A COMPUTER BASED TOOL FOR THE SIMULATION, A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES WASTEWATER TREAMENT PROCESSES By By P. Vega, F P. Vega, F . . Alawneh, Alawneh, L. González, L. González, M M . . Francisco, Francisco, B. Pérez B. Pérez University of Salamanca University of Salamanca (Spain) (Spain) 6 6 th th European Congress of Chemical Engineering European Congress of Chemical Engineering Copenhaguen, Copenhaguen, September September 16-21, 16-21, 200 200 7 7
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A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES By P. Vega, F. Alawneh, L. González, M. Francisco,
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A COMPUTER BASED TOOL FOR THE SIMULATION, A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSESWASTEWATER TREAMENT PROCESSES
ByBy
P. Vega, FP. Vega, F.. Alawneh, Alawneh, L. González, L. González, MM.. Francisco, Francisco, B. PérezB. Pérez
University of SalamancaUniversity of Salamanca (Spain) (Spain)
66th th European Congress of Chemical EngineeringEuropean Congress of Chemical EngineeringCopenhaguen, Copenhaguen, September September 16-21,16-21, 200 20077
A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES
Motivation and Objective
Integrated Design
Software Package
Conclusion
Motivation and ObjectivesMotivation and Objectives
• The field of integrated process design and control has reached a maturity level that mingles the best from process knowledge and understanding of the control theory on one side, with the best from numerical analysis and optimization on the other
• Simultaneous approach to the design and control leads to significant economic benefits and improved dynamic performance during plant operation
• The Integration of Process Design and Control, bringing together the developments of a variety of design tools for the process design, has immense potential and advantages:
Reduce costs significantly
Reduce the iterations between separate design operations- like synthesis and control system design
Saves design time, and improves design efficiency
• Today's designers need to consider several critical parameters and objectives. Their interrelationships require design tools that can perform concurrent optimization which can only be accomplished when the tools are part of an integrated design-tool suite
A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES
Motivation and Objective
Integrated Design
Software Package
Conclusion
1. Plant Structure Selection (Plant & Control)
2. Optimization Model Definition (costs, Controllability index, restrictions, etc...)
3. Optimal Design Parameters Calculations (plants, controller, steady state working point, etc..)
Integrated Design Methodology considers that the changes in the process design might make the system more controllable. The methodology allows for the evaluation of the plant parameters and the control system at the same time
The methodology that the support tool use combines the design of the plant, and the controller following a cost optimization procedure, with the desired closed loop dynamic as constraints
A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES
Motivation and Objective
Integrated Design
Software Package
Conclusion
The cost functions include the investment, operation costs, and dynamical indexes (like the Integral Square Error (ISE))
The constraints are selected to ensure that the values of some controllability parameters, the H∞ norm performance and many other performance criteria are within specified bounds
The independent variable set includes plant dimensions, an operation point and the controller parameter
This problem is stated mathematically as a NLP /DAE multi-objective optimization problem with non-linear constraints
A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES
Motivation and Objective
Integrated Design
Software Package
Conclusion
Parameters SQP AG AG refined
V (m3) 8570 9664 8611
A (m2) 3084 2405 3026.1
S1 (mg/l) 47.38 59.00 38.63
ISE 79791 75114 79771
Cost 0.1335 0.1355 0.1292
Kp -11.94 -41.10 -7.33
Ti 0.1330 626.7 415.1
Norm H 0.4220 0.1274 0.1080
Simulation of the obtained plant, operation point calculation, dimension calculation, costs and controllability index calculation, compare results, save results
A COMPUTER BASED TOOL FOR THE SIMULATION, INTEGRATED DESIGN, AND CONTROL OF WASTEWATER TREAMENT PROCESSES
Motivation and Objective
Integrated Design
Software Package
Conclusion
• The tool showed its efficiency as a support tool for Integrated Design or for the simulation of the process. It includes the most common optimization methods and suitable control systems for the activated sludge process.
• Using the tool make the Integrated Design process easier and friendly (easy data entry and getting results).
• Work is going on the improvement of this support tool adding more modules for the fault detection and diagnosis, control system design and synthesis calculations.