Nyhet

Wastewater Engineering and Treatment 3

Elimination of Nitrogen and Phosphorus, Clarification

AvKader Gaid

Inbunden, Engelska, 2026

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Beskrivning

This book provides an overview of biological wastewater treatment and sludge recovery. It presents the main concepts related to treatment processes, as well as the principles of operation, sizing, and implementation of unit operations and processes associated with wastewater and sludge treatment.Wastewater Engineering and Treatment 3 analyzes biological nitrogen removal processes (ammonia, nitrites and nitrates), biological and physicochemical phosphorus removal processes, and wastewater clarification.Didactic and combining theory with practice, this book is intended for engineers in engineering and environmental sciences, as well as professionals in wastewater treatment.

Produktinformation

Utgivningsdatum:2026-06-12
Format:Inbunden
Språk:Engelska
Serie:ISTE Invoiced
Antal sidor:288
Förlag:ISTE Ltd
ISBN:9781836690573

Utforska kategorier

Miljöteknik inom Naturvetenskap och teknik

Mer om författaren

Kader Gaid is a professor at the University of Science and Technology Houari Boumediene, Algeria, and has been an expert at Veolia for over 25 years.

Innehållsförteckning

Chapter 1. Biological Removal of Nitrogen 11.1. Nitrogen sources 21.2. Biochemical mechanisms of nitrogen utilization 41.2.1. Ammonification 41.2.2. Nitrification 61.2.3. Denitrification 91.3. Factors influencing nitrification 161.3.1. Temperature 171.3.2. Growth rate 181.3.3. Oxygen 191.3.4. pH and alkalinity 191.3.5. Nutrients 201.3.6. Dissolved oxygen and nitrogen substrate 201.4. Nitrification in an activated sludge system 221.4.1. Influence of mass loading 221.4.2. Influence of TSS/MVS concentration in the tank 231.4.3. Influence of loading rate 231.4.4. Influence of sludge age 241.4.5. Nitrification rate 241.4.6. O2 requirement 251.4.7. Dynamic model of nitrification 271.5. Denitrification in activated sludge and denitrification rate 301.5.1. Specific anoxic zone for denitrification 341.5.2. Estimation of excess sludge production 351.5.3. Carbon addition 361.6. Nitrification and denitrification processes in activated sludge 371.6.1. Pre-denitrification 371.6.2. Post-denitrification 371.7. Autotrophic denitrification of activated sludge 401.7.1. Autotrophic denitrification mechanism with sulfur 411.7.2. Autotrophic denitrification in free culture (activated sludge) 431.7.3. Autotrophic denitrification in a biofilter 461.8. Nitrogen treatment by anammox bacteria 521.8.1. Anammox characteristics 541.8.2. Microbiological characteristics 541.8.3. Biochemistry of anaerobic oxidation of ammonium 551.8.4. Factors influencing the growth of anammox bacteria 571.8.5. Salinity 571.8.6. Presence of organic matter and/or nutrients 571.8.7. Candidatus Brocadia and Kuenenia 581.8.8. Oxygen 601.8.9. Temperature 601.8.10. Substrate concentrations 601.8.11. Nitrite 601.8.12. Ammonium ion (NH4+) 611.8.13. Inhibition mechanisms and pH 621.8.14. Implementation using anammox bacteria 621.8.15. Nitrogen removal processes using anammox 671.8.16. Applications 761.9. MABR: a new opportunity 791.10. Conclusion 801.11. References 81Chapter 2. Phosphorus Removal 932.1. The phosphorus cycle 932.2. Eutrophication 952.3. Oxidized mineral forms of phosphorus in wastewater 962.4. Phosphorus removal processes 1002.4.1. Overview 1002.4.2. Biological phosphorus removal 1012.5. Treatment processes incorporating biological dephosphatation 1162.5.1. Activated sludge 1172.5.2. Biofilters: introduction of reagents into the primary settling tank 1252.5.3. Other biological phosphorus removal technologies 1252.6. Selectors 1302.6.1. Aerobic selector 1312.6.2. Anoxic selector 1312.6.3. Anaerobic selector 132Contents vii2.7. Physicochemical treatment 1332.7.1. Fundamental principles of phosphorus precipitation 1352.8. Implementation of chemical reagents 1522.8.1. Injection points 1522.8.2. Injection control 1522.9. Other technical solutions for phosphorus removal 1562.9.1. Active media for phosphorus removal 1562.9.2. Artificial wetlands 1592.9.3. Ion exchange 1592.10. Overall phosphorus removal performance 1602.11. References 161Chapter 3. Clarification. 1713.1. Introduction 1713.1.1. Principle 1713.1.2. Types of clarifiers 1723.2. Settling rate of particles in a liquid 1733.2.1. Diluted suspensions 1733.2.2. Flocculated particles 1763.2.3. Concentrated suspensions 1773.2.4. Sedimentation curves 1783.3. Settling theory 1803.3.1. Fundamental law: Kynch theory. 1803.4. Mathematical interpretation of the different types of settling 1873.4.1. Free or coalescent settling (zone B, Figure 3.2) 1873.4.2. Hindered settling (zone C, Figure 3.2) 1933.4.3. Compaction zone 1973.5. Sizing of clarifiers 1973.5.1. Different sizing approaches 2013.5.2. Coalescing settling (zone B, Figure 3.13) 2033.5.3. Hindered settling zone and sludge blanket clarifiers (zone C, Figure 3.13) 2073.5.4. Sludge compaction zone (zone D, Figure 3.13) 2083.5.5. Relationship between settling rate and height of equipment 2113.6. Characteristics of classic clarifiers 2153.6.1. Horizontal clarifiers 2163.6.2. Cylindrical clarifiers 2213.6.3. Other technologies 2253.6.4. General design of conventional clarifiers 2253.7. Inclined pipe clarifiers 2323.7.1. Theory and principle 2333.7.2. Sizing principles for lamellar clarifiers 2363.8. Clarifier malfunctions 2433.9. Technologies 2453.9.1. Clariflo clarifier (Veolia) 2453.9.2. Rim-Flo clarifier 2473.9.3. TowBro scraper 2493.9.4. Lamellar settling tank: Multiflo (Veolia) 2503.10. References 255Index 259