Improved design and optimization of aeration control for WWTPs by dynamic simulation

Area of Science:

• Environmental Engineering
• Process Control and Automation
• Wastewater Treatment Technologies

Background:

• Aeration systems are critical components in wastewater treatment plants (WWTPs), significantly impacting operational efficiency and energy consumption.
• Current control strategies for WWTP aeration systems may lack the predictability and efficiency required for optimal performance.
• Simulation tools are essential for developing and validating advanced control concepts before implementation in real-world systems.

Purpose of the Study:

• To develop a comprehensive model library in MATLAB/SIMULINK for simulating WWTP aeration systems.
• To facilitate the design, testing, and validation of advanced, efficient, and predictable control strategies for aeration processes.
• To support the practical implementation of enhanced control schemes in operational WWTPs.

Main Methods:

• Development of a detailed simulation model library covering all essential components of an aeration system, including compressors, air rails, piping, valves, membranes, and controllers.
• Utilizing the MATLAB/SIMULINK environment for creating and executing the simulation models.
• Application of a "most open valve" (MOV) concept to demonstrate a flexible reference value for common air rail pressure control.

Main Results:

• The developed model library enables comprehensive simulation of WWTP aeration systems.
• The simulation environment facilitates the testing and refinement of various control strategies.
• Demonstrated the effectiveness of a flexible reference value control scheme based on the MOV concept for optimizing aeration control.

Conclusions:

• The MATLAB/SIMULINK model library provides a valuable tool for advancing the control of WWTP aeration systems.
• The simulation approach supports the development of more predictable and energy-efficient aeration control strategies.
• The MOV-based control concept shows promise for enhancing the operational flexibility and performance of WWTP aeration.