustrate the use of the IPSRM and that of the nested series NS of ASP models.

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 360 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 Guidelines for Using Activated Sludge Models written by Leiv Rieger and published by IWA Publishing. This book was released on 2012-09-14 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical modelling of activated sludge systems is used widely for plant design, optimisation, training, controller design and research. The quality of simulation studies varies depending on the project objectives, finances and expertise available. Consideration has to be given to the model accuracy and the amount of time required carrying out a simulation study to produce the desired accuracy. Inconsistent approaches and insufficient documentation make quality assessment and comparison of simulation results difficult or almost impossible. A general framework for the application of activated sludge models is needed in order to overcome these obstacles. The genesis of the Good Modelling Practice (GMP) Task Group lies in a workshop held at the 4th IWA World Water Congress in Marrakech, Morocco where members of research groups active in wastewater treatment modelling came together to develop plans to synthesize the best practices of modellers from all over the world. The most cited protocols were included in the work, amongst others from: HSG (Hochschulgruppe), STOWA, BIOMATH and WERF. The goal of the group is to set up an internationally accepted framework to deal with the ASM type models in practice. This framework shall make modelling more straightforward and systematic to use especially for practitioners and consultants. Additionally, it shall help to define quality levels for simulation results, a procedure to assess this quality and to assist in the proper use of the models. The framework will describe a methodology for goal-oriented application of activated sludge models demonstrated by means of a concise guideline about the procedure of a simulation study and some illustrative case studies. The case studies shall give examples for the required data quality and quantity and the effort for calibration/validation with respect to a defined goal. The final report will include an extended appendix with additional information and details of methodologies. Additional features in Guidelines for Using Activated Sludge Models include a chapter on modelling industrial wastewater, an overview on the history, current practice and future of activated sludge modelling and several explanatory case studies. It can be used as an introductory book to learn about Good Modelling Practice (GMP) in activated sludge modelling and will be of special interest for process engineers who have no prior knowledge of modelling or for lecturers who need a textbook for their students. The STR can also be used as a modelling reference book and includes an extended appendix with additional information and details of methodologies. Scientific and Technical Report No. 22

Download or read book Activated Sludge written by Wesley Eckenfelder and published by CRC Press. This book was released on 1998-03-11 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past, industrial wastewater treatment primarily focused on the removal of BOD and suspended solids. In recent years, however, the focus has changed to aquatic toxicity, priority pollutants, and volatile organics. This required changes in how we design and operate biological treatment plants. Many existing plants must be retrofitted. New approaches to meet new requirements are discussed in detail. The authors, with a combined experience of sixty years, have presented case studies for a wide variety of industrial wastewaters including pulp and paper, food processing, chemical and pharmaceuticals, and textile wastewaters. Data interpretation and process design are developed through the use of seventeen examples. Procedures for the laboratory and pilot plant generation of process design data are presented. Emphasis is placed on meeting the many new regulations governing industrial wastewater discharges.

Download or read book Activated Sludge Technologies for Treating Industrial Wastewaters written by W. Wesley Eckenfelder and published by DEStech Publications, Inc. This book was released on 2013-09-30 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical information for using activated sludge to treat effluents from multiple industries Covers virtually all traditional and advanced methods, as well as treatability and process modeling New methods for removing U.S. and European regulated microconstituents, trace organics, active pharmaceutical ingredients and other contaminants Explains advances in water reuse and plant retrofitting Useful for in-house training This comprehensive book presents critical information on the applications of activated sludge for treating industrial wastewaters, as well as other effluents that impact POTWs. The book offers details on how advances in activated sludge can be deployed to meet more stringent discharge limits by explaining many novel variations of activated sludge and offering technical guidance on process modeling and optimization. Special attention is given to emerging contaminants and water reuse strategies. Case studies are drawn from the pharma, food and shale gas industries. Based on short courses taught by the authors, as well as hundreds of hours of in-plant consulting, this book offers the tools to understand and modify the activated sludge process for superior and sustainable wastewater treatment. From the Authors' Preface: "After speaking with practitioners, operators and engineers, the authors felt a new text was needed...to cover the following developments: "the continued evolution of the activated sludge process and its numerous designs, configurations and technology developments; "design of industrial water reuse systems...to achieve industry sustainability goals; "changes...from BOD, TSS and nutrient removal to removal of specific organics, toxicity...microconstituents, and more stringent effluent permit limits; "advances in process modeling tools that can be used in combination with treatability testing tools for plant design, optimization and troubleshooting; "concerns over industrial wastewater discharge impacts to POTWs, such as nitrification inhibition, the impact of frac water...and the fate of microconstituents through POTWs."

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 200 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 disadvantages. A new approach for calculating excess sludge production and oxygen consumption for the oxidation of carbon compounds is discussed. This approach details correct values for various wastewater streams-from very small to very high sludge loads. Derived values are then related to regulatory criteria and process design alternatives. This book also addresses the relationships between the alpha factor and the concentration of mixed liquor suspended solids (MLSS), as well as engineering issues such as: membrane performance, energy requirements, and the removal performance of membrane systems. The findings in The Membrane Coupled Activated Sludge Process in Municipal Wastewater Treatment support the practical applicability of the MCASP to smaller wastewater operations ranging from modest-sized municipal treatment plants to facilities serving only one structure. In addition, the MCASP process is shown to be applicable in water reuse operations. The Membrane Coupled Activated Sludge Process in Municipal Wastewater Treatment demonstrates that sewage treatment problems for various types of waste streams-from rural to suburban-can be solved with MCASP. All the required design and operational data for implementing this technology in wastewater treatment can be found in this book.

Download or read book Activated Sludge written by N. F. Gray and published by Oxford University Press, USA. This book was released on 1990 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated sludge is the most widely used biological wastewater treatment process in the world, both for domestic and industrial purposes. This book reviews the major theoretical concepts and practical operational factors, and describes the complexities inherent in the process, which depends on a dense microbial population mixed in wastewater under specific aerobic conditions. It is an ideal reference source for scientists, and a useful troubleshooting guide for practicing engineers and plant operators.

Download or read book Activated Sludge Process Design and Control written by Petr Grau and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Developments And Sustainable Solutions written by Nicholas F Gray and published by World Scientific. This book was released on 2023-02-27 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated sludge is the most widely used biological wastewater treatment process globally to date, although its high energy demand makes it a major contributor of greenhouse gas emissions. Over recent decades it has been constantly modified and retrofitted to treat ever higher loads or improve effluent standards which have often resulted in even greater carbon emissions. Conventional activated sludge treatment is at a crossroads where new sustainable solutions are required if we are to protect the quality of our rivers and meet net-zero carbon targets.The book details current operation and design with special emphasis on the biological aspects of the process. From the microbial kinetics to the fascinating process of floc formation and development, the book explores the development of our understanding of the process looking at new sustainable designs, including biological nutrient removal and new aeration systems. Sludge separation problems and control options are explained, with a trouble-shooting guide to non-bulking problems. Environmental issues including noise, odor, aerosols, micro-plastics and nanoparticles are all reviewed, as is pathogen removal and the problem of antibiotic resistant genes and bacteria. The development of membrane bioreactors has increased process reliability and effluent quality, while integrated fixed-film activated sludge processes are more efficient and compact. The book concludes by exploring how activated sludge can become more sustainable, for example, by carbon harvesting and byproduct recovery.This interdisciplinary book is essential reading for both engineers and scientists whether training at university or practitioners and consultants in the wastewater industry.Related Link(s)

Download or read book Environmental Engineering and Activated Sludge Processes written by Olga Sanchez and published by CRC Press. This book was released on 2016-06-22 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title includes a number of Open Access chapters. The activated sludge process is one of the most versatile and commonly used wastewater treatment systems in the world. In the past, when industrial wastewater treatment focused on removing biological oxygen demand and suspended solids, waste water plants needed different processes and technology

Download or read book Activated Sludge written by Paul Bishop and published by CRC Press. This book was released on 1995-12-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling and Management of the Activated Sludge Process written by Alan John Stokes and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics and Control of the Activated Sludge Process written by Paul Bishop and published by CRC Press. This book was released on 1992-04-24 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.