Related Experiment Videos
Nitrification parameter measurement for plant design: experience and experimental issues with new methods.
1EnviroSim Associates Ltd., 205-7 Innovation Drive, Flamborough, ON L9H 7H9, Canada. jones@envirosim.com
Summary
This study details methods for measuring nitrifier maximum specific growth rate (micro(AUT)) in activated sludge systems. It also addresses the crucial, yet understudied, nitrifier decay rate (b(AUT)) for improved wastewater treatment plant design.
Area of Science:
- Environmental Engineering
- Microbiology
- Wastewater Treatment
Background:
- Nitrification kinetics are critical for activated sludge process design, optimization, and capacity rating.
- Previous research identified a need for better methods to measure nitrifier growth and decay rates.
Purpose of the Study:
- To describe bench-scale methods for measuring the nitrifier maximum specific growth rate (micro(AUT)).
- To investigate the influence of pH and temperature on micro(AUT) measurements.
- To summarize micro(AUT) data from various locations and techniques.
Main Methods:
- Three bench-scale methods were employed: Low F/M SBR, Washout, and High F/M.
- Experimental work focused on controlling and understanding the impact of pH and temperature.
- Measurements of micro(AUT) were conducted across different sites.
Main Results:
- Detailed procedures for measuring micro(AUT) were developed and tested.
- The study provides a summary of micro(AUT) values obtained using different methods and locations.
- Further insights into the importance of environmental factors like pH and temperature were gained.
Conclusions:
- The described methods offer reliable approaches for determining nitrifier maximum specific growth rates.
- Accurate kinetic data, including growth and decay rates, are essential for effective activated sludge modeling and plant operation.
- This work contributes valuable data for enhancing the design and management of wastewater treatment facilities.