Settleability Problems And Loss Of Solids In The Activated Sludge Process

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Settleability Problems and Loss of Solids in the Activated Sludge Process

Author : Michael H. Gerardi
Publisher : John Wiley & Sons
ISBN 13 : 0471272744
Total Pages : 191 pages
Book Rating : 4.4/5 (712 download)

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Book Synopsis Settleability Problems and Loss of Solids in the Activated Sludge Process by : Michael H. Gerardi

Download or read book Settleability Problems and Loss of Solids in the Activated Sludge Process written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2003-06-17 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: The activated sludge process is the most versatile, commonly used wastewater treatment system in North America; however, many activated sludge processes frequently experience operational problems related to poor compaction or settleability of secondary solids and loss of secondary solids from the clarifier. Eschewing the technical jargon and copious chemical equations found in the majority of wastewater studies, Settleability Problems and Loss of Solids in the Activated Sludge Process speaks directly to plant operators, showing them how to identify and solve common problems and achieve maximum efficiency. Michael H. Gerardi’s hands-on guide addresses the most common plant operational problems, such as increased costs, loss of treatment efficiency, and permit violations. Using numerous tables and illustrations, Settleability Problems provides microscopic and analytical techniques for troubleshooting and identifying the conditions responsible for settleability problems and loss of solids. It includes pictures of wet mounts and smears of acceptable and unacceptable microscopic conditions of the activated sludge and presents corrective measures for operational problems. Chapters include: Undesired Filamentous Growth Nutrient-Deficient Floc Particles Denitrification Slug Discharge of Soluble cBOD Viscous Bulking or Zoogloeal Growth Production and Accumulation of Foam and Scum Volume II in the series, Settleability Problems will prove to be of unparalleled value to wastewater treatment plant operators as well as students of wastewater microbiology.

Study of Particle Size Distribution in Activated Sludge Processes: Impacts of Solids Retention Time and Process Configurations

Author : Zhongtian Li
Publisher :
ISBN 13 :
Total Pages : 141 pages
Book Rating : 4.:/5 (17 download)

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Book Synopsis Study of Particle Size Distribution in Activated Sludge Processes: Impacts of Solids Retention Time and Process Configurations by : Zhongtian Li

Download or read book Study of Particle Size Distribution in Activated Sludge Processes: Impacts of Solids Retention Time and Process Configurations written by Zhongtian Li and published by . This book was released on 2016 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle size distribution of the particulates is an essential characteristic of the wastewater quality. Particle size distribution has been used to predict COD, suspended solids, color, and turbidity. The understanding of particle size distribution contributed to the better understanding of soluble and particulate COD fractions and benefited the modeling of activated sludge process. Particle size distribution of wastewater particles was used to improve the understanding of both primary treatment and secondary treatment. Particle size of activated sludge flocs may affect key sludge handling processes including sedimentation, thickening, digestion, and dewatering. Particle size distribution of secondary effluent is also an important consideration for the design of tertiary treatment such as filtration and disinfection. Several design and operational parameters, e.g. mixing, aeration, flocculation, and SRT, may affect particle size distribution of activated sludge. Previous results strongly suggest that SRT is an important parameter affecting particle size distribution in activated sludge process. However, direct comparison of different wastewater treatment plants could not rule out possible confounders such as sheer force in aeration basin, doses of coagulants, and variation of organic loadings. The objective of this study is to investigate particle size distribution of activated sludge flocs under different SRTs and treatment processes. Particle size distribution of lab-scale MLE reactor and IFAS reactor were studied under various SRTs and carbon sources. Five full-scale wastewater treatment plants were surveyed for detailed understanding of the change of particle size distribution from raw wastewater to secondary effluent. Chapter 2 investigates the impact of SRT on particle size distribution, sludge settleability, effluent turbidity, and removals of COD and NH4+-N. A MLE reactor is established with 16L of operational volume. Settling test, water quality analyses, and microscopic examination are applied to evaluate the impact of different SRTs. Particle size of activated sludge flocs are analyzed at different controlled SRTs. Particles with different size ranges were evaluated at various SRTs. Chapter 3 focuses on the impact of SRT on particle size distribution, sludge settleability, effluent turbidity, and removals of COD, NH4+-N in a lab-scale Integrated Fixed Film Activated Sludge (IFAS) reactor. Chapter 3 further investigates the impact of difference carbon sources (Glucose vs. Sodium Acetate) on particle size distribution and reactor performance in the IFAS reactor. Settling test, water quality analyses, and microscopic examination are applied to evaluate the impact of different SRTs. Particle size distribution of the mixed liquor in the IFAS reactor is compared with that in MLE reactor operated at similar SRTs for suspended solids. Chapter 4 surveys particle size distribution in 5 full-scale WWTPs with different SRTs and treatment processes in the Los Angeles County. Particles size distribution profiles from primary influent to secondary effluent are fully evaluated. The relationship between SRT and particle size of activated sludge in biological process and sedimentation process are studied in detail.

Activated Sludge

Author : Wesley Eckenfelder
Publisher : CRC Press
ISBN 13 : 0203968565
Total Pages : 334 pages
Book Rating : 4.2/5 (39 download)

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Book Synopsis Activated Sludge by : Wesley Eckenfelder

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

Activated Sludge: Developments And Sustainable Solutions

Author : Nicholas F Gray
Publisher : World Scientific
ISBN 13 : 180061389X
Total Pages : 626 pages
Book Rating : 4.8/5 (6 download)

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Book Synopsis Activated Sludge: Developments And Sustainable Solutions by : Nicholas F Gray

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)

Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability

Author : Donald M. D. Gray (Gabb)
Publisher : IWA Publishing
ISBN 13 : 9781843397526
Total Pages : 0 pages
Book Rating : 4.3/5 (975 download)

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Book Synopsis Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability by : Donald M. D. Gray (Gabb)

Download or read book Develop and Demonstrate Fundamental Basis for Selectors to Improve Activated Sludge Settleability written by Donald M. D. Gray (Gabb) and published by IWA Publishing. This book was released on 2007-02-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Successful operation of the activated sludge process relies heavily on the ability to effectively separate mixed liquor into return activated sludge (RAS) and a high quality final effluent. Solids separation efficiency is dictated in large part by the relative population of floc-forming and filamentous microorganisms present in the activated sludge. During normal operation, mixed liquor will be composed primarily of floc-formers with relatively low levels of filamentous organisms. Some population of filamentous organisms is necessary to promote the formation of larger flocs and prevent development of a "pin-floc" condition, which often results in high effluent turbidities (Jenkins, 2004). However, when conditions favoring the growth of filaments over floc-formers occur, a condition commonly referred to as filamentous "bulking" may occur.

Activated Sludge

Author : Jiri Wanner
Publisher : CRC Press
ISBN 13 : 1498710816
Total Pages : 338 pages
Book Rating : 4.4/5 (987 download)

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Book Synopsis Activated Sludge by : Jiri Wanner

Download or read book Activated Sludge written by Jiri Wanner and published by CRC Press. This book was released on 2014-07-22 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The result of over 25 years of research, this book is a concise guide to the microbiological and technical aspects of bulking and foaming control. It stresses practical control measures based on kinetic and metabolic selection theories and supported by case histories. Topics include: biochemical processes in wastewater treatment, evaluation of separation problems, settling and foaming principles, bulking and foaming control methods, and system design. More than 100 tables and figures illustrate complex processes, and over 500 references provide a detailed compendium of available resources. Cross-references provide background of a problem, its connection to similar problems, and their solutions.

Activated Sludge

Author : N. F. Gray
Publisher : Oxford University Press, USA
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Activated Sludge by : N. F. Gray

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.

Control Strategies for the Activated Sludge Process

Author : Thomas M. Keinath
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Control Strategies for the Activated Sludge Process by : Thomas M. Keinath

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:

Variability of the Settling Properties of the Activated Sludge Process Under Steady State Conditions

Author : Ivan Horacio Garcia
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Variability of the Settling Properties of the Activated Sludge Process Under Steady State Conditions by : Ivan Horacio Garcia

Download or read book Variability of the Settling Properties of the Activated Sludge Process Under Steady State Conditions written by Ivan Horacio Garcia and published by . This book was released on 1985 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Activated Sludge

Author : Tim Hobson
Publisher :
ISBN 13 : 9781500692995
Total Pages : 116 pages
Book Rating : 4.6/5 (929 download)

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Book Synopsis Activated Sludge by : Tim Hobson

Download or read book Activated Sludge written by Tim Hobson and published by . This book was released on 2009-12-08 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the book's introduction: This is not an introductory text about activated sludge. In this book, we discuss the observation, testing, and calculation procedures that provide data about the status of the activated sludge process. In addition, we discuss in depth how to apply this data to the business of controlling your activated sludge treatment process. Basic activated sludge concepts are addressed in this book in the context of process evaluation and control. We focus our efforts on discussing a basic, practical system of control for the process. The procedures discussed in this manual are equally applicable to all variations. An operator must have information about settleability, dissolved oxygen concentration, solids concentration, effluent quality, and clarifier sludge levels for consistent, efficient process performance of every type of activated sludge process. These procedures are covered in detail. The procedures discussed are based on work done by E. B. Mallory in the 1930's and 40's and further developed by Alfred W. West while he was head of the Operational Technology Branch of the Environmental Protection Agency in the 1960's and 70's. The system, with some modifications by this author, is frequently called the "West Method" or "Sludge Quality Method" of activated sludge process control because operational controls adjustments are based on the sludge quality existing in your facility rather than on arbitrary values.

Activated Sludge Technologies for Treating Industrial Wastewaters

Author : W. Wesley Eckenfelder
Publisher : DEStech Publications, Inc
ISBN 13 : 160595019X
Total Pages : 234 pages
Book Rating : 4.6/5 (59 download)

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Book Synopsis Activated Sludge Technologies for Treating Industrial Wastewaters by : W. Wesley Eckenfelder

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."

Activated Sludge Separation Problems

Author : Valter Tandoi
Publisher : IWA Publishing
ISBN 13 : 1780408633
Total Pages : 324 pages
Book Rating : 4.7/5 (84 download)

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Book Synopsis Activated Sludge Separation Problems by : Valter Tandoi

Download or read book Activated Sludge Separation Problems written by Valter Tandoi and published by IWA Publishing. This book was released on 2017-09-15 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated Sludge Separation Problems: Theory, Control Measures, Practical Experiences, Second Edition, describes the most common activated sludge separation problems and explains the main reasons for the growth of the different filamentous microorganisms in activated sludge. The book summarizes the identification techniques for important groups of activated sludge microorganisms both based on conventional microscopic analysis and using the biological molecular tools available today (FISH and PCR). This new edition, with 70% new and updated material, also provides explanation of basic activated sludge process principles and of parameters necessary for process control and operation. The theory of secondary clarifies is described to the extent necessary for understanding the construction and operation of secondary clarifiers. The activated sludge reactor and secondary clarifies are treated as one system and the interactions are explained. The wide range of experiences around the world is documented and the methods to avoid the proliferation of these organisms are presented and critically reviewed. Activated Sludge Separation Problems consists of six chapters, presenting up-to-date technical and scientific aspects of these processes. The new edition also features an extended list of literature references for further reading. The book will be a valuable help for students of environmental engineering, wastewater specialists, plant operators and designers of activated sludge plants. It is also useful for specialists in wastewater operation laboratories, especially for those studying activated sludge separation properties.

The Biology and Troubleshooting of Facultative Lagoons

Author : Michael H. Gerardi
Publisher : John Wiley & Sons
ISBN 13 : 1118981758
Total Pages : 246 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis The Biology and Troubleshooting of Facultative Lagoons by : Michael H. Gerardi

Download or read book The Biology and Troubleshooting of Facultative Lagoons written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2015-02-18 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides personnel a new understanding of how lagoon and fixed film sewage treatment systems work Tested in short-course situations by the author over the last 20 years Directs the material in a practical manner at operators who are responsible for process control and troubleshooting Reduces the jargon, chemical equations, and kinetics that overwhelm most operators and laboratory technicians Provides necessary information for understanding biological and chemical conditions at the treatment process

Activated Sludge and Aerobic Biofilm Reactors

Author : Marcos Von Sperling
Publisher : IWA Publishing
ISBN 13 : 1843391651
Total Pages : 337 pages
Book Rating : 4.8/5 (433 download)

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Book Synopsis Activated Sludge and Aerobic Biofilm Reactors by : Marcos Von Sperling

Download or read book Activated Sludge and Aerobic Biofilm Reactors written by Marcos Von Sperling and published by IWA Publishing. This book was released on 2007-03-30 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activated Sludge and Aerobic Biofilm Reactors is the fifth volume in the series Biological Wastewater Treatment. The first part of the book is devoted to the activated sludge process, covering the removal of organic matter, nitrogen and phosphorus.A detailed analysis of the biological reactor (aeration tank) and the final sedimentation tanks is provided. The second part of the book covers aerobic biofilm reactors, especially trickling filters, rotating biological contractors and submerged aerated biofilters. For all the systems, the book presents in a clear and informative way the main concepts, working principles, expected removal efficiencies, design criteria, design examples, construction aspects and operational guidelines. About the series: The series is based on a highly acclaimed set of best selling textbooks. This international version is comprised by six textbooks giving a state-of-the-art presentation of the science and technology of biological wastewater treatment. Other titles in the series are: Volume 1: Waste Stabilisation Ponds; Volume 2: Basic Principles of Wastewater Treatment; Volume 3: Waste Stabilization Ponds; Volume 4: Anaerobic Reactors; Volume 6: Sludge Treatment and Disposal

Operation of Wastewater Treatment Plants

Author :
Publisher :
ISBN 13 :
Total Pages : 562 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Operation of Wastewater Treatment Plants by :

Download or read book Operation of Wastewater Treatment Plants written by and published by . This book was released on 2004 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Considerations of Control of the Activated Sludge Treatment Process

Author : Robert Edwin Molzahn
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Considerations of Control of the Activated Sludge Treatment Process by : Robert Edwin Molzahn

Download or read book Considerations of Control of the Activated Sludge Treatment Process written by Robert Edwin Molzahn and published by . This book was released on 1971 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Assessment of Treatment Plant Performance and Water Quality Data: A Guide for Students, Researchers and Practitioners

Author : Marcos von Sperling
Publisher : IWA Publishing
ISBN 13 : 1780409311
Total Pages : 668 pages
Book Rating : 4.7/5 (84 download)

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Book Synopsis Assessment of Treatment Plant Performance and Water Quality Data: A Guide for Students, Researchers and Practitioners by : Marcos von Sperling

Download or read book Assessment of Treatment Plant Performance and Water Quality Data: A Guide for Students, Researchers and Practitioners written by Marcos von Sperling and published by IWA Publishing. This book was released on 2020-01-15 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the basic principles for evaluating water quality and treatment plant performance in a clear, innovative and didactic way, using a combined approach that involves the interpretation of monitoring data associated with (i) the basic processes that take place in water bodies and in water and wastewater treatment plants and (ii) data management and statistical calculations to allow a deep interpretation of the data. This book is problem-oriented and works from practice to theory, covering most of the information you will need, such as (a) obtaining flow data and working with the concept of loading, (b) organizing sampling programmes and measurements, (c) connecting laboratory analysis to data management, (e) using numerical and graphical methods for describing monitoring data (descriptive statistics), (f) understanding and reporting removal efficiencies, (g) recognizing symmetry and asymmetry in monitoring data (normal and log-normal distributions), (h) evaluating compliance with targets and regulatory standards for effluents and water bodies, (i) making comparisons with the monitoring data (tests of hypothesis), (j) understanding the relationship between monitoring variables (correlation and regression analysis), (k) making water and mass balances, (l) understanding the different loading rates applied to treatment units, (m) learning the principles of reaction kinetics and reactor hydraulics and (n) performing calibration and verification of models. The major concepts are illustrated by 92 fully worked-out examples, which are supported by 75 freely-downloadable Excel spreadsheets. Each chapter concludes with a checklist for your report. If you are a student, researcher or practitioner planning to use or already using treatment plant and water quality monitoring data, then this book is for you! 75 Excel spreadsheets are available to download.