Gerardi Nitrification and Denitrification in the Activated Sludge Process

1. Auflage 2003
ISBN: 978-0-471-46131-9
Verlag: John Wiley & Sons
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 208 Seiten, E-Book

Reihe: Wastewater Microbiology

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

Autoren/Hrsg.

Gerardi, Michael H.

Inhaltsverzeichnis

Preface.
PART I: OVERVIEW.
1 Nitrogen: Environmental and Wastewater Concerns.
2 The Oxidation States of Nitrogen.
3 Nitrogenous Compounds.
4 Bacteria.
5 The Activated Sludge Process.
PART II: NITRIFICATION.
6 Introduction to Nitrification.
7 Nitrifying Bacteria.
8 Organotrophs.
9 The Wastewater Nitrogen Cycle.
10 Nitrogen Assimilation.
11 Forms of Nitrification.
12 Indicators of Nitrification.
13 Nitrite Ion Accumulation.
14 BOD.
15 Dissolved Oxygen.
16 Alkalinity and pH.
17 Temperature.
18 Inhibition and Toxicity.
19 Mode of Operation.
20 Classification of Nitrification Systems.
21 Troubleshooting Key and Tables.
PART III: DENITRIFICATION.
22 Introduction to Denitrification.
23 Denitrifying Bacteria.
24 Biochemical Pathway and Respiration.
25 Gaseous End Products.
26 Sources of Nitrite Ions and Nitrate Ions.
27 Operational Factors Influencing Denitrification.
28 Substrate or cBOD.
29 Free Molecular Oxygen.
30 The Occurrence of Denitrification.
31 Monitoring and Correcting Accidental Denitrification.
32 Zoning.
33 Benefits of Denitrification.
APPENDIX I: THE GRAM STAIN.
APPENDIX II: F/M, HRT, MCRT.
References.
Abbreviations and Acronyms.
Chemical Compounds and Elements.
Glossary.
Index.

Über Autor(innen)

MICHAEL H. GERARDI is Research Project Associate and Instructor at the Pennsylvania State University in Linden, Pennsylvania.