Nitrification and Denitrification in the Activated Sludge Process

208 Pages·2002·1.05 MB·English

by  Michael H. Gerardi

Nitrification and
Denitrification in the
Activated Sludge Process
Michael H. Gerardi
A John Wiley & Sons, Inc., Publication

Nitrification and
Denitrification in the
Activated Sludge Process

Nitrification and
Denitrification in the
Activated Sludge Process
Michael H. Gerardi
A John Wiley & Sons, Inc., Publication
Thisbookisprintedonacid-freepaper.zy
Copyright(2002byJohnWileyandSons,Inc.,NewYork.Allrightsreserved.
PublishedsimultaneouslyinCanada.
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LibraryofCongressCataloging-in-PublicationData:
Gerardi,MichaelH.
Wastewatermicrobiology:nitrification/denitrificationintheactivatedsludge
process/MichaelH.Gerardi.
p. cm.
Includesbibliographicalreferences.
ISBN0-471-06508-0(cloth:alk.paper)
1.Sewage—Purification—Nitrogenremoval. 2. Nitrification. 3. Sewage—
Purification—Activatedsludgeprocess. I. Title.
TD758.3.N58G472002 2001046765
PrintedintheUnitedStatesofAmerica.
10 9 8 7 6 5 4 3 2 1
To
L. Vernon Frye
and
the men and women of the
Williamsport Sanitary Authority
and
Williamsport Municipal Water Authority
The author extends his sincere appreciation to
joVanna Gerardi for computer support
and
Cristopher Noviello for artwork used in this text.
Contents
Preface xi
PART I OVERVIEW 1
1 Nitrogen: Environmental and Wastewater Concerns 3
2 The Oxidation States of Nitrogen 11
3 Nitrogenous Compounds 17
4 Bacteria 21
5 The Activated Sludge Process 31
PART II NITRIFICATION 35
6 Introduction to Nitrification 37
7 Nitrifying Bacteria 43
8 Organotrophs 55
9 The Wastewater Nitrogen Cycle 63
vii