Settleability Problems and Loss of Solids in the Activated Sludge Process

Author: Michael H. Gerardi
Publisher: John Wiley & Sons
ISBN: 0471272744
Format: PDF, Docs
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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.

Nitrification and Denitrification in the Activated Sludge Process

Author: Michael H. Gerardi
Publisher: John Wiley & Sons
ISBN: 0471461318
Format: PDF, ePub, Mobi
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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

Environmental Engineering V

Author: Malgorzata Pawlowska
Publisher: CRC Press
ISBN: 1315281961
Format: PDF, Docs
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Poland, like other post-communist countries, is undergoing a transformation into a capitalist system. This transformation affects the country in many ways: economic, social, psychological and also ecological. Ecological problems are strongly connected with the political, economic and psychological inheritance of the past, as well as with changes in the post-communist society. In order to understand these problems, it is necessary to consider the following issues: - the geographic situation of Poland - the political transformations that occurred after World War II – forced development of heavy industry combined with neglect of its effects on the environment, and - the economic problems The three main goals of Environmental Engineering V are (I) to assess the state of scientific research in various areas of environmental engineering. (II) to evaluate organizational, technical and technological progress in contributing to ecological security, and (III) to determine the place of environmental engineering in sustainable development, taking into account political and economic conditions. Environmental Engineering V is of interest for academics, engineers and professionals involved in environmental engineering, seeking solutions for environmental problems in emerging new democracies, especially those who plan to participate in numerous projects sponsored by the European Union.

Activated Sludge and Aerobic Biofilm Reactors

Author: Marcos von Sperling
Publisher: IWA Publishing
ISBN: 1843391651
Format: PDF, Docs
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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.

Handbook of Water and Wastewater Treatment Plant Operations Third Edition

Author: Frank R. Spellman
Publisher: CRC Press
ISBN: 1466553375
Format: PDF, ePub, Mobi
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Handbook of Water and Wastewater Treatment Plant Operations the first thorough resource manual developed exclusively for water and wastewater plant operators has been updated and expanded. An industry standard now in its third edition, this book addresses management issues and security needs, contains coverage on pharmaceuticals and personal care products (PPCPs), and includes regulatory changes. The author explains the material in layman’s terms, providing real-world operating scenarios with problem-solving practice sets for each scenario. This provides readers with the ability to incorporate math with both theory and practical application. The book contains additional emphasis on operator safety, new chapters on energy conservation and sustainability, and basic science for operators. What’s New in the Third Edition: Prepares operators for licensure exams Provides additional math problems and solutions to better prepare users for certification exams Updates all chapters to reflect the developments in the field Enables users to properly operate water and wastewater plants and suggests troubleshooting procedures for returning a plant to optimum operation levels A complete compilation of water science, treatment information, process control procedures, problem-solving techniques, safety and health information, and administrative and technological trends, this text serves as a resource for professionals working in water and wastewater operations and operators preparing for wastewater licensure exams. It can also be used as a supplemental textbook for undergraduate and graduate students studying environmental science, water science, and environmental engineering.