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Activated Sludge Wastewater Treatment: Process Control & Optimization for the Operations Professional

  • ID: 4718702
  • Book
  • 530 pages
  • DEStech Publications, Inc
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  • Scientific and data-driven process controls for activated sludge
  • New ways for understanding, monitoring clarifiers, digesters, aeration basins and more
  • Simplified math problem solving and statistics for control
  • Strategies for reducing costs and recovering resources
  • A handy reference, a valuable textbook, an operations manual
  • Contains information relevant to all levels of operator certification

This book is a milestone in the evolution of wastewater treatment operations. It explains the science of treatment framed within an ethics where wastewater personnel are seen as protectors of public health, preservers of the environment, and stewards of public monies. Written by a former plant operator with a Ph.D., the book presents the fundamental science behind the unit processes in wastewater treatment plants, including biological nutrient removal. In so doing, it challenges longstanding operational doctrines enshrined by habit and tradition, such as being careful not to remove too many influent organics in a primary clarifier for fear of starving the microorganisms in the aeration basin, or using the MLSS concentration to control effluent quality, or cutting the growth rate of microorganisms in anticipation of their slower growth rate in winter. Dispelling much of the prevailing that’s-the-way-we’ve-always-done-it dogma is achieved through an elegant and understandable presentation of the biology, chemistry, and physics that explain the phenomena of wastewater treatment. At the same time, the book is intensely practical.

It offers detailed and data-based process control solutions to stabilize plant performance, maintain consistent effluent quality, and reduce energy costs. Powerful, easily implemented statistical techniques are given to unlock the meaning of plant performance data and make informed process control decisions. The book’s approach is learning-focused, including numerous examples of a failsafe, foolproof arithmetical method that enables operations professionals to define, set up, and solve problems.

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Foreword
Preface
Acknowledgments

Chapter 1. Operations Professionals
1.1. Introduction
1.2. Key Points
1.3. Review and Study Questions

Chapter 2. Wastewater and Wastewater Treatment Overview
2.1. Pollutants
2.2. Wastewater Treatment Plants
2.3. Model Wastewater Treatment Plant
2.4. Key Points
2.5. Review and Study Questions
2.6. References

Chapter 3. Primary Clarifier
3.1. Raw Wastewater Characteristics
3.2. Non-settleable TSS and BOD (TSSnon/BODnon) Test
3.3. Primary Clarifier Performance and Wastewater Characteristics
3.4. Primary Clarifier Performance Optimization
3.5. Chemically Enhanced Primary Treatment (CEPT)
3.6. Summary
3.7. Key Points
3.8. Review and Study Questions
3.9. References

Chapter 4. Aeration Basin
4.1. Process Objective
4.2. Bacterial Energetics and Growth
4.3. Measuring Conversion
4.4. Measuring Biomass Separation
4.5. Factors Affecting Conversion
4.6. Factors Affecting Biomass Separation
4.7. Summary
4.8. Key Points
4.9. Review and Study Questions
4.10. References

Chapter 5. Nutrient Removal
5.1. Ammonia Oxidation
5.2. Nitrogen Removal
5.3. Biological Phosphorus Removal
5.4. Nutrient Recovery
5.5. Summary
5.6. Key Points
5.7. Review and Study Questions
5.8. References

Chapter 6. Secondary Clarifier
6.1. Compaction
6.2. Solids Mass Balance
6.3. Process Objective
6.4. State Point Analysis
6.5. Settling Flux Curve Development
6.6. RAS Pumping Optimization
6.7. Summary
6.8. Key Points
6.9. Review and Study Questions
6.10. References

Chapter 7. Anaerobic Digester
7.1. Process Objective
7.2. Microbiology
7.3. Process Control and Performance
7.4. Seeding
7.5. Thickening
7.6. Summary
7.7. Key Points
7.8. Review and Study Questions
7.9. References

Chapter 8. Data Validity
8.1. Why Statistics?
8.2. Normal Curve
8.3. Central Limit Theorem
8.4. Statistical Process Control
8.5. Cumulative Summary Chart
8.6. Data Checks
8.7. Summary
8.8. Key Points
8.9. Review and Study Questions
8.10. References

Chapter 9. Optimization
9.1. The Goal
9.2. Primary Clarifier Optimization
9.3. Aeration Basin Optimization
9.4. Secondary Clarifier Optimization
9.5. Anaerobic Digester Optimization
9.6. Summary
9.7. Key Points
9.8. Review and Study Questions
9.9. References

Index

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