Activated Sludge Models ASM1, ASM2, ASM2D and ASM3 (Scientific & Technical Reports, No. 9)

Contentes......Page 5
Preface......Page 3
List of Task Group members......Page 6
1. Activated Sludge Model No. 1......Page 7
Introduction......Page 11
Format and notation......Page 12
Continuity check......Page 13
Conceptual model......Page 14
Components in mathematical models......Page 16
Processes in the model......Page 18
Characterization of wastewater and estimation of stoichiometric coefficients......Page 22
Estimation of kinetic parameters......Page 24
Typical parameter values......Page 29
Default values......Page 30
Environmental effects......Page 31
Constraints upon the application of the model......Page 32
Definition of initial conditions......Page 34
Factors governing step sizes during numerical integration......Page 35
Structure of a possible program......Page 36
Steady state solution for a single CSTR......Page 37
Sample output......Page 40
Conclusion......Page 42
References......Page 43
2. Activated Sludge Model No. 2......Page 45
1.5 Final note......Page 49
2.1 Components in the model......Page 50
2.2 Basis for the introduction of ASM2......Page 52
2.3 Biological processes, stoichiometry and kinetics......Page 53
2.4 Chemical precipitation of phosphates......Page 58
3. Typical wastewater characteristics, kinetic and stoichiometric constants for the Activated Sludge Model No. 2......Page 59
4.2 Characterization of wastewater......Page 63
4.3 Routine analysis of model components......Page 66
4.4 Soluble analysis as a tool in characterization......Page 68
4.6 Present status for measurement/estimation of problematic components......Page 69
5. Calibration of the Activated Sludge Model No. 2......Page 72
5.2 Calibration using non-dynamic data (Level 1)......Page 73
5.3 Calibration using dynamic data (Level 2)......Page 74
5.4 Calibration of temperature dependency......Page 75
6.1 Assumptions regarding phosphate-accumulating organisms (PAOs)......Page 76
6.2 Restrictions due to model structure......Page 77
6.4 Important questions for further research......Page 78
7. Conclusion......Page 79
3. Activated Sludge Model No. 2d......Page 81
1. Introduction......Page 85
2. Conceptual approach......Page 86
3.1 Components in the model......Page 87
3.2 Basis for the introduction of ASM2......Page 89
3.3 Biological processes, stoichiometry and kinetics......Page 90
3.4 Chemical precipitation of phosphates......Page 95
4. Typical wastewater characteristics and kinetic and stoichiometric constants......Page 97
6. Conclusion......Page 102
7. References and bibliography......Page 103
4. Activated Sludge Model No. 3......Page 105
1. Introduction......Page 109
2. Comparison of ASM1 and ASM3......Page 111
3.1 Definition of soluble compounds, S?......Page 112
3.2 Definition of particulate compounds, X?......Page 113
4. ASM3: definition of processes in the model......Page 114
5. ASM3: stoichiometry......Page 115
6.1 Estimation of readily biodegradable substrate SS......Page 117
7. Limitations of ASM3......Page 119
8. Aspects of application of ASM3......Page 120
9.3 Adjusting kinetic and stoichiometric parameters for ASM3C......Page 122
9.5 Modelling pH with ASM3C......Page 123
9.6 Limitations of ASM3C......Page 125
10. Conclusion......Page 126
11. References......Page 127