Mass Transfer Characteristics of Floating Media in MBBR and IFAS Fixed-Film Systems.

Cover -- Copyright -- Acknowledgments -- Abstract and Benefits -- Table of Contents -- List of Tables -- List of Figures -- List of Acronyms -- Executive Summary -- Chapter 1.0: Introduction -- Chapter 2.0: Literature Review -- 2.1 Kinetic Rate Measurement -- 2.2 Modeling Background -- Chapter 3.0: Experimental Program Development -- Chapter 4.0: Methods -- 4.1 Continuous-Flow Reactors and Feed -- 4.2 Continuous-System Reactor Operation -- 4.2.1 pH Control -- 4.2.2 Mixing -- 4.2.2.1 G Calculation -- 4.2.2.2 Aeration and Evaluation of Mixing Configurations -- 4.2.2.3 Typical Full-Scale Mixing Rates -- 4.3 Startup and Routine Operation of Continuous Systems -- 4.4 Batch Tests -- 4.5 Analytical Methods -- 4.5.1 Biomass Measurements -- 4.5.2 Nitrogen Species -- 4.5.3 Dissolved Oxygen -- 4.5.4 pH -- 4.5.5 Data Collection and Recording -- 4.5.6 Batch Test Data Analysis -- Chapter 5.0: Model Concept -- 5.1 Batch Test Observations -- 5.2 Model Format -- 5.3 Model Sensitivity Testing -- 5.4 Model Equation -- Chapter 6.0: Experimental Results -- 6.1 Continuous-Flow Reactors -- 6.1.1 Phase 1 (21°C) -- 6.1.1.1 Reactor 1 -- 6.1.1.2 Reactor 2 -- 6.1.2 Phase 2 (10.5°C) -- 6.1.2.1 Reactor 1 -- 6.1.2.2 Reactor 2 -- 6.1.3 Phase 3 (Return to 21°C) -- 6.1.3.1 Reactor 1 -- 6.1.3.2 Reactor 2 -- 6.1.4 SALR and Flux (J) -- 6.2 Batch Tests -- 6.2.1 Reproducibility of Batch Tests Performed on a Single Day -- 6.2.2 Correlation between Mixing Rate and DO Concentration -- 6.2.3 Batch Test Results -- Chapter 7.0: Model Evaluation -- Chapter 8.0: Findings -- 8.1 Model Equation -- 8.1.1 Bulk Phase Ammonia -- 8.1.2 Bulk Phase DO -- 8.1.3 Mixing Rate -- 8.1.4 Temperature -- 8.1.5 Partial Nitrification -- 8.1.6 Model Structure -- 8.2 Model Evaluation -- 8.3 Media Comparison -- 8.4 Model Application -- 8.5 Continuous-Flow Reactors -- 8.6 Oxygen Flux -- Chapter 9.0: Conclusions.

9.1 Experimental Methods -- 9.2 Mass Transfer Modeling -- 9.3 Model Application -- 9.4 Media Comparison -- 9.5 Next Steps -- Chapter 10.0: Recommendations -- 10.1 Recommended Continuous-System Protocol -- 10.1.1 Reactor Construction -- 10.1.2 Nutrient and Water Feed Preparation -- 10.1.3 Plastic Media Inoculation -- 10.1.4 Selection of Percent Fill and Mixing Rates -- 10.1.5 Continuous-Flow System Startup -- 10.1.6 Daily Maintenance -- 10.1.7 Monitoring Performance -- 10.2 Recommended Batch Test Protocol -- Appendix A: Evaluation of Sealed Reactor with Air Recirculation for Oxygen Uptake Rate Tests -- Appendix B: Sample Velocity Gradient Calculation -- Appendix C: Inhibition -- Appendix D: Batch Test Results -- References.

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