Settleability problems and loss of solids in the activated sludge process

著者

• Gerardi, Michael H

書誌事項

Settleability problems and loss of solids in the activated sludge process

Michael H. Gerardi

（Wastewater microbiology series, [v. 2]）（Environmental Protection magazine series）

Wiley-Interscience, c2002

注記

"Volume II of the definitive series on the microbiology of wastewater treatment" -- p. [4] of cover

Includes bibliographical references (p. 163-165) and index

内容説明・目次

内容説明

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.

目次

Preface. PART I: OVERVIEW. The Activated Sludge Process. Floc Formation. A Floc Formation Model. Interruption of Floc Formation. PART II: SETTLEABILITY PROBLEMS AND LOSS OF SOLIDS. Introduction. Undesired Filamentous Growth. Nutrient-Deficient Floc Particles. Denitrification. Sheared Floc Particles. Dispersed Floc Particles. Heavy Metals and Congealed Floc Particles. Low Dissolved Oxygen Concentration. Young Sludge Age. Floc Particles Lost Through Sludge Aging. Slug Discharge of Soluble cBOD. Viscous Bulking or Zoogloeal Growth. Increase in Percent MLVSS. Colloidal Floc Particles. Temperature. PART III: FOAM AND SCUM. Production and Accumulation of Foam and Scum. Identification of Foam. Controlling Foam Production and Accumulation. PART IV: SETTLEABILITY TESTING. Settleability Testing and Settling Rate. Settleability Testing: Microscopic Analyses. Appendix I: F/M, HRT, MCRT, MLVSS, Sludge Age, SVI. Appendix II: Microscopic Techniques. References. Abbreviations and Acronyms. Chemical Compounds and Elements. Glossary. Index.

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詳細情報

• NII書誌ID(NCID): BA90405397
• ISBN:
  • 0471206946
• LCCN: 2002028852
• 出版国コード: us
• タイトル言語コード: eng
• 本文言語コード: eng
• 出版地: Hoboken, N.J.
• ページ数/冊数: x, 179 p.
• 大きさ: 26 cm
• 分類:
  • LCC : TD756
  • DC21 : 628.3/54
• 件名:
  • LCSH : Sewage -- Purification -- Activated sludge process
• 親書誌ID:
  • BA64659092
  • BA90405218