Nitrification and Denitrification in the Activated Sludge Process
Wastewater Microbiology
1. Auflage Januar 2002
208 Seiten, Softcover
Wiley & Sons Ltd
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, permit
compliance, process control, and troubleshooting in wastewater
treatment plants. Avoiding the technical jargon, chemical
equations, and kinetics that typically accompany such texts,
Nitrification and Denitrification in the Activated Sludge Process
directly addresses plant operators and technicians, providing
necessary information for understanding the microbiology and
biological conditions that occur in the treatment process.
Of special interest to wastewater treatment plant operators are
the bacteria that degrade nitrogenous wastes-the nitrifying
bacteria-and the bacteria that degrade carbonaceous
wastes-the cBOD-removing bacteria. Both groups of bacteria
need to be routinely monitored and operational conditions favorably
adjusted to ensure desired nitrification. Each chapter in this
groundbreaking study offers a better understanding of the
importance of nitrification and denitrification and the bacteria
involved 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
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.
