Microbial Ecology of Activated Sludge

Author: R. J. Seviour,Per Halkjær Nielsen

Publisher: IWA Publishing

ISBN: 1843390329

Category: Science

Page: 667

View: 9127

"Microbial Ecology of Activated Sludge, written for both microbiologists and engineers, critically reviews our current understanding of the microbiology of activated sludge, the most commonly used process for treating both domestic and industrial wastes.The contributors are all internationally recognized as leading research workers in activated sludge microbiology, and all have made valuable contributions to our present understanding of the process. The book pays particular attention to how the application of molecular methods has changed our perceptions of the identity of the filamentous bacteria causing the operational disorders of bulking and foaming, and the bacteria responsible for nitrification and denitrification and phosphorus accumulation in nutrient removal processes. Special attention is given to how it is now becoming possible to relate the composition of the community of microbes present in activated sludge, and the in situ function of individual populations there, and how such information might be used to manage and control these systems better. Detailed descriptions of some of these molecular methods are provided to allow newcomers to this field of study an opportunity to apply them in their research. Comprehensive descriptions of organisms of interest and importance are also given, together with high quality photos of activated sludge microbes."--Publisher's description.
Posted in Science

The Microbiology of Activated Sludge

Author: Robert J. Seviour,L. Blackall

Publisher: Springer Science & Business Media

ISBN: 9401139512

Category: Science

Page: 422

View: 6547

This book has been a long time in preparation. Initially it grew out of our frustrating attempts over the past ten years to identify the filamentous bacteria seen in large numbers in most activated sludge plants, and the realization that we know very little about them and the other microbial populations in these systems. Unfortunately this book does not provide many answers to the problems these filamentous bacteria can cause, but we hope it might encourage microbiologists and engineers to communi cate more with each other and to spend some time trying to understand the tax onomy, ecology and physiology of activated sludge microbes. It is now very timely, for example, to try to provide these filamentous bacteria with proper taxonomically valid names and to determine their correct place in bacterial classifications. This book is not meant to compete directly with the books by Gray (1989, 1990) nor the excellent manual published by Jenkins and coworkers (1993b), which has been invaluable to us and others trying to identify filamentous bacteria. Wanner's book (1994a) also provides an excellent account of the problems of bulking and foaming caused by filamentous bacteria. These publications and others by Eikelboom's group have made an enormous contribution to the study of filamentous bacteria, and will con tinue to do so.
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Activated Sludge Separation Problems

Theory, Control Measures, Practical Experiences

Author: Valter Tandoi,Simona Rossetti,Jiri Wanner

Publisher: IWA Publishing

ISBN: 1780408633

Category: Science

Page: 320

View: 9165

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.
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Activated Sludge

Bulking and Foaming Control

Author: Jiri Wanner

Publisher: CRC Press

ISBN: 1498710816

Category: Technology & Engineering

Page: 338

View: 5940

Filamentous bulking and foaming are the most frequent operational problems in activated sludge plants. This recent book provides a comprehensive, concise guide to the microbiological and technical aspects of bulking and foaming control. The result of over 25 years of research, the book stresses practical control measures based on kinetic and metabolic selection theories, as well as on case histories. Topics in the book include: biochemical processes in wastewater treatment, evaluation ofseparation 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. It was the intention of the author to summarize in this book all essential pieces of information on both the microbiological and technical aspects of bulking and foaming control, so microbiologists and engineers can find new and helpful information from each other's field without studying vast numbers of primary literature sources. Naturally, the practical pieces of information required for solving practical operational problems are more stressed. The book is arranged into six major chapters which are subdivided into uniform topical sections. The reader interested in a particular problem or searching for a particular solution does not necessarily need to read the whole book to get the answer. There are many cross-references in the text which will lead the reader to the background of the problem, and to show its connection to similar problems and their solutions.
Posted in Technology & Engineering

Nitrification and Denitrification in the Activated Sludge Process

Author: Michael H. Gerardi

Publisher: John Wiley & Sons

ISBN: 0471461318

Category: Science

Page: 193

View: 6101

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, permitcompliance, process control, and troubleshooting in wastewatertreatment plants. Avoiding the technical jargon, chemicalequations, and kinetics that typically accompany such texts,Nitrification and Denitrification in the Activated Sludge Processdirectly addresses plant operators and technicians, providingnecessary information for understanding the microbiology andbiological conditions that occur in the treatment process. Of special interest to wastewater treatment plant operators arethe bacteria that degrade nitrogenous wastes–the nitrifyingbacteria–and the bacteria that degrade carbonaceouswastes–the cBOD-removing bacteria. Both groups of bacterianeed to be routinely monitored and operational conditions favorablyadjusted to ensure desired nitrification. Each chapter in thisgroundbreaking study offers a better understanding of theimportance of nitrification and denitrification and the bacteriainvolved 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
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Settleability Problems and Loss of Solids in the Activated Sludge Process

Author: Michael H. Gerardi

Publisher: John Wiley & Sons

ISBN: 0471272744

Category: Science

Page: 192

View: 3601

The activated sludge process is the most versatile, commonly usedwastewater treatment system in North America; however, manyactivated sludge processes frequently experience operationalproblems related to poor compaction or settleability of secondarysolids and loss of secondary solids from the clarifier. Eschewingthe technical jargon and copious chemical equations found in themajority of wastewater studies, Settleability Problems andLoss of Solids in the Activated Sludge Process speaksdirectly to plant operators, showing them how to identify and solvecommon problems and achieve maximum efficiency. Michael H. Gerardi’s hands-on guide addresses the mostcommon plant operational problems, such as increased costs, loss oftreatment efficiency, and permit violations. Using numerous tablesand illustrations, Settleability Problems provides microscopic andanalytical techniques for troubleshooting and identifying theconditions responsible for settleability problems and loss ofsolids. It includes pictures of wet mounts and smears of acceptableand unacceptable microscopic conditions of the activated sludge andpresents corrective measures for operational problems. Chaptersinclude: 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 beof unparalleled value to wastewater treatment plant operators aswell as students of wastewater microbiology.
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Wastewater Microbiology

Author: Gabriel Bitton

Publisher: John Wiley & Sons

ISBN: 0471717916

Category: Science

Page: 772

View: 2164

The new edition of a classic reference incorporating the latestfindings and discoveries The Third Edition of this classic reference provides readers withconcise, up-to-the-moment coverage of the role of microorganisms inwater and wastewater treatment. By providing a solid foundation inmicrobiology, microbial growth, metabolism, and nutrient cycling,the text gives readers the tools they need to make criticaldecisions that affect public health, as well as the practicalaspects of treatment, disinfection, water distribution,bioremediation, and water and wastewater reuse. The publication begins a discussion of microbiology principles,followed by a discussion of public health issues and concerns.Next, the core of the text is dedicated to a thorough examinationof wastewater and drinking water treatment, biosolids,pollution-control biotechnology, and drinking water distribution.The remainder of the text discusses toxicity testing in wastewatertreatment plants, and the public health aspects of wastewaterdisposal and reuse. The many advances in wastewater and drinking water microbiologyhave all been thoroughly integrated into the publication,including: * A new chapter on bioterrorism and drinking water safety * The latest developments in biofilm microbial ecology and biofilmimpact on drinking water quality * New, state-of-the-art detection techniques * Expanded and revised treatment of toxicity testing, including newtesting methods and studies on endocrine disrupters inwastewater * Alternatives to conventional wastewater treatment New problem sets, which test readers' knowledge, as well as a listof Internet resources have been added to each chapter. In addition,the publication's extensive references have been thoroughly revisedfor readers who would like to learn more about the latest findingsand discoveries on specialized topics. Finally, the color platesection has been expanded and contains many new illustrations andtables. An authoritative guide for all researchers, administrators, andengineers in the field of microbiology, Wastewater Microbiology,Third Edition is also a valuable reference for civil andenvironmental engineers, public health officials, and studentsinvolved in environmental engineering and science.
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Environmental Pollution Control Microbiology

A Fifty-Year Perspective

Author: Ross E. McKinney

Publisher: CRC Press

ISBN: 9780203025697

Category: Science

Page: 464

View: 577

Compiling knowledge gained through more than 50 years of experience in environmental engineering technology, this book illustrates the application of fundamental concepts in microbiology to provide a sound basis for the design and operation of various biological systems used in solving environmental challenges in the air, water, and soil. Environme
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Handbook of Water and Wastewater Microbiology

Author: Duncan Mara,Nigel J. Horan

Publisher: Elsevier

ISBN: 9780080478197

Category: Technology & Engineering

Page: 832

View: 9968

"Access to safe water is a fundamental human need and therefore a basic human right" --Kofi Annan, United Nations Secretary General Edited by two world-renowned scientists in the field, The Handbook of Water and Wastewater Microbiology provides a definitive and comprehensive coverage of water and wastewater microbiology. With contributions from experts from around the world, this book gives a global perspective on the important issues faced in the provision of safe drinking water, the problems of dealing with aquatic pollution and the processes involved in wastewater management. Starting with an introductory chapter of basic microbiological principles, The Handbook of Water and Wastewater Microbiology develops these principles further, ensuring that this is the essential text for process engineers with little microbiological experience and specialist microbiologists alike. Comprehensive selection of reviews dealing with drinking water and aquatic pollution Provides an understading of basic microbiology and how it is applied to engineering process solutions Suitable for all levels of knowledge in microbiology -from those with no background to specialists who require the depth of information
Posted in Technology & Engineering

Wastewater Microbiology

A Handbook for Operators

Author: Toni Glymph

Publisher: American Water Works Association

ISBN: 9781613000120

Category:

Page: N.A

View: 4205

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Modeling of Activated Sludge Systems

Author: Derin Orhon

Publisher: CRC Press

ISBN: 9781566761017

Category: Technology & Engineering

Page: 589

View: 3170

Activated sludge is the most vital wastewater process today. Now, this recent book provides a comprehensive guide to the modelling and design of activated sludge systems. Written by two leaders in the wastewater field, the book presents extensive and up-to-date coverage of all areas in the activated sludge process microbiological basis, reactor kinetics, and design methodologies. The book is organized for easy reference and is ideal as a text or desktop guide.
Posted in Technology & Engineering

Microorganisms in Activated Sludge and Biofilm Processes III

Selected Proceedings of the 3rd IWA International Specialised Conference on Microorganisms in Activated Sludge and Biofilm Processes, Held in Rome, Italy, 13-15 June 2001

Author: Valter Tandoi

Publisher: N.A

ISBN: N.A

Category: Biofilms

Page: 574

View: 8028

Posted in Biofilms

Activated Sludge - 100 Years and Counting

Author: David Jenkins,Jiri Wanner

Publisher: IWA Publishing

ISBN: 178040493X

Category: Science

Page: 464

View: 8592

Activated Sludge - 100 Years and Counting covers the current status of all aspects of the activated sludge process and looks forward to its further development in the future. It celebrates 100 years of the Activated Sludge process, from the time that the early developers presented the seminal works that led to its eventual worldwide adoption. The book assembles contributions from renowned world leaders in activated sludge research, development, technology and application. The objective of the book is to summarise the knowledge of all aspects of the activated sludge process and to present and discuss anticipated future developments. The book comprises invited papers that were delivered at the conference "Activated Sludge...100 Years and Counting!", held in Essen, Germany, June 12th to 14th, 2014. Activated Sludge - 100 Years and Counting is of interest to researchers, engineers, designers, operations specialists, and governmental agencies from a wide range of disciplines associated with all aspects of the activated sludge process. Authors: David Jenkins, University of California at Berkeley, USA, Jiri Wanner, Institute of Chemical Technology, Prague, Czech Republic.
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Microbiology for Water and Wastewater Operators (Revised Reprint)

Author: Frank R. Spellman

Publisher: CRC Press

ISBN: 9781566769082

Category: Technology & Engineering

Page: 209

View: 5358

This new expanded edition of Microbiology for Water/Wastewater Operators augments previous information and emphasizes the new world order of water control based on microbiological principles and practices. Microbiology for Water/Wastewater Operators... * Explains microbes that threaten health * Links microbes to operator activities and collection procedures * Covers giardia and cryptosporidia * Useful for understanding organisms in activated sludge User-friendly and understandable, Microbiology for Water/Wastewater Operators provides operators with need to know information about microbiology fundamentals and applications. This new resource is also a basic study tool by water/wastewater personnel preparing for their licensing examinations, or as a supplemental text in undergraduate or graduate courses in aquatic ecology, water/wastewater pollution control and in environmental science courses dealing with water biology. Microbiology for Water/Wastewater Operators is . . . * What operators need to know about microbiology fundamentals and applications * User-friendly, understandable-assumes no special prior knowledge * A troubleshooting handbook for activated sludge system personnel * A study guide for water/wastewater licensing exams
Posted in Technology & Engineering

The Microbiology of Anaerobic Digesters

Author: Michael H. Gerardi

Publisher: John Wiley & Sons

ISBN: 9780471468950

Category: Science

Page: 192

View: 4573

Anaerobic digestion is a biochemical degradation process that converts complex organic material, such as animal manure, into methane and other byproducts. Part of the author's Wastewater Microbiology series, Microbiology of Anareboic Digesters eschews technical jargon to deliver a practical, how-to guide for wastewater plant operators.
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Phosphorus in Fresh Water and the Marine Environment

Progress in Water Technology

Author: S. H. Jenkins,K. J. Ives

Publisher: Elsevier

ISBN: 1483147266

Category: Science

Page: 360

View: 3689

Phosphorus in Fresh Water and the Marine Environment investigates sources of phosphorus in fresh water and the marine environment and the problems it causes. The importance of phosphate precipitation as an inbuilt safety device against overproduction of algae in the oceans is discussed, along with the deposition and absorption of phosphates in sediments. The source of the phosphorus in lakes and rivers is considered in relation to population density and distribution. This book is comprised of 26 chapters and begins with a discussion on natural phosphate sources in relation to phosphate budgets, paying particular attention to eutrophication and soil erosion. The significance of man-made sources of phosphorus, such as fertilizers and farming, detergents and sewage, is then examined. Subsequent chapters focus on the role of phosphorus in the growth of plants and animals in rivers, lakes, and the sea; the hydrogeochemical cycling of phosphorus; phosphorus analysis in sea water; and safety evaluation of substitutes for phosphates in detergents. The microbiology of an activated sludge wastewater treatment plant chemically treated for phosphorus removal is also explored. This monograph will be of interest to policymakers concerned with water pollution control.
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Microbial Community Analysis

The Key to the Design of Biological Wastewater Treatment Systems

Author: T. E. Cloete,N. Y. O. Muyima

Publisher: IWA Publishing

ISBN: 9781900222020

Category: Science

Page: 98

View: 4263

Microbial Community Analysis surveys the vast amou
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An Operator's Guide to Biological Nutrient Removal (BNR) in the Activated Sludge Process

Author: Michael H. Gerardi

Publisher: Chemical Publishing Company

ISBN: 082060416X

Category: Technology & Engineering

Page: 176

View: 6245

Contents - List of Tables - List of Figures - PART ONE: NITRIFICATION - Chapter 1 Introduction - Chapter 2 Nitrogenous and Phosphorous Compounds - Chapter 3 Nitrification: The Basics - Chapter 4 Nitrifying Bacteria - Chapter 5 Nitrification and Limiting Factors - Chapter 6 Promoting Nitrification - PART TWO: DENITRIFICATION - Chapter 7 Denitrification: The Basics - Chapter 8 Denitrifying Bacteria - Chapter 9 Denitrification and Limiting Factors - PART THREE: BIOLOGICAL PHOSPHORUS REMOVAL - Chapter 10 Biological Phosphorus Removal: The Basics - Chapter 11 EBPR: Process Control - Abbreviations and Acronyms - Glossary - Bibliography - Biological nutrient removal (BNR), the removal of nitrogen and phosphorus from wastewater, is a complex process. Although the activated sludge process is an efficient technology for the removal of biochemical oxygen demand (BOD) and total suspended solids (TSS), it provides less-than-optimal conditions for the removal of nitrogen and phosphorus, and presents numerous challenges to the operator trying to satisfy the many requirements for several different groups of bacteria. In addition to satisfying the requirements there are numerous, highly variable operational conditions that impact BNR. These conditions include: changes in strength and composition of the wastewater, alkalinity and pH, temperature, and presence of inhibitory and toxic wastes. Even fluctuations in flows, especially from inflow and infiltration, can adversely impact the aerobic, anoxic, and anaerobic conditions needed for successful BNR. Of the three treatment processes, nitrification, denitrification, and enhanced biological removal, nitrification is often the most difficult to achieve. Therefore, a large portion of this book reviews nitrification. Operators of the activated sludge process need to understand the basic biological, chemical, and physical requirements for BNR in order to improve the performance of these treatment processes. An Operator's Guide to Biological Nutrient Removal (BNR) in the Activated Sludge Process is intended to help operators in the monitoring, troubleshooting, and process control of BNR. Numerous tables and figures are included in the book to help the operator understand the biological and chemical reactions that are involved in BNR processes and how the reactions can be monitored for process control. Design of BNR processes is not addressed in this book. Design is addressed in numerous engineering publications. The book serves to help operators achieve permit compliance for nitrogen and phosphorus discharge limits and obtain cost-effective operation. -
Posted in Technology & Engineering