Settleability Problems and Loss of Solids in the Activated Sludge Process (eBook)

Michael H. Gerardi (Autor)

eBook Download: PDF

2003 | 1. Auflage
192 Seiten
John Wiley & Sons (Verlag)
978-0-471-27274-8 (ISBN)

Infos

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.

Autor

MICHAEL H. GERARDI, MS, James Madison University, and currently a research project associate at The Pennsylvania State University, is responsible for the development and presentation of wastewater biology courses. Previous to this appointment, he served as a technical coordinator and manager for the Williamsport (Pennsylvania) Sanitary Authority, where he was responsible for the operational and administrative functions of two activated sludge plants.

Inhalt

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.

Rezensionen

"...All in all it is an excellent example of applied and troubleshooting microbiology." (Microbiology Today, August 2003)

Produkt-Details

• Erscheint lt. Verlag: 17.6.2003
• Reihe/Serie: Wastewater Microbiology
• Reihe/Serie: Wastewater Microbiology
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Biologie ► Mikrobiologie / Immunologie
• Themenwelt: Naturwissenschaften ► Chemie
• Themenwelt: Technik ► Umwelttechnik / Biotechnologie
• Schlagworte: Chemie • Chemistry • Wasser • Wasserchemie • water chemistry
• ISBN-10: 0-471-27274-4 / 0471272744
• ISBN-13: 978-0-471-27274-8 / 9780471272748