Activated sludge model

Abstract: Introduction and Background Classification of Biochemical Operations The Role of Biochemical Operations Criteria for Classification Common "Named" Biochemical Operations Key Points Study Questions References Fundamentals of Biochemical Operations Overview of Biochemical Operations Major Types of Microorganisms and Their Roles Microbial Ecosystems in Biochemical Operations Important Processes in Biochemical Operations Key Points Study Questions References Stoichiometry and Kinetics of Aerobic/Anoxic Biochemical Operations Stoichiometry and Generalized Reaction Rate Biomass Growth and Substrate Utilization Soluble Microbial Product Formation Solubilization of Particulate and High Molecular Weight Organic Matter Ammonification and Ammonia Utilization Phosphorus Uptake and Release Simplified Stoichiometry and Its Use Effects of Temperature Key Points Study Questions References Theory: Modeling of Ideal Suspended Growth Reactors Modeling Suspended Growth Systems Modeling Microbial Systems Mass Balance Equation Reactor Types Modeling Nonideal Reactors Key Points Study Questions References Aerobic Growth of Heterotrophs in a Single Continuous Stirred Tank Reactor Receiving Soluble Substrate Basic Model for a Continuous Stirred Tank Reactor Extensions of the Basic Model Effects of Kinetic Parameters Biomass Wastage and Recycle Key Points Study Questions References Multiple Microbial Activities in a Single Continuous Stirred Tank Reactor International Water Association Activated Sludge Models Effect of Particulate Substrate Nitrification and Its Impacts Denitrification and Its Impacts Multiple Events Key Points Study Questions References Multiple Microbial Activities in Complex Systems Modeling Complex Systems Conventional and High Purity Oxygen Activated Sludge Step Feed Activated Sludge Contact Stabilization Activated Sludge Modified Ludzack-Ettinger Process Four-Stage Bardenpho Process Biological Phosphorus Removal Process Sequencing Batch Reactor Key Points Study Questions References Stoichiometry, Kinetics, and Simulations of Anaerobic Biochemical Operations Stoichiometry of Anaerobic Biochemical Operations Kinetics of Anaerobic Biochemical Operations Anaerobic Digestion Model No. 1 Key Points Study Questions References Techniques for Evaluating Kinetic and Stoichiometric Parameters Treatability Studies Simple Soluble Substrate Model with Traditional Decay as Presented in Chapter 5 Simple Soluble Substrate Model with Traditional Decay in the Absence of Data on the Active Fraction Use of Batch Reactors to Determine Monod Kinetic Parameters for Single Substrates Complex Substrate Model with Lysis:Regrowth Approach to Decay as Presented in Chapter 6 (International Water Association Activated Sludge Model No. 1) Using Traditional Measurements to Approximate Wastewater Characteristics for Modeling Key Points Study Questions References Applications: Suspended Growth Reactors Design and Evaluation of Suspended Growth Processes Guiding Principles Iterative Nature of Process Design and Evaluation Basic Decisions during Design and Evaluation Levels of Design and Evaluation Key Points Study Questions References Activated Sludge Process Description Factors Affecting Performance Process Design Process Operation Key Points Study Questions References Biological Nutrient Removal Process Description Process Design Process Operation Key Points Study Questions References Aerobic Digestion Process Description Factors Affecting Performance Process Design Process Operation Study Questions References Anaerobic Processes Process Description Factors Affecting Performance Process Design Key Points Study Questions References Lagoons Process Description Factors Affecting Performance Process Design Process Operation Key Points Study Questions References Theory: Modeling of Ideal Attached Growth Reactors Biofilm Modeling Effects of Transport Limitations Effects of Multiple Limiting Nutrients Multispecies Biofilms Multidimensional Mathematical Models of Biofilms Key Points Study Questions References Biofilm Reactors Packed Towers Rotating Disc Reactors Key Points Study Questions References Fluidized Bed Biological Reactors Description of Fluidized Bed Biological Reactor Fluidization Modeling Fluidized Bed Biological Reactors Theoretical Performance of Fluidized Bed Biological Reactors Sizing a Fluidized Bed Biological Reactor Key Points Study Questions References Applications: Attached Growth Reactors Trickling Filter Process Description Factors Affecting Performance Process Design Process Operation Key Points Study Questions References Rotating Biological Contactor Process Description Factors Affecting Performance Process Design Process Operation Key Points Study Questions References Submerged Attached Growth Bioreactors Process Description Factors Affecting Performance Process Design Process Operation Key Points Study Questions References Future Challenges Fate and Effects of Xenobiotic Organic Chemicals Biodegradation Abiotic Removal Mechanisms Relative Importance of Biotic and Abiotic Removal Effects of Xenobiotic Organic Chemicals Experience with Xenobiotic Organic Chemicals Key Points Study Questions References Designing Systems for Sustainability Defining Sustainability Technologies to Achieve Greater Water Resource Availability Technologies to Achieve Lower Energy and Chemical Consumption Technologies to Achieve Resource Recovery Closing Comments Study Questions References Appendix A: Acronyms Appendix B: Symbols Appendix C: Unit Conversions Index

Abstract: The Activated Sludge Model No. 3 (ASM3) can predict oxygen consumption, sludge production, nitrification and denitrification of activated sludge systems. It relates to the Activated Sludge Model No. 1 (ASM1) and corrects for some defects of ASM1. In addition to ASM1, ASM3 includes storage of organic substrates as a new process. The lysis (decay) process is exchanged for an endogenous respiration process. ASM3 is provided as a reference in a form which can be implemented in a computer code without further adjustments. Typical kinetic and stoichiometric parameters are provided for 10°C and 20°C together with the composition of a typical primary effluent in terms of the model components.