Modeling of Aerobic Wastewater Treatment Processes 121

Mogens Henze

4.1 Introduction 121

4.2 Purpose of Modeling 121

4.3 Elements of Activated Sludge Models 122

4.3.1 Transport Processes and Treatment Plant Layout 122

4.3.1.1 Aeration 122

4.3.1.2 Components 123

4.3.1.3 Processes 123

4.3.1.4 Hydraulic Patterns 123

4.4 Presentation of Models 123

4.4.1 Mass Balances 124

4.4.2 Rates 124

4.4.3 Component Participation 124

4.5 The Activated Sludge Models Nos. 1, 2 and 3

(ASM1, ASM2, ASM3) 124

4.5.1

Activated Sludge Model No. 1

(ASM1)

125

4.5.2

Activated Sludge Model No. 2

(ASM2)

127

4.5.3

Activated Sludge Model No. 3

(ASM3)

127

4.6

Wastewater Characterization

128

4.7

Model Calibration 130

4.8

Computer Programs 131

4.9

Use of Models 131 References 133

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